×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Contact US

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!

*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

Wire color correction?

Wire color correction?

Wire color correction?

(OP)
Our sub-supplier has used incorrect wire colors (size AWG #12) for 24 VDC relay control circuits - red/white instead of blue (as per NFPA 79). Unfortunately, this was not caught during acceptance, and the large piece of equipment was shipped overseas to the end user, where the incompliance was discovered. Is there any "legal" way to re-identify wire colors to blue color without a massive wire replacement effort? A reference to supporting documents would be greatly appreciated.

RE: Wire color correction?

Is using blue heat shrink an option? I don't know where it's officially written but I know it's not unheard of to heatshrink a new colour over an existing wire to make something compliant.

For example, have a look at the product description of this product, which talks about such a use:

http://int.rsdelivers.com/product/te-connectivity/...

RE: Wire color correction?

Based on NFPA 79, 14.2.4.3(3) - I think you're stuck with it. I don't see that this error meets any of the exceptions.

Question is - Does your overseas "end-user" mandate the equipment be built to NFPA 79? We all know the insulation color will not interfere with the operation of the equipment. I'd check with them to see if a placard posted permanently with the conductor color code used would suffice.

Another question - Did your sub-supplier know the NFPA 79 spec? He may be the one liable for costs associated with the corrective action chosen. Unless, your QA signed off on this and accepted it. If this is the case, the QA department needs to get their stuff together and not allow this to happen.

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! Already a Member? Login



News


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