Electric Heater

Discussion in 'General Electronics Chat' started by racm60, Dec 23, 2008.

  1. racm60

    Thread Starter New Member

    Dec 23, 2008
    I install a electric heater in my garage the heater is 240 volts KW 10 phase 1
    Motor V240
    Freg 60 FLC amp .55 HP 1/30 phase 1
    My question is can I ran from the heater a #6 wire to the sub panel only with red and black wire and a ground.
    What will be the circuit breaker size.
    P.S from the main panel I ran a #6 wire red, black, white and ground to the sub panel.
  2. leftyretro

    Active Member

    Nov 25, 2008
    10KW at 240vac is around 42 amps

    I think #6 is too small, #5 would be marginal and #4 would be the best choice. But check the chart yourself:


    This kind of installation should really be done by a qualified electrician that is also familure with the building code requirements for your area.

  3. thingmaker3

    Retired Moderator

    May 16, 2005
    I don't know where this "700 circular mils per Amp" rule came from.

    According to the NEC, #6 conductors are indeed adequate for this application. A neutral is not needed unless the heater is a four-wire heater. (The neutral in a 4-wire single-phase 240V system allows some components to use 120V if needed.)

    I would use a fifty Amp breaker.