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Old 2017-03-01, 3:23pm
Alaska Alaska is offline
Alaska Boro
 
Join Date: Dec 10, 2009
Location: Anchorage, Alaska
Posts: 1,065
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Most home 110 volt AC circuits are rated at 20 amps. Some at 15 amps. Check the circuit breaker for the correct ratings. For a 20 amp circuit the wire size is #12 copper.

Would suggest for extension cord use, that the cord should consist of #12 wire. For a 13 amp load one could use a cord that does not exceed 50 feet if made of #12 copper wire. Shorter would be better.

If the extension cord is getting hot when the kiln is in use, then its wire size is too small for safe use. Stop using, and use a cord with a larger wire size.
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