Location of Sealing Fitting in Class I, Division 1 Location

June 26, 2014
Article 501 outlines the requirements for electrical and electronic equipment and wiring in Class I, Division 1 and 2 locations.

A sealing fitting shall be installed within _____ of either side of the boundary where a conduit leaves a Class I, Division 1 location.

a) 5 ft
b) 6 ft
c) 8 ft
d) 10 ft

See answer and applicable Code reference

The correct answer is: d) 10 ft

Article 501 outlines the requirements for electrical and electronic equipment and wiring in Class I, Division 1 and 2 locations. As noted in a portion of 501.15(A)(4), "The sealing fitting shall be permitted on either side of the boundary of such location within 10 ft of the boundary and shall be designed and installed so as to minimize the amount of gas or vapor within the Division 1 portion of the conduit from being communicated to the conduit beyond the seal."

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...

Don't Let Burn-Through Threaten Another Data Center or Utility Project

Get the No Burn-Through Elbow eGuide to learn many reasons why Champion Fiberglass elbows will enhance your data center and utility projects today.

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.