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kiln connection

updated fri 2 may 03


Tom Buck on thu 1 may 03

If your electric kiln needs 12 kilowatts (kW) or more of power (ie, load,
see nameplate), then typically the amperage at 240 volts would be
12,000/240 or 50 amps. Hence, element wires/coils are made to handle 48+
amps overall. the actual resistance (ohms) of the element wires, which is
essentially fixed (almost), will determine what the amps will be at a
given voltage.
A kitchen range, if fully on, will require 7+ kilowatts of power
(240 v, 32 amps or more). the connecting plug and convenience outlet are
therefore designed for this service. and asking the plug prongs to handle
50% more amperage when you connect a 48-amp kiln to this outlet is a bit
on the dicey side.
Hard-wiring, or connecting the power leads to the kiln leads via
a very positive (ie, large) area of connection, is the proper way to
avoid a possible fire due to arcing of the prongs at high amps.
and to complete the hard-wiring, one should install near to the
kiln a suitable single-throw handled switchbox with proper fuses (or
til later. peace. Tom B.

Tom Buck ) -- primary address.
"alias" or secondary address.
tel: 905-389-2339 (westend Lake Ontario, province of Ontario, Canada).
mailing address: 373 East 43rd Street, Hamilton ON L8T 3E1 Canada