{"id":8030,"date":"2025-05-16T11:53:49","date_gmt":"2025-05-16T09:53:49","guid":{"rendered":"https:\/\/malux.com\/kunskapsbankinlagg\/special-instructions-for-certain-types-of-machines-and-equipment-in-hazardous-areas\/"},"modified":"2026-02-20T14:39:56","modified_gmt":"2026-02-20T13:39:56","slug":"special-instructions-for-certain-types-of-machines-and-equipment-in-hazardous-areas","status":"publish","type":"kunskapsbankinlagg","link":"https:\/\/www.malux.com\/en\/kunskapsbankinlagg\/special-instructions-for-certain-types-of-machines-and-equipment-in-hazardous-areas\/","title":{"rendered":"Special instructions for certain types of machines and equipment in hazardous areas"},"content":{"rendered":"\n<div class=\"wp-block-stackable-columns stk-block-columns stk-block stk-dd5303e stk-block-background\" data-block-id=\"dd5303e\"><style>.stk-dd5303e {background-color:#ffdc2e !important;padding-top:80px !important;padding-bottom:80px !important;margin-bottom:0px !important;}.stk-dd5303e:before{background-color:#ffdc2e !important;}@media screen and (max-width: 767px){.stk-dd5303e {padding-top:60px !important;padding-bottom:60px !important;}}<\/style><div class=\"stk-row stk-inner-blocks stk-block-content stk-content-align stk-dd5303e-column\">\n<div class=\"wp-block-stackable-column stk-block-column stk-column stk-block stk-fb095a1\" data-v=\"4\" data-block-id=\"fb095a1\"><style>.stk-fb095a1 {max-width:1024px !important;min-width:auto !important;margin-right:auto !important;margin-left:auto !important;}@media screen and (max-width: 1023px){.stk-fb095a1 {max-width:90% !important;min-width:auto !important;}}<\/style><div class=\"stk-column-wrapper stk-block-column__content stk-container stk-fb095a1-container stk--no-background stk--no-padding\"><div class=\"stk-block-content stk-inner-blocks stk-fb095a1-inner-blocks\">\n<div class=\"wp-block-stackable-columns stk-block-columns stk-block stk-b55157f\" data-block-id=\"b55157f\"><style>.stk-b55157f {margin-bottom:30px !important;}.stk-b55157f-column{--stk-columns-spacing:0px !important;--stk-column-gap:60px !important;}@media screen and (max-width: 767px){.stk-b55157f {margin-bottom:0px !important;}}<\/style><div class=\"stk-row stk-inner-blocks stk-block-content stk-content-align stk-b55157f-column\">\n<div class=\"wp-block-stackable-column stk-block-column stk-column stk-block stk-daf32bb\" data-v=\"4\" data-block-id=\"daf32bb\"><div class=\"stk-column-wrapper stk-block-column__content stk-container stk-daf32bb-container stk--no-background stk--no-padding\"><div class=\"stk-block-content stk-inner-blocks stk-daf32bb-inner-blocks\">\n<div class=\"wp-block-stackable-heading stk-block-heading stk-block-heading--v2 stk-block stk-342a657\" id=\"elmaskiner\" data-block-id=\"342a657\"><h2 class=\"stk-block-heading__text\">Electrical machines<\/h2><\/div>\n\n\n\n<div class=\"wp-block-stackable-text stk-block-text stk-block stk-994ff68\" data-block-id=\"994ff68\"><style>@media screen and (max-width: 1023px){.stk-994ff68 {margin-bottom:30px !important;}}<\/style><p class=\"stk-block-text__text\">To ensure that a machine\u2019s temperature does not exceed the permitted limit, the machine shall be protected against overtemperature.<br\/><br\/>As protection against overtemperature, one of the following devices may be used:<br\/><br\/>&#8211; current-dependent overload protection connected in all phases and set to no more than the machine\u2019s rated current, e.g. a starter (motor protection circuit breaker) with overload relay. For star-connected motors connected to systems with<br\/>a non-directly earthed neutral point, however, connection in only two phases is required<br\/>&#8211; a temperature-sensing element built into the machine that actuates a suitable device for all-pole disconnection. The type-approval certificate or other documents shall show that the protection also functions effectively with a locked rotor<br\/>&#8211; other devices that provide protection equivalent to the above against impermissible temperature rise.  <br\/><br\/>The making and breaking capacity of devices for switching the motor on and off shall be equal to or greater than the motor\u2019s starting current.<br\/><br\/>Coordination between overload and short-circuit protection shall meet the highest requirements in the applicable standard.<\/p><\/div>\n<\/div><\/div><\/div>\n\n\n\n<div class=\"wp-block-stackable-column stk-block-column stk-column stk-block stk-283e630\" data-v=\"4\" data-block-id=\"283e630\"><div class=\"stk-column-wrapper stk-block-column__content stk-container stk-283e630-container stk--no-background stk--no-padding\"><div class=\"stk-block-content stk-inner-blocks stk-283e630-inner-blocks\">\n<div class=\"wp-block-stackable-text stk-block-text stk-block stk-066de8e\" data-block-id=\"066de8e\"><style>@media screen and (max-width: 1023px){.stk-066de8e {margin-bottom:30px !important;}}<\/style><p class=\"stk-block-text__text\">Automatic restart after disconnection due to overtemperature, etc., shall not occur. Measuring devices may have automatic reset. <br\/><br\/>When using current-dependent overload protection for a delta-connected motor, one of the following protections shall be used:<br\/><br\/>&#8211; a current-sensing relay set to no more than the motor\u2019s rated current (line current), combined with phase-imbalance protection so that tripping occurs with the motor unloaded and with an open circuit in one of the windings<br\/>&#8211; a current-sensing relay connected in each phase and set to 58% of the motor\u2019s rated current.<br\/>NOTE \u2013 Normal overload protection connected only in the main circuit of a delta-connected motor does not provide sufficient protection against temperature rise in the event of a winding open circuit. Only with a fully loaded motor is sufficient imbalance obtained in the line current for normal overload protection to operate. A delta-connected motor with a winding open circuit may also be able to start if no special measures are taken.  <br\/><br\/>A slip-ring motor shall, in addition to overtemperature protection as above, be protected by an instantaneous current-sensing device set to slightly above the calculated starting current, but not higher than four times the motor\u2019s rated current.<\/p><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n<div class=\"wp-block-stackable-columns stk-block-columns stk-block stk-15f4975 stk-block-background\" data-block-id=\"15f4975\"><style>.stk-15f4975 {background-color:#f5f5f5 !important;padding-top:80px !important;padding-bottom:80px !important;margin-bottom:0px !important;}.stk-15f4975:before{background-color:#f5f5f5 !important;}@media screen and (max-width: 767px){.stk-15f4975 {padding-top:60px !important;padding-bottom:60px !important;}}<\/style><div class=\"stk-row stk-inner-blocks stk-block-content stk-content-align stk-15f4975-column\">\n<div class=\"wp-block-stackable-column stk-block-column stk-column stk-block stk-ce1d7c2\" data-v=\"4\" data-block-id=\"ce1d7c2\"><style>.stk-ce1d7c2 {max-width:1024px !important;min-width:auto !important;margin-right:auto !important;margin-left:auto !important;}@media screen and (max-width: 1023px){.stk-ce1d7c2 {max-width:90% !important;min-width:auto !important;}}<\/style><div class=\"stk-column-wrapper stk-block-column__content stk-container stk-ce1d7c2-container stk--no-background stk--no-padding\"><div class=\"stk-block-content stk-inner-blocks stk-ce1d7c2-inner-blocks\">\n<div class=\"wp-block-stackable-columns stk-block-columns stk-block stk-e27b08c\" data-block-id=\"e27b08c\"><style>.stk-e27b08c {margin-bottom:30px !important;}.stk-e27b08c-column{--stk-columns-spacing:0px !important;--stk-column-gap:60px !important;}@media screen and (max-width: 767px){.stk-e27b08c {margin-bottom:0px !important;}}<\/style><div class=\"stk-row stk-inner-blocks stk-block-content stk-content-align stk-e27b08c-column\">\n<div class=\"wp-block-stackable-column stk-block-column stk-column stk-block stk-6dde180\" data-v=\"4\" data-block-id=\"6dde180\"><div class=\"stk-column-wrapper stk-block-column__content stk-container stk-6dde180-container stk--no-background stk--no-padding\"><div class=\"stk-block-content stk-inner-blocks stk-6dde180-inner-blocks\">\n<div class=\"wp-block-stackable-heading stk-block-heading stk-block-heading--v2 stk-block stk-612c6ad\" id=\"strong-transformatorer-strong\" data-block-id=\"612c6ad\"><h3 class=\"stk-block-heading__text\"><strong>Transformers<\/strong><\/h3><\/div>\n\n\n\n<div class=\"wp-block-stackable-text stk-block-text stk-block stk-73b1b1f\" data-block-id=\"73b1b1f\"><style>@media screen and (max-width: 1023px){.stk-73b1b1f {margin-bottom:30px !important;}}<\/style><p class=\"stk-block-text__text\">Power transformers should not be installed in zone E1.\n\nTransformers shall be provided with short-circuit protection on the primary side and, with the exception stated below, overload protection on the primary or secondary side.\n\nA transformer that continuously withstands the short-circuit current at rated voltage and rated frequency without impermissible temperature rise need not be provided with overload protection.<\/p><\/div>\n<\/div><\/div><\/div>\n\n\n\n<div class=\"wp-block-stackable-column stk-block-column stk-column stk-block stk-2c2756b\" data-v=\"4\" data-block-id=\"2c2756b\"><div class=\"stk-column-wrapper stk-block-column__content stk-container stk-2c2756b-container stk--no-background stk--no-padding\"><div class=\"stk-block-content stk-inner-blocks stk-2c2756b-inner-blocks\">\n<div class=\"wp-block-stackable-heading stk-block-heading stk-block-heading--v2 stk-block stk-97806c7\" id=\"strong-kondensatorer-strong\" data-block-id=\"97806c7\"><h3 class=\"stk-block-heading__text\"><strong>Capacitors<\/strong><\/h3><\/div>\n\n\n\n<div class=\"wp-block-stackable-text stk-block-text stk-block stk-5e37c1e\" data-block-id=\"5e37c1e\"><style>@media screen and (max-width: 1023px){.stk-5e37c1e {margin-bottom:30px !important;}}<\/style><p class=\"stk-block-text__text\">Power capacitors should not be installed in zone E1.\n\nRegardless of the location of the installation site, a capacitor that, even after the voltage has been disconnected, remains connected to a circuit within zone E1 shall be provided with a discharge circuit that discharges the capacitor to a value that is not hazardous for the hazardous area. If the discharge time is longer than 30 seconds\nthe enclosure in zone E1 shall be provided with a sign stating the time that must elapse after the voltage has been disconnected before the enclosure may be opened. <\/p><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n<div class=\"wp-block-stackable-columns stk-block-columns stk-block stk-de16c31 stk-block-background\" data-block-id=\"de16c31\"><style>.stk-de16c31 {background-color:var(--jok-sixth-color) !important;padding-top:80px !important;padding-bottom:80px !important;margin-bottom:0px !important;}.stk-de16c31:before{background-color:var(--jok-sixth-color) !important;}@media screen and (max-width: 767px){.stk-de16c31 {padding-top:60px !important;padding-bottom:60px !important;}}<\/style><div class=\"stk-row stk-inner-blocks stk-block-content stk-content-align stk-de16c31-column\">\n<div class=\"wp-block-stackable-column stk-block-column stk-column stk-block stk-a148cdb\" data-v=\"4\" data-block-id=\"a148cdb\"><style>.stk-a148cdb {max-width:1024px !important;min-width:auto !important;margin-right:auto !important;margin-left:auto !important;}@media screen and (max-width: 1023px){.stk-a148cdb {max-width:90% !important;min-width:auto !important;}}<\/style><div class=\"stk-column-wrapper stk-block-column__content stk-container stk-a148cdb-container stk--no-background stk--no-padding\"><div class=\"stk-block-content stk-inner-blocks stk-a148cdb-inner-blocks\">\n<div class=\"wp-block-stackable-columns stk-block-columns stk-block stk-64463d9\" data-block-id=\"64463d9\"><style>.stk-64463d9 {margin-bottom:30px !important;}.stk-64463d9-column{--stk-columns-spacing:0px !important;--stk-column-gap:60px !important;}@media screen and (max-width: 767px){.stk-64463d9 {margin-bottom:0px !important;}}<\/style><div class=\"stk-row stk-inner-blocks stk-block-content stk-content-align stk-64463d9-column\">\n<div class=\"wp-block-stackable-column stk-block-column stk-column stk-block stk-9dbe35c\" data-v=\"4\" data-block-id=\"9dbe35c\"><div class=\"stk-column-wrapper stk-block-column__content stk-container stk-9dbe35c-container stk--no-background stk--no-padding\"><div class=\"stk-block-content stk-inner-blocks stk-9dbe35c-inner-blocks\">\n<div class=\"wp-block-stackable-heading stk-block-heading stk-block-heading--v2 stk-block stk-ce22bf8\" id=\"elkopplare\" data-block-id=\"ce22bf8\"><h2 class=\"stk-block-heading__text\">Electrical switches<\/h2><\/div>\n\n\n\n<div class=\"wp-block-stackable-text stk-block-text stk-block stk-0b16af7\" data-block-id=\"0b16af7\"><style>@media screen and (max-width: 1023px){.stk-0b16af7 {margin-bottom:30px !important;}}<\/style><p class=\"stk-block-text__text\">Electrical switches shall have the required making and breaking capacity for the load present.\n\nThe enclosure of an electrical switch that can be remotely operated shall be interlocked with an isolator so that the enclosure cannot be opened when the switch is energized. Alternatively, the interlock may be replaced by a sign stating that the enclosure must not be opened when the switch is energized. Remote operation refers to control impulses that may be, for example, mechanical, electrical, electro-optical, pneumatic, acoustic, magnetic, or thermal.  <\/p><\/div>\n<\/div><\/div><\/div>\n\n\n\n<div class=\"wp-block-stackable-column stk-block-column stk-column stk-block stk-ed5ed1b\" data-v=\"4\" data-block-id=\"ed5ed1b\"><div class=\"stk-column-wrapper stk-block-column__content stk-container stk-ed5ed1b-container stk--no-background stk--no-padding\"><div class=\"stk-block-content stk-inner-blocks stk-ed5ed1b-inner-blocks\">\n<div class=\"wp-block-stackable-text stk-block-text stk-block stk-5fddbf8\" data-block-id=\"5fddbf8\"><style>@media screen and (max-width: 1023px){.stk-5fddbf8 {margin-bottom:30px !important;}}<\/style><p class=\"stk-block-text__text\">Electrical switches with contacts in oil shall not be used.\n\nElectrical switches for circuits in hazardous areas shall be connected in all phase conductors.\n\nFor electrical switches for electrical machines, see the heading Electrical machines.<\/p><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n<div class=\"wp-block-stackable-columns stk-block-columns stk-block stk-62fb08a stk-block-background\" data-block-id=\"62fb08a\"><style>.stk-62fb08a {background-color:#f5f5f5 !important;padding-top:80px !important;padding-bottom:80px !important;margin-bottom:0px !important;}.stk-62fb08a:before{background-color:#f5f5f5 !important;}@media screen and (max-width: 767px){.stk-62fb08a {padding-top:60px !important;padding-bottom:60px !important;}}<\/style><div class=\"stk-row stk-inner-blocks stk-block-content stk-content-align stk-62fb08a-column\">\n<div class=\"wp-block-stackable-column stk-block-column stk-column stk-block stk-2d30779\" data-v=\"4\" data-block-id=\"2d30779\"><style>.stk-2d30779 {max-width:1024px !important;min-width:auto !important;margin-right:auto !important;margin-left:auto !important;}@media screen and (max-width: 1023px){.stk-2d30779 {max-width:90% !important;min-width:auto !important;}}<\/style><div class=\"stk-column-wrapper stk-block-column__content stk-container stk-2d30779-container stk--no-background stk--no-padding\"><div class=\"stk-block-content stk-inner-blocks stk-2d30779-inner-blocks\">\n<div class=\"wp-block-stackable-columns stk-block-columns stk-block stk-324113b\" data-block-id=\"324113b\"><style>.stk-324113b {margin-bottom:30px !important;}.stk-324113b-column{--stk-columns-spacing:0px !important;--stk-column-gap:60px !important;}@media screen and (max-width: 767px){.stk-324113b {margin-bottom:0px !important;}}<\/style><div class=\"stk-row stk-inner-blocks stk-block-content stk-content-align stk-324113b-column\">\n<div class=\"wp-block-stackable-column stk-block-column stk-column stk-block stk-4a1264c\" data-v=\"4\" data-block-id=\"4a1264c\"><div class=\"stk-column-wrapper stk-block-column__content stk-container stk-4a1264c-container stk--no-background stk--no-padding\"><div class=\"stk-block-content stk-inner-blocks stk-4a1264c-inner-blocks\">\n<div class=\"wp-block-stackable-heading stk-block-heading stk-block-heading--v2 stk-block stk-a6c564a\" id=\"elvarmeapparater-for-rumsuppvarmning\" data-block-id=\"a6c564a\"><h2 class=\"stk-block-heading__text\">Electric heating appliances for space heating<\/h2><\/div>\n\n\n\n<div class=\"wp-block-stackable-text stk-block-text stk-block stk-2eadace\" data-block-id=\"2eadace\"><style>@media screen and (max-width: 1023px){.stk-2eadace {margin-bottom:30px !important;}}<\/style><p class=\"stk-block-text__text\"><strong>Electric fan heater (aerotemper)<\/strong><br\/>An electric fan heater for blowing air into zone E2 or into storage rooms that are not used continuously shall be designed and arranged as follows:<br\/><br\/>The electric fan heater shall have an explosion-protected design corresponding to Swedish standard, see SS-EN 60079-14, or be designed in accordance with the applicable requirements for an electric fan heater intended for areas with increased fire risk, see section 422.3 of the Electrical Installations Rules.<br\/><br\/>NOTE \u2013 Dehumidifiers where the electric heating element is not located in the supply air duct do not need to be designed as above.<br\/><br\/>The electric fan heater shall be permanently installed outside the hazardous area. The installation location shall be separated from the hazardous area by a wall constructed to at least fire resistance class EI 30 with a surface finish of class B-s1, d0 (previously<br\/>class I) on the side facing the electric fan heater. <br\/><br\/>The air shall be taken from a location where there is no risk that it may contain explosive substances, other combustible dust, or an explosive gas mixture. The air intake shall be fitted with a metal wire mesh with a mesh size of 6\u20138 mm. <\/p><\/div>\n<\/div><\/div><\/div>\n\n\n\n<div class=\"wp-block-stackable-column stk-block-column stk-column stk-block stk-7853918\" data-v=\"4\" data-block-id=\"7853918\"><div class=\"stk-column-wrapper stk-block-column__content stk-container stk-7853918-container stk--no-background stk--no-padding\"><div class=\"stk-block-content stk-inner-blocks stk-7853918-inner-blocks\">\n<div class=\"wp-block-stackable-text stk-block-text stk-block stk-f56e730\" data-block-id=\"f56e730\"><style>@media screen and (max-width: 1023px){.stk-f56e730 {margin-bottom:30px !important;}}<\/style><p class=\"stk-block-text__text\">The air duct between the electric fan heater and the air outlet opening shall be made of non-combustible material.<br\/><br\/>The air outlet opening shall be fitted with a damper of non-combustible material that shall close automatically when the airflow stops.<br\/><br\/>The temperature of the air discharged from the electric fan heater should not be higher than 100\u00b0<br\/><br\/><strong>Other electric heating appliance<br\/><\/strong>An electric heating appliance for use in zone E2 or in storage rooms that are not used continuously shall be permanently mounted and permanently connected, and shall be dimensioned so that the temperature of touch-accessible surfaces does not<br\/>exceed 100\u00b0C. The appliance shall have built-in overtemperature protection (fail-safe protection) that, after tripping, does not automatically re-energize the appliance. <br\/><br\/>The electric heating appliance shall be positioned so that<br\/><br\/>&#8211; heat dissipation is not impeded<br\/>&#8211; it is not covered with dust or other particulate matter<br\/>&#8211; unrelated objects are not placed on it<br\/>&#8211; it is not exposed to mechanical damage, e.g. impact from vehicles.<\/p><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n<div class=\"wp-block-stackable-columns stk-block-columns stk-block stk-01ef9cf stk-block-background\" data-block-id=\"01ef9cf\"><style>.stk-01ef9cf {background-color:#f5f5f5 !important;padding-top:80px !important;padding-bottom:80px !important;margin-bottom:0px !important;}.stk-01ef9cf:before{background-color:#f5f5f5 !important;}@media screen and (max-width: 767px){.stk-01ef9cf {padding-top:60px !important;padding-bottom:60px !important;}}<\/style><div class=\"stk-row stk-inner-blocks stk-block-content stk-content-align stk-01ef9cf-column\">\n<div class=\"wp-block-stackable-column stk-block-column stk-column stk-block stk-d0630a1\" data-v=\"4\" data-block-id=\"d0630a1\"><style>.stk-d0630a1 {max-width:1024px !important;min-width:auto !important;margin-right:auto !important;margin-left:auto !important;}@media screen and (max-width: 1023px){.stk-d0630a1 {max-width:90% !important;min-width:auto !important;}}<\/style><div class=\"stk-column-wrapper stk-block-column__content stk-container stk-d0630a1-container stk--no-background stk--no-padding\"><div class=\"stk-block-content stk-inner-blocks stk-d0630a1-inner-blocks\">\n<div class=\"wp-block-stackable-columns stk-block-columns stk-block stk-24c11ff\" data-block-id=\"24c11ff\"><style>.stk-24c11ff {margin-bottom:30px !important;}.stk-24c11ff-column{--stk-columns-spacing:0px !important;--stk-column-gap:60px !important;}@media screen and (max-width: 767px){.stk-24c11ff {margin-bottom:0px !important;}}<\/style><div class=\"stk-row stk-inner-blocks stk-block-content stk-content-align stk-24c11ff-column\">\n<div class=\"wp-block-stackable-column stk-block-column stk-column stk-block stk-a65dbb6\" data-v=\"4\" data-block-id=\"a65dbb6\"><div class=\"stk-column-wrapper stk-block-column__content stk-container stk-a65dbb6-container stk--no-background stk--no-padding\"><div class=\"stk-block-content stk-inner-blocks stk-a65dbb6-inner-blocks\">\n<div class=\"wp-block-stackable-heading stk-block-heading stk-block-heading--v2 stk-block stk-d809180\" id=\"varmekablar-och-liknande-varmeanordningar\" data-block-id=\"d809180\"><h2 class=\"stk-block-heading__text\">Heating cables and similar heating devices<\/h2><\/div>\n\n\n\n<div class=\"wp-block-stackable-text stk-block-text stk-block stk-e7eb5da\" data-block-id=\"e7eb5da\"><style>@media screen and (max-width: 1023px){.stk-e7eb5da {margin-bottom:30px !important;}}<\/style><p class=\"stk-block-text__text\">Heating cable shall be installed in accordance with SS 436 47 53 with the changes or additions stated here, which also apply to similar heating devices, e.g. heating tape and heating film.\n\nNOTE 1 \u2013 Additional instructions for the installation of heating cables in industry are provided in SS-EN 60079-30-2 and SS-EN 60519-10.\n\nThe requirements also apply to heating cable installed outside zone E1 but intended to transfer heat to zone E1, e.g. to prevent condensation in an exhaust air duct from zone E1.\n\nHeating cable shall not be installed in zone E1, zone E3, or in storage rooms.\n\nThe heating cable shall be of the self-limiting type and have a metal sheath or metal screen with or without armouring. The metal sheath or metal screen shall be protective-earthed. Any armouring present shall be connected to the equipotential bonding system, if such exists, or to the earthing electrode of the electrical installation.  \n\nSelf-limiting heating cable means a heating cable whose temperature does not exceed a specified maximum value, regardless of length and cooling conditions, when connected to a specified voltage. The self-limiting function generally means that heat is generated in a conductive resistive material embedded between two parallel conductors, and that the resistivity of the conductive resistive material varies with temperature in such a way that power output decreases as temperature increases. \n\nThe heating cable\u2019s metal sheath or metal screen shall be protected against corrosion. Corrosion protection may be achieved either by selecting a corrosion-resistant material for the metal sheath or metal screen, or by providing it with an outer sheath of insulating material. <\/p><\/div>\n<\/div><\/div><\/div>\n\n\n\n<div class=\"wp-block-stackable-column stk-block-column stk-column stk-block stk-b763d7f\" data-v=\"4\" data-block-id=\"b763d7f\"><div class=\"stk-column-wrapper stk-block-column__content stk-container stk-b763d7f-container stk--no-background stk--no-padding\"><div class=\"stk-block-content stk-inner-blocks stk-b763d7f-inner-blocks\">\n<div class=\"wp-block-stackable-text stk-block-text stk-block stk-0d734a4\" data-block-id=\"0d734a4\"><style>@media screen and (max-width: 1023px){.stk-0d734a4 {margin-bottom:30px !important;}}<\/style><p class=\"stk-block-text__text\">NOTE 2 \u2013 An outer PVC sheath generally permits a maximum operating temperature of 90\u00b0C. At higher operating temperatures, the outer sheath may consist, for example, of Teflon. \n\nInstallation and end termination\nInstallation, jointing, and end termination shall be carried out in accordance with the heating cable manufacturer\u2019s instructions and using accessories specified by the manufacturer.\nWhen jointing and end terminating, it shall be ensured that moisture cannot penetrate into the cable\u2019s insulating material.\n\nThe heating cable shall be installed so that it is not subjected to mechanical stress, e.g. if a pipeline may be subject to movement due to temperature changes.\nAt pipe joints, valves, and similar points, the heating cable shall be installed so that maintenance and repair are facilitated and can be carried out without damaging the heating cable.\n\nThe heating cable shall be connected so that the junction box and connection point are not exposed to harmful temperature.\n\nElectrical protection\nNo other loads may be connected to the group circuit for the heating cable.\n\nEach group circuit shall include a residual current device (RCD) with a rated residual operating current not exceeding 300 mA. The RCD\u2019s rated current (through current) shall be dimensioned with regard to the inrush current and the short-circuit protection. The function of the RCD shall be tested at intervals of no more than 6 months.  \n\nSigns\nIn addition to at the distribution board, a sign shall be posted at each item stating that a heating cable for power current is installed. For items of large extent, e.g. a pipeline, signs shall be provided both at pipe joints, valves\nand similar points, and along the item so that the distance between signs is no more than 25 m. At least one sign shall be provided in each room.  \n\n<\/p><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n<div class=\"wp-block-stackable-columns stk-block-columns stk-block stk-dcd4e43 stk-block-background\" data-block-id=\"dcd4e43\"><style>.stk-dcd4e43 {background-color:#ffdc2e !important;padding-top:80px !important;padding-bottom:80px !important;margin-bottom:0px !important;}.stk-dcd4e43:before{background-color:#ffdc2e !important;}@media screen and (max-width: 767px){.stk-dcd4e43 {padding-top:60px !important;padding-bottom:60px !important;}}<\/style><div class=\"stk-row stk-inner-blocks stk-block-content stk-content-align stk-dcd4e43-column\">\n<div class=\"wp-block-stackable-column stk-block-column stk-column stk-block stk-5446bbe\" data-v=\"4\" data-block-id=\"5446bbe\"><style>.stk-5446bbe {max-width:1024px !important;min-width:auto !important;margin-right:auto !important;margin-left:auto !important;}@media screen and (max-width: 1023px){.stk-5446bbe {max-width:90% !important;min-width:auto !important;}}<\/style><div class=\"stk-column-wrapper stk-block-column__content stk-container stk-5446bbe-container stk--no-background stk--no-padding\"><div class=\"stk-block-content stk-inner-blocks stk-5446bbe-inner-blocks\">\n<div class=\"wp-block-stackable-columns stk-block-columns stk-block stk-b7ca901\" data-block-id=\"b7ca901\"><style>.stk-b7ca901 {margin-bottom:30px !important;}.stk-b7ca901-column{--stk-columns-spacing:0px !important;--stk-column-gap:60px !important;}@media screen and (max-width: 767px){.stk-b7ca901 {margin-bottom:0px !important;}}<\/style><div class=\"stk-row stk-inner-blocks stk-block-content stk-content-align stk-b7ca901-column\">\n<div class=\"wp-block-stackable-column stk-block-column stk-column stk-block stk-f85d4df\" data-v=\"4\" data-block-id=\"f85d4df\"><div class=\"stk-column-wrapper stk-block-column__content stk-container stk-f85d4df-container stk--no-background stk--no-padding\"><div class=\"stk-block-content stk-inner-blocks stk-f85d4df-inner-blocks\">\n<div class=\"wp-block-stackable-heading stk-block-heading stk-block-heading--v2 stk-block stk-21ff01b\" id=\"strong-sakringar-strong\" data-block-id=\"21ff01b\"><h3 class=\"stk-block-heading__text\"><strong>Fuses<\/strong><\/h3><\/div>\n\n\n\n<div class=\"wp-block-stackable-text stk-block-text stk-block stk-acdfd1e\" data-block-id=\"acdfd1e\"><style>@media screen and (max-width: 1023px){.stk-acdfd1e {margin-bottom:30px !important;}}<\/style><p class=\"stk-block-text__text\">Fuses for the fixed installation should be avoided in zone E1. Fuses in industrial machines and similar equipment located in zone E1 may be inserted and removed only when de-energized. To meet this requirement, one of the following designs may be selected:  <br\/><br\/>&#8211; the enclosure in which the fuses are located shall be interlocked so that the fuses are accessible only when de-energized, and so that they become energized again only when the enclosure is correctly closed<br\/>&#8211; the enclosure in which the fuses are located shall be fitted with a sign stating that the fuses must be de-energized with an electrical switch before fuses are replaced. In this case, the electrical switch shall be located next to the enclosure. The enclosure\u2019s sign shall clearly indicate which electrical switch is referred to.  <br\/><br\/>As a first choice, fuses should be used that make replacement with a fuse of excessively high rated current more difficult. If miniature circuit breakers are not used, the fuse size shall be stated at the fuse location. Only fuses clearly marked<br\/>with rated current may be used.  <\/p><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n<div class=\"wp-block-stackable-columns stk-block-columns stk-block stk-bb9b541 stk-block-background\" data-block-id=\"bb9b541\"><style>.stk-bb9b541 {background-color:#f5f5f5 !important;padding-top:80px !important;padding-bottom:80px !important;margin-bottom:0px !important;}.stk-bb9b541:before{background-color:#f5f5f5 !important;}@media screen and (max-width: 767px){.stk-bb9b541 {padding-top:60px !important;padding-bottom:60px !important;}}<\/style><div class=\"stk-row stk-inner-blocks stk-block-content stk-content-align stk-bb9b541-column\">\n<div class=\"wp-block-stackable-column stk-block-column stk-column stk-block stk-6d0f37a\" data-v=\"4\" data-block-id=\"6d0f37a\"><style>.stk-6d0f37a {max-width:1024px !important;min-width:auto !important;margin-right:auto !important;margin-left:auto !important;}@media screen and (max-width: 1023px){.stk-6d0f37a {max-width:90% !important;min-width:auto !important;}}<\/style><div class=\"stk-column-wrapper stk-block-column__content stk-container stk-6d0f37a-container stk--no-background stk--no-padding\"><div class=\"stk-block-content stk-inner-blocks stk-6d0f37a-inner-blocks\">\n<div class=\"wp-block-stackable-columns stk-block-columns stk-block stk-69e9843\" data-block-id=\"69e9843\"><style>.stk-69e9843 {margin-bottom:30px !important;}.stk-69e9843-column{--stk-columns-spacing:0px !important;--stk-column-gap:60px !important;}@media screen and (max-width: 767px){.stk-69e9843 {margin-bottom:0px !important;}}<\/style><div class=\"stk-row stk-inner-blocks stk-block-content stk-content-align stk-69e9843-column\">\n<div class=\"wp-block-stackable-column stk-block-column stk-column stk-block stk-e04fec2\" data-v=\"4\" data-block-id=\"e04fec2\"><div class=\"stk-column-wrapper stk-block-column__content stk-container stk-e04fec2-container stk--no-background stk--no-padding\"><div class=\"stk-block-content stk-inner-blocks stk-e04fec2-inner-blocks\">\n<div class=\"wp-block-stackable-heading stk-block-heading stk-block-heading--v2 stk-block stk-169724f\" id=\"anslutningsdon\" data-block-id=\"169724f\"><style>.stk-169724f {margin-bottom:30px !important;}.stk-169724f .stk-block-heading__text{font-size:26px !important;}@media screen and (max-width: 1023px){.stk-169724f .stk-block-heading__text{font-size:26px !important;}}<\/style><h2 class=\"stk-block-heading__text\">Plugs and socket-outlets<\/h2><\/div>\n\n\n\n<div class=\"wp-block-stackable-text stk-block-text stk-block stk-d5530cf\" data-block-id=\"d5530cf\"><style>@media screen and (max-width: 1023px){.stk-d5530cf {margin-bottom:30px !important;}}<\/style><p class=\"stk-block-text__text\">Plugs and socket-outlets in zone E1 for connection of permanently installed electrical equipment fitted with an inlet are permitted only for operating currents not exceeding 1 A. They shall be provided with a mechanical lock that can be removed only with the aid of a tool and that prevents the devices from being removed unless the lock is removed. Other socket-outlets and plugs are not permitted in zone E1. \n\nPlugs and socket-outlets in zone E2 for connection of permanently installed electrical equipment fitted with an inlet shall be provided with a mechanical lock as above<\/p><\/div>\n<\/div><\/div><\/div>\n\n\n\n<div class=\"wp-block-stackable-column stk-block-column stk-column stk-block stk-1febddc\" data-v=\"4\" data-block-id=\"1febddc\"><div class=\"stk-column-wrapper stk-block-column__content stk-container stk-1febddc-container stk--no-background stk--no-padding\"><div class=\"stk-block-content stk-inner-blocks stk-1febddc-inner-blocks\">\n<div class=\"wp-block-stackable-text stk-block-text stk-block stk-4ccf082\" data-block-id=\"4ccf082\"><style>@media screen and (max-width: 1023px){.stk-4ccf082 {margin-bottom:30px !important;}}<\/style><p class=\"stk-block-text__text\">Permanently installed socket-outlets in zone E2 and zone E3 protected by a fuse or equivalent overcurrent protection with a higher rated current than 16 A shall be blocked.\n\nAt socket-outlets in zone E2 and zone E3, a notice shall be posted stating that the connection of appliances other than those permitted for use in the respective zone is prohibited<\/p><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n<div class=\"wp-block-stackable-columns stk-block-columns stk-block stk-c475e44 stk-block-background\" data-block-id=\"c475e44\"><style>.stk-c475e44 {background-color:#f5f5f5 !important;padding-top:80px !important;padding-bottom:80px !important;margin-bottom:0px !important;}.stk-c475e44:before{background-color:#f5f5f5 !important;}@media screen and (max-width: 767px){.stk-c475e44 {padding-top:60px !important;padding-bottom:60px !important;}}<\/style><div class=\"stk-row stk-inner-blocks stk-block-content stk-content-align stk-c475e44-column\">\n<div class=\"wp-block-stackable-column stk-block-column stk-column stk-block stk-3a300ed\" data-v=\"4\" data-block-id=\"3a300ed\"><style>.stk-3a300ed {max-width:1024px !important;min-width:auto !important;margin-right:auto !important;margin-left:auto !important;}@media screen and (max-width: 1023px){.stk-3a300ed {max-width:90% !important;min-width:auto !important;}}<\/style><div class=\"stk-column-wrapper stk-block-column__content stk-container stk-3a300ed-container stk--no-background stk--no-padding\"><div class=\"stk-block-content stk-inner-blocks stk-3a300ed-inner-blocks\">\n<div class=\"wp-block-stackable-columns stk-block-columns stk-block stk-8680f51\" data-block-id=\"8680f51\"><style>.stk-8680f51 {margin-bottom:30px !important;}.stk-8680f51-column{--stk-columns-spacing:0px !important;--stk-column-gap:60px !important;}@media screen and (max-width: 767px){.stk-8680f51 {margin-bottom:0px !important;}}<\/style><div class=\"stk-row stk-inner-blocks stk-block-content stk-content-align stk-8680f51-column\">\n<div class=\"wp-block-stackable-column stk-block-column stk-column stk-block stk-1cf5bc5\" data-v=\"4\" data-block-id=\"1cf5bc5\"><div class=\"stk-column-wrapper stk-block-column__content stk-container stk-1cf5bc5-container stk--no-background stk--no-padding\"><div class=\"stk-block-content stk-inner-blocks stk-1cf5bc5-inner-blocks\">\n<div class=\"wp-block-stackable-heading stk-block-heading stk-block-heading--v2 stk-block stk-060b05d\" id=\"ljusarmaturer-natanslutna-handlampor-signallampor\" data-block-id=\"060b05d\"><style>.stk-060b05d {margin-bottom:30px !important;}.stk-060b05d .stk-block-heading__text{font-size:26px !important;}@media screen and (max-width: 1023px){.stk-060b05d .stk-block-heading__text{font-size:26px !important;}}<\/style><h3 class=\"stk-block-heading__text\">Luminaires, mains-connected hand lamps, signal lamps<\/h3><\/div>\n\n\n\n<div class=\"wp-block-stackable-text stk-block-text stk-block stk-15fe588\" data-block-id=\"15fe588\"><style>@media screen and (max-width: 1023px){.stk-15fe588 {margin-bottom:30px !important;}}<\/style><p class=\"stk-block-text__text\">The light source shall be protected by a cover. Where there is a risk of mechanical damage, the cover shall be made of unbreakable material or fitted with a protective guard. A hand lamp shall be fitted with a protective guard unless the cover is made of unbreakable material.  \n\nThe light source shall be selected with regard to the voltage, power, frequency, and lamp size for which the item is designed or marked, so that impermissible temperature rise or other risk does not occur.\n\nNOTE \u2013 It should be noted that the specified lamp power applies only to the voltage for which the item is designed.<\/p><\/div>\n<\/div><\/div><\/div>\n\n\n\n<div class=\"wp-block-stackable-column stk-block-column stk-column stk-block stk-12af49a\" data-v=\"4\" data-block-id=\"12af49a\"><div class=\"stk-column-wrapper stk-block-column__content stk-container stk-12af49a-container stk--no-background stk--no-padding\"><div class=\"stk-block-content stk-inner-blocks stk-12af49a-inner-blocks\">\n<div class=\"wp-block-stackable-heading stk-block-heading stk-block-heading--v2 stk-block stk-4ecf0bb\" id=\"bruksforemal-med-egen-stromkalla\" data-block-id=\"4ecf0bb\"><h3 class=\"stk-block-heading__text\">Appliances with their own power source<\/h3><\/div>\n\n\n\n<div class=\"wp-block-stackable-text stk-block-text stk-block stk-3965feb\" data-block-id=\"3965feb\"><style>@media screen and (max-width: 1023px){.stk-3965feb {margin-bottom:30px !important;}}<\/style><p class=\"stk-block-text__text\">Battery replacement shall take place outside zone E1.\n\nThe light source in a hand lamp and headlamp shall be protected by a cover.<\/p><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n<div class=\"wp-block-stackable-columns stk-block-columns stk-block stk-de0516b stk-block-background\" data-block-id=\"de0516b\"><style>.stk-de0516b {background-color:#f5f5f5 !important;padding-top:80px !important;padding-bottom:80px !important;margin-bottom:0px !important;}.stk-de0516b:before{background-color:#f5f5f5 !important;}@media screen and (max-width: 767px){.stk-de0516b {padding-top:60px !important;padding-bottom:60px !important;}}<\/style><div class=\"stk-row stk-inner-blocks stk-block-content stk-content-align stk-de0516b-column\">\n<div class=\"wp-block-stackable-column stk-block-column stk-column stk-block stk-5ea751d\" data-v=\"4\" data-block-id=\"5ea751d\"><style>.stk-5ea751d {max-width:1024px !important;min-width:auto !important;margin-right:auto !important;margin-left:auto !important;}@media screen and (max-width: 1023px){.stk-5ea751d {max-width:90% !important;min-width:auto !important;}}<\/style><div class=\"stk-column-wrapper stk-block-column__content stk-container stk-5ea751d-container stk--no-background stk--no-padding\"><div class=\"stk-block-content stk-inner-blocks stk-5ea751d-inner-blocks\">\n<div class=\"wp-block-stackable-columns stk-block-columns stk-block stk-3186d14\" data-block-id=\"3186d14\"><style>.stk-3186d14 {margin-bottom:30px !important;}.stk-3186d14-column{--stk-columns-spacing:0px !important;--stk-column-gap:60px !important;}@media screen and (max-width: 767px){.stk-3186d14 {margin-bottom:0px !important;}}<\/style><div class=\"stk-row stk-inner-blocks stk-block-content stk-content-align stk-3186d14-column\">\n<div class=\"wp-block-stackable-column stk-block-column stk-column stk-block stk-3553465\" data-v=\"4\" data-block-id=\"3553465\"><div class=\"stk-column-wrapper stk-block-column__content stk-container stk-3553465-container stk--no-background stk--no-padding\"><div class=\"stk-block-content stk-inner-blocks stk-3553465-inner-blocks\">\n<div class=\"wp-block-stackable-heading stk-block-heading stk-block-heading--v2 stk-block stk-26add4b\" id=\"flyttbara-apparater\" data-block-id=\"26add4b\"><style>.stk-26add4b {margin-bottom:30px !important;}.stk-26add4b .stk-block-heading__text{font-size:26px !important;}@media screen and (max-width: 1023px){.stk-26add4b .stk-block-heading__text{font-size:26px !important;}}<\/style><h2 class=\"stk-block-heading__text\">Portable equipment<\/h2><\/div>\n\n\n\n<div class=\"wp-block-stackable-text stk-block-text stk-block stk-68c075a\" data-block-id=\"68c075a\"><style>@media screen and (max-width: 1023px){.stk-68c075a {margin-bottom:30px !important;}}<\/style><p class=\"stk-block-text__text\">Equipment that can be used alternately in different zones shall be approved for the zones in which it can be used.<\/p><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n<div class=\"wp-block-stackable-columns stk-block-columns stk-block stk-43ec0c3 stk-block-background\" data-block-id=\"43ec0c3\"><style>.stk-43ec0c3 {background-color:#f5f5f5 !important;padding-top:80px !important;padding-bottom:80px !important;margin-bottom:0px !important;}.stk-43ec0c3:before{background-color:#f5f5f5 !important;}@media screen and (max-width: 767px){.stk-43ec0c3 {padding-top:60px !important;padding-bottom:60px !important;}}<\/style><div class=\"stk-row stk-inner-blocks stk-block-content stk-content-align stk-43ec0c3-column\">\n<div class=\"wp-block-stackable-column stk-block-column stk-column stk-block stk-96d057f\" data-v=\"4\" data-block-id=\"96d057f\"><style>.stk-96d057f {max-width:1024px !important;min-width:auto !important;margin-right:auto !important;margin-left:auto !important;}@media screen and (max-width: 1023px){.stk-96d057f {max-width:90% !important;min-width:auto !important;}}<\/style><div class=\"stk-column-wrapper stk-block-column__content stk-container stk-96d057f-container stk--no-background stk--no-padding\"><div class=\"stk-block-content stk-inner-blocks stk-96d057f-inner-blocks\">\n<div class=\"wp-block-stackable-columns stk-block-columns stk-block stk-5d14d33\" data-block-id=\"5d14d33\"><style>.stk-5d14d33 {margin-bottom:30px !important;}.stk-5d14d33-column{--stk-columns-spacing:0px !important;--stk-column-gap:60px !important;}@media screen and (max-width: 767px){.stk-5d14d33 {margin-bottom:0px !important;}}<\/style><div class=\"stk-row stk-inner-blocks stk-block-content stk-content-align stk-5d14d33-column\">\n<div class=\"wp-block-stackable-column stk-block-column stk-column stk-block stk-d6ea7b8\" data-v=\"4\" data-block-id=\"d6ea7b8\"><div class=\"stk-column-wrapper stk-block-column__content stk-container stk-d6ea7b8-container stk--no-background stk--no-padding\"><div class=\"stk-block-content stk-inner-blocks stk-d6ea7b8-inner-blocks\">\n<div class=\"wp-block-stackable-heading stk-block-heading stk-block-heading--v2 stk-block stk-064f5e1\" id=\"klimatskap\" data-block-id=\"064f5e1\"><style>.stk-064f5e1 {margin-bottom:30px !important;}.stk-064f5e1 .stk-block-heading__text{font-size:26px !important;}@media screen and (max-width: 1023px){.stk-064f5e1 .stk-block-heading__text{font-size:26px !important;}}<\/style><h2 class=\"stk-block-heading__text\">Climate cabinets<\/h2><\/div>\n\n\n\n<div class=\"wp-block-stackable-text stk-block-text stk-block stk-a8c0976\" data-block-id=\"a8c0976\"><style>@media screen and (max-width: 1023px){.stk-a8c0976 {margin-bottom:30px !important;}}<\/style><p class=\"stk-block-text__text\">For climate cabinets, the other sections of this standard apply with the changes or additions stated here.\n\nA climate cabinet means a movable cabinet for drying, heating, or other conditioning treatment, with an internal storage volume of no more than 1 m3. For climate equipment with a storage volume greater than 1 m3, the other sections of this standard apply. \n\nClimate cabinets shall not be placed in zone E1. However, handling of explosive goods or explosive substances in connection with the conditioning may in itself result in zone E1 in and outside the climate cabinet\u2019s storage compartment. <\/p><\/div>\n<\/div><\/div><\/div>\n\n\n\n<div class=\"wp-block-stackable-column stk-block-column stk-column stk-block stk-d68ff44\" data-v=\"4\" data-block-id=\"d68ff44\"><div class=\"stk-column-wrapper stk-block-column__content stk-container stk-d68ff44-container stk--no-background stk--no-padding\"><div class=\"stk-block-content stk-inner-blocks stk-d68ff44-inner-blocks\">\n<div class=\"wp-block-stackable-text stk-block-text stk-block stk-ff176fb\" data-block-id=\"ff176fb\"><style>@media screen and (max-width: 1023px){.stk-ff176fb {margin-bottom:30px !important;}}<\/style><p class=\"stk-block-text__text\">The climate cabinet should preferably be permanently connected. Any inlet on the climate cabinet shall be designed in accordance with the section Plugs and socket-outlets. The connection box in the fixed installation shall be preceded by an all-pole, manually operated, mechanical electrical switch. An electrical switch shall not be present in the connection cable. On the front of the climate cabinet, or in another suitable, clearly visible location, there shall be a signal lamp indicating that voltage is applied.    \n\nThe climate cabinet shall provide such a temperature distribution in the storage compartment that local overheating is avoided<\/p><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n<div class=\"wp-block-stackable-columns stk-block-columns stk-block stk-3597796 stk-block-background\" data-block-id=\"3597796\"><style>.stk-3597796 {background-color:#f5f5f5 !important;padding-top:80px !important;padding-bottom:80px !important;margin-bottom:0px !important;}.stk-3597796:before{background-color:#f5f5f5 !important;}@media screen and (max-width: 767px){.stk-3597796 {padding-top:60px !important;padding-bottom:60px !important;}}<\/style><div class=\"stk-row stk-inner-blocks stk-block-content stk-content-align stk-3597796-column\">\n<div class=\"wp-block-stackable-column stk-block-column stk-column stk-block stk-1ef09d0\" data-v=\"4\" data-block-id=\"1ef09d0\"><style>.stk-1ef09d0 {max-width:1024px !important;min-width:auto !important;margin-right:auto !important;margin-left:auto !important;}@media screen and (max-width: 1023px){.stk-1ef09d0 {max-width:90% !important;min-width:auto !important;}}<\/style><div class=\"stk-column-wrapper stk-block-column__content stk-container stk-1ef09d0-container stk--no-background stk--no-padding\"><div class=\"stk-block-content stk-inner-blocks stk-1ef09d0-inner-blocks\">\n<div class=\"wp-block-stackable-columns stk-block-columns stk-block stk-b15c4f0\" data-block-id=\"b15c4f0\"><style>.stk-b15c4f0 {margin-bottom:30px !important;}.stk-b15c4f0-column{--stk-columns-spacing:0px !important;--stk-column-gap:60px !important;}@media screen and (max-width: 767px){.stk-b15c4f0 {margin-bottom:0px !important;}}<\/style><div class=\"stk-row stk-inner-blocks stk-block-content stk-content-align stk-b15c4f0-column\">\n<div class=\"wp-block-stackable-column stk-block-column stk-column stk-block stk-bc358c3\" data-v=\"4\" data-block-id=\"bc358c3\"><div class=\"stk-column-wrapper stk-block-column__content stk-container stk-bc358c3-container stk--no-background stk--no-padding\"><div class=\"stk-block-content stk-inner-blocks stk-bc358c3-inner-blocks\">\n<div class=\"wp-block-stackable-heading stk-block-heading stk-block-heading--v2 stk-block stk-204006b\" id=\"temperaturovervakning\" data-block-id=\"204006b\"><style>.stk-204006b {margin-bottom:30px !important;}.stk-204006b .stk-block-heading__text{font-size:26px !important;}@media screen and (max-width: 1023px){.stk-204006b .stk-block-heading__text{font-size:26px !important;}}<\/style><h2 class=\"stk-block-heading__text\">Temperature monitoring<\/h2><\/div>\n\n\n\n<div class=\"wp-block-stackable-text stk-block-text stk-block stk-b4796c2\" data-block-id=\"b4796c2\"><style>@media screen and (max-width: 1023px){.stk-b4796c2 {margin-bottom:30px !important;}}<\/style><p class=\"stk-block-text__text\">The climate cabinet shall be fitted with an operating control device, e.g. an operating thermostat, that does not permit a higher setting of the working temperature than corresponds to half the ignition temperature (in \u00b0C) of the explosive substance for which\nthe climate cabinet is intended. The operating control device shall provide a temperature setting accuracy of at least \u00b12 K. \n\nThe climate cabinet shall have an externally easily readable thermometer indicating the temperature at the hottest point in the storage compartment. The thermometer shall not be placed on the door of the storage compartment. \n\nA temperature limiter (fail-safe protection) shall be provided that gives an alarm and automatically disconnects the heat source at no more than 15 K above the working temperature set at any given time.\n\nThe temperature limiter shall, where possible, be connected in the main circuit. If the temperature limiter is placed in the control circuit, it shall actuate a separate switching device in the main circuit. <\/p><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n<div class=\"wp-block-stackable-columns stk-block-columns stk-block stk-164fb30 stk-block-background\" data-block-id=\"164fb30\"><style>.stk-164fb30 {background-color:#f5f5f5 !important;padding-top:80px !important;padding-bottom:80px !important;margin-bottom:0px !important;}.stk-164fb30:before{background-color:#f5f5f5 !important;}@media screen and (max-width: 767px){.stk-164fb30 {padding-top:60px !important;padding-bottom:60px !important;}}<\/style><div class=\"stk-row stk-inner-blocks stk-block-content stk-content-align stk-164fb30-column\">\n<div class=\"wp-block-stackable-column stk-block-column stk-column stk-block stk-e132db4\" data-v=\"4\" data-block-id=\"e132db4\"><style>.stk-e132db4 {max-width:1024px !important;min-width:auto !important;margin-right:auto !important;margin-left:auto !important;}@media screen and (max-width: 1023px){.stk-e132db4 {max-width:90% !important;min-width:auto !important;}}<\/style><div class=\"stk-column-wrapper stk-block-column__content stk-container stk-e132db4-container stk--no-background stk--no-padding\"><div class=\"stk-block-content stk-inner-blocks stk-e132db4-inner-blocks\">\n<div class=\"wp-block-stackable-columns stk-block-columns stk-block stk-8855626\" data-block-id=\"8855626\"><style>.stk-8855626 {margin-bottom:30px !important;}.stk-8855626-column{--stk-columns-spacing:0px !important;--stk-column-gap:60px !important;}@media screen and (max-width: 767px){.stk-8855626 {margin-bottom:0px !important;}}<\/style><div class=\"stk-row stk-inner-blocks stk-block-content stk-content-align stk-8855626-column\">\n<div class=\"wp-block-stackable-column stk-block-column stk-column stk-block stk-e13bd6e\" data-v=\"4\" data-block-id=\"e13bd6e\"><div class=\"stk-column-wrapper stk-block-column__content stk-container stk-e13bd6e-container stk--no-background stk--no-padding\"><div class=\"stk-block-content stk-inner-blocks stk-e13bd6e-inner-blocks\">\n<div class=\"wp-block-stackable-heading stk-block-heading stk-block-heading--v2 stk-block stk-ab15ca9\" id=\"utforande-av-reglerorgan-och-reglerkretsar\" data-block-id=\"ab15ca9\"><style>.stk-ab15ca9 {margin-bottom:30px !important;}.stk-ab15ca9 .stk-block-heading__text{font-size:26px !important;}@media screen and (max-width: 1023px){.stk-ab15ca9 .stk-block-heading__text{font-size:26px !important;}}<\/style><h3 class=\"stk-block-heading__text\">Design of control devices and control circuits<\/h3><\/div>\n\n\n\n<div class=\"wp-block-stackable-text stk-block-text stk-block stk-0f69677\" data-block-id=\"0f69677\"><style>@media screen and (max-width: 1023px){.stk-0f69677 {margin-bottom:30px !important;}}<\/style><p class=\"stk-block-text__text\">The operating control device and temperature limiter shall be protected against mechanical damage and unauthorized changes to the set value. The temperature limiter shall either be located in a space accessible only with\nthe aid of a tool or key, be sealable, or be otherwise protected in a reliable manner. \n\nA tripped temperature limiter shall not automatically re-energize the heat source.\nThe circuit for the temperature limiter shall be independent of the circuit for the operating control device.\n\nControl circuits may contain only switching and making devices, e.g. hermetically sealed mercury or reed contacts, that do not produce open sparks when breaking or making the circuit.<\/p><\/div>\n<\/div><\/div><\/div>\n\n\n\n<div class=\"wp-block-stackable-column stk-block-column stk-column stk-block stk-8700cf1\" data-v=\"4\" data-block-id=\"8700cf1\"><div class=\"stk-column-wrapper stk-block-column__content stk-container stk-8700cf1-container stk--no-background stk--no-padding\"><div class=\"stk-block-content stk-inner-blocks stk-8700cf1-inner-blocks\">\n<div class=\"wp-block-stackable-heading stk-block-heading stk-block-heading--v2 stk-block stk-3fc118d\" id=\"ventilation\" data-block-id=\"3fc118d\"><h3 class=\"stk-block-heading__text\">Ventilation<\/h3><\/div>\n\n\n\n<div class=\"wp-block-stackable-text stk-block-text stk-block stk-5403c8c\" data-block-id=\"5403c8c\"><p class=\"stk-block-text__text\">For climate cabinets with natural ventilation, the electric heat source shall be designed and positioned so that dust, vapour, condensate, or sublimate from explosive substances cannot be deposited on it.<br\/><br\/>For climate cabinets with mechanical ventilation, only fresh air may be used. Fresh air shall be taken from a location that cannot contain dust, vapour, condensate, or sublimate from explosive substances. The electric heat source shall only be able to be energized when the mechanical ventilation is operating.  <\/p><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n<div class=\"wp-block-stackable-columns stk-block-columns stk-block stk-ae3776a stk-block-background\" data-block-id=\"ae3776a\"><style>.stk-ae3776a {background-color:#f5f5f5 !important;padding-top:80px !important;padding-bottom:80px !important;margin-bottom:0px !important;}.stk-ae3776a:before{background-color:#f5f5f5 !important;}@media screen and (max-width: 767px){.stk-ae3776a {padding-top:60px !important;padding-bottom:60px !important;}}<\/style><div class=\"stk-row stk-inner-blocks stk-block-content stk-content-align stk-ae3776a-column\">\n<div class=\"wp-block-stackable-column stk-block-column stk-column stk-block stk-dd9beb2\" data-v=\"4\" data-block-id=\"dd9beb2\"><style>.stk-dd9beb2 {max-width:1024px !important;min-width:auto !important;margin-right:auto !important;margin-left:auto !important;}@media screen and (max-width: 1023px){.stk-dd9beb2 {max-width:90% !important;min-width:auto !important;}}<\/style><div class=\"stk-column-wrapper stk-block-column__content stk-container stk-dd9beb2-container stk--no-background stk--no-padding\"><div class=\"stk-block-content stk-inner-blocks stk-dd9beb2-inner-blocks\">\n<div class=\"wp-block-stackable-columns stk-block-columns stk-block stk-2d51515\" data-block-id=\"2d51515\"><style>.stk-2d51515 {margin-bottom:30px !important;}.stk-2d51515-column{--stk-columns-spacing:0px !important;--stk-column-gap:60px !important;}@media screen and (max-width: 767px){.stk-2d51515 {margin-bottom:0px !important;}}<\/style><div class=\"stk-row stk-inner-blocks stk-block-content stk-content-align stk-2d51515-column\">\n<div class=\"wp-block-stackable-column stk-block-column stk-column stk-block stk-2fafc88\" data-v=\"4\" data-block-id=\"2fafc88\"><div class=\"stk-column-wrapper stk-block-column__content stk-container stk-2fafc88-container stk--no-background stk--no-padding\"><div class=\"stk-block-content stk-inner-blocks stk-2fafc88-inner-blocks\">\n<div class=\"wp-block-stackable-text stk-block-text stk-block stk-6aa396a\" data-block-id=\"6aa396a\"><style>@media screen and (max-width: 1023px){.stk-6aa396a {margin-bottom:30px !important;}}<\/style><p class=\"stk-block-text__text\"><br\/><br\/>SEK Swedish Electrotechnical Standard<\/p><\/div>\n<\/div><\/div><\/div>\n\n\n\n<div class=\"wp-block-stackable-column stk-block-column stk-column stk-block stk-3370513\" data-v=\"4\" data-block-id=\"3370513\"><div class=\"stk-column-wrapper stk-block-column__content stk-container stk-3370513-container stk--no-background stk--no-padding\"><div class=\"stk-block-content stk-inner-blocks stk-3370513-inner-blocks\"><\/div><\/div><\/div>\n<\/div><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n","protected":false},"excerpt":{"rendered":"<p>SEK Swedish Electrotechnical Standard<\/p>\n","protected":false},"featured_media":8031,"template":"","meta":{"_acf_changed":false},"kunskapsbankskategori":[240],"class_list":["post-8030","kunskapsbankinlagg","type-kunskapsbankinlagg","status-publish","has-post-thumbnail","hentry","kunskapsbankskategori-ex-industry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.7 - 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