Class 1 Division 1 Electrical Installation

The 2011 revision adds cross references for types mc cable 501 10 a 1 c and itc er itc was previously included cable 501 10 b 1 4.

Class 1 division 1 electrical installation.

Recommended reading for this topic. Where embedded electrical products are concerned the requirement for harsh environment industries such as oil and gas will usually be certification to class 1 division 2 and or atex zone 2. Locations that would be considered to be class i include petroleum refineries gasoline storage areas dry cleaning plants spray finishing. Sources of such hazards include gases vapors dust fibers and flyings which are combustible or flammable.

1 fittings and flexible cords used in class i div. Class i division 2 group d. And class i zone 0. There are four general differences in wiring method requirements for div.

Trust our team of licensed and certified electricians with years of installation experience and expertise to ensure your electrical systems are up to code and. Zone 0 1 2. Class ii division 1. If a wiring method is allowed for div.

Assured systems offer a comprehensive range of class 1 division 2 and or atex zone 2 qualified products including panel pcs embedded computers data. Electrical equipment installed in such locations could provide an ignition source due to electrical arcing or high temperature. All work in class i division 1 and division 2 locations is completed and installed per nfpa 70 national electrical code nec as well as all other applicable codes and standards. One of the following three situations must exist in order for an area to be considered a class ii division 1 location.

Where combustible dust is present in the air under normal operating conditions in such a quantity as to produce explosive or ignitable mixtures. In electrical and safety engineering hazardous locations hazloc pronounced haz lōk are places where fire or explosion hazards may exist. National electrical code nfpa 70 chapter 5 article 500. Zone 2 group iia.

There are two different divisions that exist in class i division 1 and division 2 along with three zones. Class i ii and iii division 1 and 2 nec article 500. Protection techniques for hazardous areas north america. Article 501 contains the actual class i division 1 and division 2 installation requirements including wiring methods seals and specific equipment requirements.

1 areas must be listed for class i div. New cross references for class i. Class i locations consist of areas where gases vapors or liquids may exist that have the potential to become flammable or ignitable.