100 amp sub-panel install in garage

Discussion in 'The Garage' started by Megadeus, Feb 12, 2018.

  1. sparkingdogg

    sparkingdogg Prisoner In Disguise

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    I don't know how hot a chimney gets, but would be very hesitant to saddle one with EMT, NEC 310 contains ambient temperature derating factors. Just simply seems like a bad idea, wiring adjacent to a chimney.

    I personally would try and figure out an underground route, even if it meant saw cutting a strip of concrete, or tunneling under a sidewalk. Run 1.5" PVC the whole way, maybe even 2" to make the wire pull easier.

    I have a 100A 220V sub panel in my garage and it's sure been nice, mine was easy, my main panel is 3' away on the other side of a block wall. It's really nice to have 220 when you want. I put in a 4.5 kW 220V unit heater I got free... plus I got the sub panel free too. Spent many years in the trade, mostly as a foreman (first dibs on demo haha). When I moved in here, I had the standard 15A single duplex outlet, fed from the master bathroom. Trip the GFCI, had to go upstairs to reset it. Much nicer now. I must have 6 or 8 dedicated 20A circuits, I have never once tripped a breaker or GFCI out in the shop. When I installed 2 new air conditioners, it was super easy to feed them from the sub panel, too. Invaluable.
    #21
  2. OdyBandit

    OdyBandit Been here awhile

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    A friend of mine is an electrical contractor and he would have no problem with that. Just make sure to size your wire correctly, ground the sub box and all in conduit. Also sounds like it may be a shorter run.
    #22
  3. the_gr8t_waldo

    the_gr8t_waldo Long timer

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    one that jumps out at me is the installed recpt. is not at lest 48inches above a garage floor
    #23
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  4. ydarg

    ydarg Miscreant

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    The unprotected feeder and hard wired whip to the mill would be another. 300.4

    Can't tell if it has more than six ocpd to be exempt from main breaker requirement.
    #24
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  5. the_gr8t_waldo

    the_gr8t_waldo Long timer

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    maybe not totally crazy but why run around the house with conduit? it looks like crap! no matter how much effort you put into making it look like something. digging is alot of work too. and if you exceed a total of 360 degrees of bends you'll need a underground pull box ( try pricing one of these and any sane person would drop the project) ........why not just drop out of the panel and LB (elbow) into the crawlspace. run almost straight to a convenient exit spot? if then you have to run a few feet , on the outside of the exterior wall to get to the desired location it won't look remotely as bad and you'll save on material costs to boot. pulling in wire will be much easier too.
    #25