Class 1 Division 1 Electrical Requirements

Electrical equipment installed in such locations could provide an ignition source due to electrical arcing or high temperature.

Class 1 division 1 electrical requirements.

You ll find that in open areas the class 1 division 1 area is limited to a distance 5 from the source. 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. National electrical code nfpa 70 chapter 5 article 500. 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.

Class i division 2 group d. 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. If a wiring method is allowed for div. 1 fittings and flexible cords used in class i div.

1 areas must be listed for class i div. Zone 2 group iia. In electrical and safety engineering hazardous locations hazloc pronounced haz lōk are places where fire or explosion hazards may exist. Can i use a piece of equipment approved for use in a division 1 hazardous location in a division 2 hazardous location.

No other aspect of industrial safety receives more attention in the form of codes standards technical papers and engineering design. All applicable requirements in this subpart apply to all hazardous classified locations unless modified by provisions of this section. Recommended reading for this topic. Class i division 1 class i division 2 class ii division 1 class ii division 2 class iii division 1 class iii division 2.

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 i zone 0 or zone 1 locations may not abut class i division 1 or division 2 locations. 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. Sources of such hazards include gases vapors dust fibers and flyings which are combustible or flammable.

For definitions of these locations see 1926 449. 29 cfr 1910 subpart s electrical 1910 307. There are four general differences in wiring method requirements for div. 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.

1 it s also allowed for div. Protection techniques for hazardous areas north america.