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

    Mar 5, 2009, 04:05 PM
    Wire size for 100 amp 3 phase circuit
    I am installing a commercial convection oven rated as follows: 220V 3 Phase. The oven pulls 23 kilowatts. I calculate this to be about 64 maximum amps. So, I'll use a dual pole GE 100 amp breaker in my box. The wire run will be about 15 feet through conduit. I'm getting conflicting reports on the wire size I need. Am I correct to use #2 stranded copper for the hots and neutral, and # 6 or 8 for the ground? Also, I'm guessing that my only connection options are split connectors and a lot of tape? Are there junction boxes available that have "terminal strips" of sorts to connect the 'line and load" sides into? Thanks in advance. rmwac
    stanfortyman's Avatar
    stanfortyman Posts: 5,598, Reputation: 279
    Electrical & Lighting Expert
    		  
    #2

    Mar 5, 2009, 04:31 PM
    Are you an electrician? This is not a DIY job you are looking at.

    Is the oven 208V or 240v? There is no such thing as "220" anymore.
    What is the service, 120/208v or 120/240v?
    Are you aware that 120/240v 3 phase has a high leg?

    How are you going to make a 2-pole breaker work fro 3-phase??

    I get 55.5 amps at 240v 3-phase.
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