Objectionable current

Dec. 1, 2001
New in the 2002 NEC is Section 630.15 Grounding of Welder Secondary Circuit. The secondary circuit conductors of an arc welder, consisting of the electrode conductor and the work conductor, cannot be considered as premises wiring for the purpose of applying grounding rules in Article 250. FPN: Connecting welder secondary circuits to grounded objects can create parallel paths and can cause objectionable

New in the 2002 NEC is Section 630.15 Grounding of Welder Secondary Circuit. The secondary circuit conductors of an arc welder, consisting of the electrode conductor and the work conductor, cannot be considered as premises wiring for the purpose of applying grounding rules in Article 250. FPN: Connecting welder secondary circuits to grounded objects can create parallel paths and can cause objectionable current over equipment grounding conductors. Finally, there is some recognition of what may be considered as “objectionable current.” See 250.6, Objectionable Current over Grounding Conductors.

About the Author

Joseph A. Tedesco

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.