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    newanimal7's Avatar
    newanimal7 Posts: 4, Reputation: 1
    New Member
    		  
    #1

    Mar 25, 2009, 09:57 AM
    240v subpanel to double the 120v circuits
    I am planning to run feeder cable to a 240v subpanel for a future workshop about 90 ft from main. I may never need the 240 voltage but want to keep that base covered just in case. So, instead of a 120v 100 amp subpanel, I'll have a 240v subpanel with say... 60 amps each of the two 120v legs. Using red,blk,what #6 thhn w/#8 grnd from main to sub underground conduit. Is this correct? A shared neutral an issue? Voltage drop calculates at 2.1%. Thanks!
    stanfortyman's Avatar
    stanfortyman Posts: 5,598, Reputation: 279
    Electrical & Lighting Expert
    		  
    #2

    Mar 25, 2009, 02:22 PM
    Pretty much all sub-feeds are 120/240v. There is no reason at all to run a 120v only feeder. In fact it raises several problems not faced with a 120/240v feeder, such as you will NEVER find a single-pole 60-100A breaker.
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