Electric furnace circuit.

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ronball

Senior Member
Location
Champaign Il.
Occupation
Electric Contractor
Can I use 8/2 Romex for a electric furnace. Min. circuit 45.6 Max OCP. 50
120/ 208 volts Have about 39 of these to run. Thx
 
Negative. You need #6 NM cable or another wiring method.

Perhaps SE cable, even #6 aluminum, will save some money.
 
I missed the 208v myself. It's a good point, maybe. The unit may or may not be labeled differently for 208v.

OP: Is that the unit's 240v or 208v rating? Or is there only the single MCA?
 
LarryFine said:
I missed the 208v myself. It's a good point, maybe. The unit may or may not be labeled differently for 208v.

OP: Is that the unit's 240v or 208v rating? Or is there only the single MCA?
Click to expand...
Hoping the 120 was a typo.
ronball said:
Can I use 8/2 Romex for a electric furnace. Min. circuit 45.6 Max OCP. 50
120/ 208 volts Have about 39 of these to run. Thx
Click to expand...
May need four wire cable if unit needs 120/208. I doubt that though.

Or is the system voltage 120/208
With the unit being 208v
 
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