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  1. #1
    Join Date
    Mar 2007
    Knoxville, TN

    Default Blue copper wires

    New construction today. Opened the main panel and first thing I saw was all of the exposed copper I can see has a blue tint to it. On the main lugs it is very faint, but the grounds and neutrals are very dark blue, plus the #4 copper (ground) was blue also. Looking up toward where the wires enter the panel, I can see nice fresh copper, but most everyrthing else is blue.

    No signs of melting or arcing in the panel , on the wire insulation, or on the breakers.

    Any ideas of what may have caused this? I know how I'm reporting it, but I'm curious as to what caused it.

    Similar Threads:
    Inspection Referral

  2. #2
    Join Date
    Mar 2007
    Fletcher, NC

    Default Re: Blue copper wires

    Most like a neutral or ground problem in the service or at the transformer.

    Jerry Peck
    Construction/Litigation/Code Consultant - Retired


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