Use Copper Wire for Hook Up

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All Cautions

POST FIRING CAUTIONS

  1. Do not use aluminum wire on the final connection to the kiln.
  2. The specific reason particular to kilns is that the wire tends to get hotter near the kiln than it might going into some other types of appliance.
  3. Being a resistive load, there is constant heat being generated by the conductors for quite a few hours. When aluminum wire gets hot it accelerates oxidation. Aluminum oxide is a resistor; copper oxide is not as much. If the connection at the terminal board gets oxidized it will really heat up - to the point where it could cause a fire.
  4. Note: Depending on local codes it may be OK to use aluminum wire to your sub-panel - as long as that wire is not exceeding its temperature rating while kiln is firing on full power for an extended period of time.