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.

 

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.

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:

http://www.powerstream.com/Wire_Size.htm

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


Lefty

 

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.