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    pgray317's Avatar
    pgray317 Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Apr 20, 2008, 07:13 PM
    Underground conduit installation
    Can aluminum rigid coduit be used below ground for a 40 amp./240vac branch circuit to service air condition compressor outside a residential dwelling in NYC
    stanfortyman's Avatar
    stanfortyman Posts: 5,598, Reputation: 279
    Electrical & Lighting Expert
    		  
    #2

    Apr 21, 2008, 04:10 AM
    How far underground could you possible have to go to a condenser?? How are the line sets run? Can't you mount a disconnect on the house and use sealtite following the line set?

    To answer your question, yes, but care must be taken if concrete is involved. Any time AL conduit is put in a corrosive environment it must be protected from it.
    Stratmando's Avatar
    Stratmando Posts: 11,188, Reputation: 508
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    #3

    Apr 21, 2008, 08:38 AM
    Personally I would use PVC, I have seen problems with Aluminum conduit underground, However we are in a Salt environment.
    stanfortyman's Avatar
    stanfortyman Posts: 5,598, Reputation: 279
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    #4

    Apr 21, 2008, 01:56 PM
    Quote Originally Posted by Stratmando
    Personally I would use PVC, I have seen problems with Aluminum conduit underground, However we are in a Salt environment.
    Oh, I totally agree. NYC and LI are also quite salty environments.
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