Firing > Firing / Kilns

Low voltage during the summer


Thanks for this info Arnold....Interesting that just a small drop in voltage can affect the firing time so greatly.  I'll pass this info along to a person I know that has been dealing with some strange firing issues....sometimes it fires fast, sometimes slow?  Maybe they are dealing with some voltage issues?

Arnold Howard:
Every summer, people report that their kilns fire slowly.

 Even a small drop in voltage can slow your kiln down. Here is an example from my own test firings:     I test-fired a kiln that took 5 hours and 3 minutes to reach 2331 degrees F (1277 C). In an earlier firing on a different circuit, the same test kiln took only 2 hours and 30 minutes to reach 2350 degrees F (1287 C).   
 The difference in voltage between the two 120-volt circuits? Only seven volts. If your kiln is slowing down, do not assume that it is due to worn elements. The voltage to your building may be low due to summer time demand. If so, try firing your kiln when electrical demand is lower and consequently the voltage is higher. Fire at night or early morning.


Arnold Howard
Paragon Industries, L.P., Mesquite, Texas USA /


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