220.55 and 40A range circuit

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For anyone that's interested, I got the make and model on the 16KW range.
Frigidare 30" free-standing range
Model #FEFLMC55FCB
16.0KW @ 120/240V 60Hz.
12.0KW @ 120/208V 60 Hz.

steve
 
I appreciated this blog, I had a situation where the custermer wanted me to set up a connection for a new range and put in place where there was one. This one had a twist. The recepticle in place was configures for a dryer plug. The stove plug was a proper 3 flat blade type. When I looked at the name plate rating it stated 13.8kw, if you do the math 13800/240 = 57.5amp. The cable in place is #8CU, w/40a OCP. I felt we had a problem here, for sure. I decided to take a amp reading with each burner on high, then the stove. At max, it was pulling 56amps, but its cycling of the burners etc would have it jump from 36amp and back up, hold for a few seconds drop etc. I would have thought the name plate rating should be the sizing of the conductor and thus the breaker. I feel sure after studing (again) the code and reading each argument carfully that the calculation should be based on this: 14-12=2, 2x1000=2000, 5% per 1000w added to 8000w = 8kw x 1.1 = 8800w, 8800/240=37amp. So the circuit may be based on the minimum of 40amps.
If anyone would like to agree or disagree, please follow-up, thanks,Dave
 
suemarkp said:
Copper, but aluminum would be OK too as long as it isn't NM cable (every range receptacle I've seen of recent manufacture has a 75C stamp on it). Don't see aluminum used much here except for service drops and service laterals. But perhaps that has changed in the last few years with the absurd prices of copper.
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Glad I found this thread good disscussion.
I just got done evaluating a bunch of town homes built in 1976 all wired with AL 3 wire 8/2-WG SE cable rated at 75 Deg C (not visable so going with unmarked). This surprised me because it was on a 40A breaker feeding a 50A receptacle. A 12-14kw range of ranges in use.
338.10 (4)(a) specificly omit's 334.80 from applying.
And a thourough read of this thread confirms you can rate the circuit at 40 amps.
My initial reaction was that the installation did not meet code but it does as long as the old breaker is rated for 75 deg C and the terminations are de-ox'ed.

thanks all
 
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