Appliance wiring


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
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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.

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PV wrote:

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

Now you know plus thousands of others who read these posts. But thats what they are here for to live and learn. As the saying goes, Theres a reason for everything" Jack

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PV wrote:

Hi, Consider distance from breaker panel to dish washer for one.
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Most appliances are wired with 105 degree or higher wires plus they are not sealed in a cable. House wire is 90 degree, some is 60 degree.

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PV wrote:

The breaker is there to protect the house-wiring (and the house) in case of overload. Not the appliance.
J
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