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-   -   240v subpanel to double the 120v circuits (https://www.askmehelpdesk.com/showthread.php?t=333704)

  • Mar 25, 2009, 09:57 AM
    newanimal7
    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!
  • Mar 25, 2009, 02:22 PM
    stanfortyman
    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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