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Appliance wiring PV 10-23-2006
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Posted by PV on October 23, 2006, 9:42 pm


Just a question out of pure curiosity.

New dishwasher installation, manual calls for a 20 amp breaker. No problem,
run 12Ga/2 (with ground ) Romex from breaker to J-Box, Run 12Ga/2 (with
ground ) BMX up to dishwasher. Open dishwasher electrical cover and it has
16Ga wire?????

So if code requires 12Ga for a 20 amp circuit how can the UL/CSA labeled
Kenmore dishwasher have 16GA wire for the final connection. Same thing with
the garbage disposal system.

Any thoughts on this one?

PV



Posted by J.A. Michel on October 23, 2006, 10:06 pm


Appliance manufacturers don't bother with things like NEC requirements for
ampicity. Look inside your electric water heater, same thing. You're
suppose to run #10 wire on a 30 amp breaker to it, just to find that your
tying on to 12 or 14 gage wires inside. It's UL listed that way, so it's OK
to use it.



> Just a question out of pure curiosity.
>
> New dishwasher installation, manual calls for a 20 amp breaker. No
> problem, run 12Ga/2 (with ground ) Romex from breaker to J-Box, Run 12Ga/2
> (with ground ) BMX up to dishwasher. Open dishwasher electrical cover and
> it has 16Ga wire?????
>
> So if code requires 12Ga for a 20 amp circuit how can the UL/CSA labeled
> Kenmore dishwasher have 16GA wire for the final connection. Same thing
> with the garbage disposal system.
>
> Any thoughts on this one?
>
> PV
>



Posted by indago on October 23, 2006, 10:42 pm


PV wrote:
>
> Just a question out of pure curiosity.
>
> New dishwasher installation, manual calls for a 20 amp breaker. No problem,
> run 12Ga/2 (with ground ) Romex from breaker to J-Box, Run 12Ga/2 (with
> ground ) BMX up to dishwasher. Open dishwasher electrical cover and it has
> 16Ga wire?????
>
> So if code requires 12Ga for a 20 amp circuit how can the UL/CSA labeled
> Kenmore dishwasher have 16GA wire for the final connection. Same thing with
> the garbage disposal system.
>
> Any thoughts on this one?
>
> PV

The appliance circuit from you panel to the appliance is usually a longer
distance than the smaller
wires within the appliance. And besides, the smaller wire probably has a
greater heat resistant insulation.

Posted by Don Young on October 23, 2006, 10:45 pm



> Just a question out of pure curiosity.
>
> New dishwasher installation, manual calls for a 20 amp breaker. No
> problem, run 12Ga/2 (with ground ) Romex from breaker to J-Box, Run 12Ga/2
> (with ground ) BMX up to dishwasher. Open dishwasher electrical cover and
> it has 16Ga wire?????
>
> So if code requires 12Ga for a 20 amp circuit how can the UL/CSA labeled
> Kenmore dishwasher have 16GA wire for the final connection. Same thing
> with the garbage disposal system.
>
> Any thoughts on this one?
>
> PV
>
Perfectly normal and safe. It is a totally different enviornment from the
feed cable. Appliance wire is usually totally contained in the metal
appliance shell and usually has an insulation which will stand higher
temperatures.

Don Young



Posted by PV on October 24, 2006, 12:09 am



>
>> Just a question out of pure curiosity.
>>
>> New dishwasher installation, manual calls for a 20 amp breaker. No
>> problem, run 12Ga/2 (with ground ) Romex from breaker to J-Box, Run
>> 12Ga/2 (with ground ) BMX up to dishwasher. Open dishwasher electrical
>> cover and it has 16Ga wire?????
>>
>> So if code requires 12Ga for a 20 amp circuit how can the UL/CSA labeled
>> Kenmore dishwasher have 16GA wire for the final connection. Same thing
>> with the garbage disposal system.
>>
>> Any thoughts on this one?
>>
>> PV
>>
> Perfectly normal and safe. It is a totally different enviornment from the
> feed cable. Appliance wire is usually totally contained in the metal
> appliance shell and usually has an insulation which will stand higher
> temperatures.
>
> Don Young

Wasn't really concerned, just one of those things that make me go hmmmmmmmm,

PV



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