Class 1 Division 1 Electrical Equipment

1 areas must be listed for class i div.

Class 1 division 1 electrical equipment.

Division probability of hazardous material. Can i use a piece of equipment approved for use in a division 1 hazardous location in a division 2 hazardous location. Because of repair maintenance or leakage. 100 of the national electrical code nec.

If equipment has been approved for use in a division 1 hazardous location it can be used in a division 2 hazardous location providing it is in the same class and group. Rule 18 202 rigid metal conduit hazardous location cables explosion proof or flame proof d boxes and fittings with threaded connection to conduit and cable glands shall be used for wiring in zone 21. For definitions of these locations see 1926 449. The electrical apparatus must be capable of withstanding an explosion within it.

If a wiring method is allowed for div. Under normal operating conditions 2. Locations that would be considered to be class i include petroleum refineries gasoline storage areas dry cleaning plants spray finishing. All applicable requirements in this subpart apply to all hazardous classified locations unless modified by provisions of this section.

A class i division 1 or division 2 location may be reclassified as a class i zone 0 zone 1 or zone 2 location only if all of the space that is classified because of a single flammable gas or vapor source is reclassified. 1 it s also allowed for div. Low ambient conditions require special consideration. There are two different divisions that exist in class i division 1 and division 2 along with three zones.

Electrical equipment installed in such locations could provide an ignition source due to electrical arcing or high temperature. In electrical and safety engineering hazardous locations hazloc pronounced haz lōk are places where fire or explosion hazards may exist. Class i division 1 class i division 2 class ii division 1 class ii division 2 class iii division 1 class iii division 2. 1 fittings and flexible cords used in class i div.

Note to paragraph g 4 of this section. There are four general differences in wiring method requirements for div. Sources of such hazards include gases vapors dust fibers and flyings which are combustible or flammable. The substance referred to by class has a high probability of producing an explosive or ignitable mixture due to it being present continuously intermittently or periodically or from the equipment itself under normal operating conditions.

Zone 0 1 2. Class 1 division 1 defines a specific hazardous location in which ignitible flammable gases or vapors exist. Or breakdown or faulty operation of equipment which causes them to become a source of ignition.