Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here


NFPA 79 - Testing and Verification

NFPA 79 - Testing and Verification

NFPA 79 - Testing and Verification


As part of our machine commissioning at my company we perform Hi-Pot and IR testing on our machines. I have been taught to always bypass any electrical components that have a UL or CE mark. The reason being these items were already tested at their factory. Since we use all UL or CE marked components I am pretty much just testing the wire internal to our control cabinets and through conduit runs. I am just curious
if others do the same.

Also, Does anyone know of a training course in regards to NFPA 79 chapter 18?



RE: NFPA 79 - Testing and Verification

The main reason for bypassing the previously tested components is that if they have active protection then they may give a false positive (fail) on your test; the specifications for those parts may provide more detail if you are interested.

This is standard practice.

As you said, you are "testing the wire internal to our control cabinets and through conduit runs" because that is what has never been tested.


Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close