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Wire color correction?

Wire color correction?

Wire color correction?

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:


RE: Wire color correction?

Based on NFPA 79, - 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.

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