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Old 01-10-2010, 11:08 AM  
tiorunder
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Default More wiring questions !

The length of wire needed to wire my cooktop is approx. 20 feet. I have 2 questions:

1.) What size wire should I use ?
2.) What size (amps) circuit breaker should I use ?

Thanks again.

John from NC


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Old 01-10-2010, 11:13 AM  
Blue Jay
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Need to know how many amps the cook top requires. Would be stated on an information plate on the cook top.


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Old 01-10-2010, 11:23 AM  
tiorunder
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It is a new Frigidaire unit and the only specs I found on it were as follows: "All electric cooktops run off a single phase, 3-wire or 4-wire cable, 240/208volt, 60 hertz, AC only electrical supply with ground."
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Old 01-10-2010, 02:21 PM  
speedy petey
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There will be a wattage or kW rating somewhere. Typically there is a sticker or plate right on the unit.

Without that we cannot give an answer.
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Old 01-10-2010, 02:55 PM  
tiorunder
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208 - 5.0 kW
240 - 6.7 kW

Hope this helps. Thanks again.
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Old 01-10-2010, 04:36 PM  
speedy petey
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A 30A circuit would be legal, but a 40A circuit would afford some cushion and allow for a larger unit to be installed in the future.

A 30A circuit would require #10cu or #8al
A 40A circuit would require #8cu or #6al (possibly #8al depending on installation/application and code cycle followed).

Do the instructions mention a "4-wire" feed, or anything about requiring a neutral?
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Old 01-10-2010, 08:31 PM  
tiorunder
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The instructions include wiring illustrations for both 3-wire and 4-wire installation.
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Old 01-10-2010, 08:32 PM  
tiorunder
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In the 4-wire illustration, the white feed wire is capped.
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Old 01-11-2010, 05:08 AM  
speedy petey
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OK, so this is a straight 240v appliance. The 4-wire illustration is only there for installations where this unit is replacing a unit with a 4-wire feed.

For your new circuit you would use 10/2 or 8/2 cable. IMO for what you are installing 10/2 is fine. Especially considering the short distance and that this is brand new unit. Any future upgrade, while unlikely any time soon, will not be very hard.
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Old 01-11-2010, 05:50 AM  
tiorunder
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Thank you Speedy Petey !


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