Flexible Cords Used in Class I Locations

March 18, 2014
NEC rules for flexible cords used in Class I Locations

In Division 1 or Division 2 locations where the boxes, fittings, or enclosures are required to be explosionproof, if a flexible cord is used it must terminate with a cord connector or attachment plug listed for the location, or a cord connector or attachment plug with a seal that is listed for the location. In Division 2 locations, where explosionproof equipment is not required, the cord can terminate _____.

a) with a listed cord connector
b) with a listed attachment plug
c) in a splice of any manner
d) a or b

See answer and applicable Code reference

The correct answer is: d) a or b

Article 501 focuses on Class I Locations. Section 501.140 contains the requirements for Flexible Cords, Class I, Divisions 1 and 2.

As per 501.140(B)(4), the flexible cord shall be terminated with a cord connector or attachment plug listed for the location, or a cord connector installed with a seal listed for the location.

Voice your opinion!

To join the conversation, and become an exclusive member of EC&M, create an account today!

Sponsored Recommendations

Electrical Conduit Comparison Chart

CHAMPION FIBERGLASS electrical conduit is a lightweight, durable option that provides lasting savings when compared to other materials. Compare electrical conduit types including...

Considerations for Direct Burial Conduit

Installation type plays a key role in the type of conduit selected for electrical systems in industrial construction projects. Above ground, below ground, direct buried, encased...

How to Calculate Labor Costs

Most important to accurately estimating labor costs is knowing the approximate hours required for project completion. Learn how to calculate electrical labor cost.

8 Types of Electrical Conduit and Their Uses

Electrical conduit is a tube or raceway used to house and protect electrical wires within a building or structure. From data centers to underground subways to ports and bridges...