This is probably old hat for you guys, but one of my first forays into residential design.
10-story apartment building...I jumped right in.
I need to know the wattage of an electric range/oven for my load calcs.
The range has multiple separate elements, but ranges don't seem to be marketed on the total kW output.
The product literature gives the rating of each element, but they are very misleading, IMHO.
The G.E. booklet, for example, says you need a 50A cord and circuit for a 12-18kW range at 208V.
A 50A cord can only hold 10.4kW at 208V, and the 50A breaker feeding it will only hold 8.32kW continuously.
Obviously, there is some sort of thermostat-caused demand factor built into the range itself.
So which number am I supposed to be using for my NEC range demand factor calcs?
a) the sum of the elements
b) the max for the cord and breaker
c) the continuous rating of the breaker
I really like commercial construction. :lol:
Any education here would be greatly appreciated.
10-story apartment building...I jumped right in.
I need to know the wattage of an electric range/oven for my load calcs.
The range has multiple separate elements, but ranges don't seem to be marketed on the total kW output.
The product literature gives the rating of each element, but they are very misleading, IMHO.
The G.E. booklet, for example, says you need a 50A cord and circuit for a 12-18kW range at 208V.
A 50A cord can only hold 10.4kW at 208V, and the 50A breaker feeding it will only hold 8.32kW continuously.
Obviously, there is some sort of thermostat-caused demand factor built into the range itself.
So which number am I supposed to be using for my NEC range demand factor calcs?
a) the sum of the elements
b) the max for the cord and breaker
c) the continuous rating of the breaker
I really like commercial construction. :lol:
Any education here would be greatly appreciated.