For a 12.6 kW electric range, using the demand factor in table 220.55, you get 8.4 kW. At 208 volts, this works out to 40.38 amps. I vaguely recall Ryan Jackson discussing that you could drop the fractional requirement for load calculations but not for branch circuits. Are you still putting a 40 amp breaker and 40 amp wire in this instance?
Electric range question
- Thread starter cppoly
- Start date
Strathead
Senior Member
- Location
- Ocala, Florida, USA
- Occupation
- Electrician/Estimator/Project Manager/Superintendent
I wouldn't. I would put a 50A receptacle, wire and breaker for a range, period. Covers upgrades.
- Location
- New Jersey
- Occupation
- Journeyman Electrician (retired)
Is this range rated at 12.6 KW at 208 volts.
The spec says 240 volts but I believe someone had confirmed it would work on 208 volts. Something doesn't seem right based upon the spec.
30" Electric Range Stainless Steel-FCFE3083AS | Frigidaire https://share.google/SU5fkmVVt0GBs9wGx
NJTommy
Member
- Location
- New Jersey, USA
- Occupation
- Journeyman
I would contact the manufacture and get it in writing that it can work on 208v. Its better to be safe then sorry.
- Location
- New Jersey
- Occupation
- Journeyman Electrician (retired)
If operated at 208 volts the current will be much lower than that of a 240 volt oven with the listing of 12.6 KW.
Strathead
Senior Member
- Location
- Ocala, Florida, USA
- Occupation
- Electrician/Estimator/Project Manager/Superintendent
See post #6 the burners wont get nearly as hot and the oven will take longer to heat up
Birken Vogt
Senior Member
- Location
- Grass Valley, Ca
Almost 100% of the time, the range rating in kw at 208 volts will be 75% of its rating on 240 volts. There will be no concern whether it will work, it is a resistive heater, it will work fine just lower power.
winnie
Senior Member
- Location
- Springfield, MA, USA
- Occupation
- Electric motor research
I found the spec via a different approach, and I agree that something doesn't seem right.
According to the spec it only uses 13A at 240V and requires a 40A circuit.
The 40A circuit I believe; it is only a 30" range. But things seem fishy.
- Location
- Tennessee NEC:2017
- Occupation
- Semi-Retired Electrician
All range receptacles are 50A. You won't find a 40A receptacle.
- Location
- New Jersey
- Occupation
- Journeyman Electrician (retired)
If this is dual rated 240/208 volts then it should have two different KW ratings. Since you're using a 208 volt supply you can use the lower KW rating in calculating the size of the branch circuit.
curt swartz
Senior Member
- Location
- San Jose, CA
- Occupation
- Electrical Contractor
I have never seen a 208v only residential range or dryer. Only 240/208. I think that is a good thing. The average user or property manager has no understanding about voltages of range/dryer receptacles. Connecting a 208V appliance to a 240V circuit could be a fire hazard.
- Location
- New Jersey
- Occupation
- Journeyman Electrician (retired)
It would certainly draw more current and have a much higher output so it could be a hazard. FWIW I ran a 208 volt 7.5v kw garage heater on 240 volts for a decade.
