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Overglaze 2
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Microwave Kilns 10
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Bronze Clay 2
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General 17
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Kiln Installation 37
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Kiln Operation 60
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Digital Controllers 24
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Buying a Kiln 1
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Enameling 6
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Loading the Kiln 13
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Ceramics & Pottery 40
Can you fire an older A-series Paragon kiln on a 3-wire circuit?
The 4-wire system is required in the earlier Paragon A-series kilns because they use 4-way rotary switches. Around 1987, we converted to infinite control switches. That typically requires a 3-wire system.
There are two elements wired to each 4-way rotary switch used on the A-series kilns. On LOW, both elements fire on 120 volts. On MEDIUM, only 1 element fires on 120 volts. On HIGH, both elements fire on 240 volts.
Since the kiln is actually 120/240 volt, it requires a neutral current-carrying wire. The 4th grounding wire is for safety.
Technically, our 4-wire kiln will operate on 3 wires, but it's not considered safe. Our UL Listing requires a 4-wire circuit.
Electric kilns that use infinite switches need only 2 current-carrying wires. The third is a grounding wire.
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