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    Lakerfan1958's Avatar
    Lakerfan1958 Posts: 1, Reputation: 1
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    #1

    Apr 15, 2012, 09:21 AM
    220V wire size (80 ft length)
    I've been reading these thread and already have a wealth of information. Thank you
    Basic Info:
    I have a bridgeport mill, and DoAll band saw. Both of which are 220 3phase.
    I'm going to have a rotary phase converter to supply the 3 phase.
    The Saw has 3hp & Instant Amps 28 (prob for he blade welder) and normal amps 6
    The mill has 2hp & 7.1 amps.
    The line I need to run to these machines is approximately 80 feet from the Main Panel.
    I'm installing a 40 amp breaker at the panel and running #6 wire the 80 ft from it.
    From there a shut off switch --> rotary cenverter--> on-off-on switch to each machine.

    And the questions are:
    Is this wire size adequate?
    Do I need another Breaker before the converter? Or after?

    Thanks in advance
    Richard

    Location is Los Angeles area
    hfcarson's Avatar
    hfcarson Posts: 1,003, Reputation: 49
    Ultra Member
    		  
    #2

    Apr 16, 2012, 04:07 AM
    Richard,
    Wire Size? - I would consult the phase converter manufacturer for this as they do list breaker sizes based on load and converter size.
    Another Breaker? - I would recommend a fused disconnect "after" the phase converter with fuses sized as close to actual running load as possible.
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