Class 1 Division 1 Electrical Requirements

The class 1 division 2 area is limited to a distance of 10 from the source.

Class 1 division 1 electrical requirements.

Class 1 div 2 groups a b c and d for enclosure cooling systems posted on august 20 2020 september 17 2020 by barry slotnick when you are working with hazardous materials it is important to know exactly how the materials and compounds are classified. 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. There are four general differences in wiring method requirements for div. Can i use a piece of equipment approved for use in a division 1 hazardous location in a division 2 hazardous location.

Protection techniques for hazardous areas north america. 1 it s also allowed for div. If a wiring method is allowed for div. Understanding the nec hazardous location option.

Tefc totally enclosed fan cooled motors and odp open drip proof motors can be used in division 2 locations provided they do not have ignition sources. In electrical and safety engineering hazardous locations hazloc pronounced haz lōk are places where fire or explosion hazards may exist. Electrical equipment installed in such locations could provide an ignition source due to electrical arcing or high temperature. In any case you don t want to make the determination as to where the class 1 division 1 area ends and the class 1 division 2 area ends.

1910 307 g 4 iii 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. National electrical code nfpa 70 chapter 5 article 500. All applicable requirements in this subpart apply to all hazardous classified locations unless modified by provisions of this section. 29 cfr 1910 subpart s electrical 1910 307.

Class i zone 0 or zone 1 locations may not abut class i division 1 or division 2 locations. An explosion proof motor certified for use in a class i division 1 location may also be operated in a class i division 2 area provided the motor meets the group and t code requirements. Class division hazardous location 33 introduction a major safety concern in industrial plants is the occurrence of fires and explosions. 1 areas must be listed for class i div.

Class i division 1 class i division 2 class ii division 1 class ii division 2 class iii division 1 class iii division 2. You ll find that in open areas the class 1 division 1 area is limited to a distance 5 from the source. 1 fittings and flexible cords used in class i div. Sources of such hazards include gases vapors dust fibers and flyings which are combustible or flammable.

Zone 2 group iia. Recommended reading for this topic.