Code Q&A: Wiring Methods Allowed in Hazardous Locations

NEC wiring methods permitted in a Class I, Div. 1 location

Q. What wiring methods does the NEC permit in a Class I, Div. 1 location?

Find the Answer

A. Only the following wiring methods are permitted in a Class I, Div. 1 location [501.10(A)]:

(a) Threaded rigid metal conduit (RMC) or intermediate metal conduit (IMC) with explosionproof fittings.

(b) Mineral insulated (MI) cable terminated with fittings listed for the location.

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