Dishwasher/disposal wiring

Discussion in 'Electrical Forum discussion & Blog' started by JMingrone, Nov 26, 2012.

  1. JMingrone

    JMingrone New Member

    Messages:
    49
    Location:
    Connecticut
    Do a disposal and DW HAVE to be on separate circuits? I have 2 circuits allocated for them, but one has plenty of capacity to run both. Can I simplify and run both off the one?

    Also, Can the NM cable just come thru a hole in the sheetrock into the area where the sinkbase will be and after the sinkbase is installed, put a JB inside?

    Thanks

    -Jay
  2. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Messages:
    21,804
    Location:
    New England
    Depends...if the installation instructions call for separate circuits, you should use separate circuits. Disposers are available in at least up to 1Hp versions, which along with a DW that was heating the water, might overload the circuit. So, to preserve long-term potential changes and options, an extra circuit won't hurt.
  3. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    26,251
    Location:
    Cave Creek, Arizona
    In some cases, if not MANY, since the disposer, (NOT "Disposal"), switch is combined with other switchs or outlets above the countertop level, it is wired into that circuit and the dishwasher is separate, even though the disposer and dishwasher share the same duplex outlet.
  4. JMingrone

    JMingrone New Member

    Messages:
    49
    Location:
    Connecticut
    Went ahead and ran both wires. Easy enough to do.

    Thanks guys,

    Jay
  5. big2bird

    big2bird IBEW Electrician

    Messages:
    141
    Location:
    Anaheim, Ca.
    I would run a 14/3 cable, feed it from a 2 pole 15 ampere breaker, and cut the tab between the upper/lower receptacle on the hot side.
Similar Threads: Dishwasher/disposal wiring
Forum Title Date
Electrical Forum discussion & Blog GFCI wiring Jun 2, 2014
Electrical Forum discussion & Blog Hot Tub Wiring May 28, 2014
Electrical Forum discussion & Blog Questions on old wiring stapled to bottom of joists Apr 16, 2014
Electrical Forum discussion & Blog Wiring and layout for barn Mar 5, 2014
Electrical Forum discussion & Blog Wiring in a 220 circuit for Tankless water heater - Cunduit from behind the wall? Nov 21, 2013

Share This Page