DON’T use an extension cord, ever.
There’s a reason that power cords on kilns are short, and that’s because they use large amounts of energy, usually 13-14 amps at a minimum.
Adding an extension cord adds two additional sets of contacts, not to mention the possibility of a smaller wire diameter.
One well-known kiln retailer (who happens to live and work in Canada) even states
You can run house wiring 100 ft from the service panel so there’s no reason you can’t use a 100 ft extension cord. Continue reading