"Stretch" wrote in message
oups.com...
22mw? Do you mean 22KW? Normally 10 KW requires 240 volts and a 60
amp breaker and #6 wire. Figure about 4.1 amps per KW at 240 volts.
An 11 KW heater would would work using the circuit provided. For 22 KW
you would need another 60 amp circuit. (2-x11 KW; 2x 60 amps @240
volts).

Note that 5KW would provide 17,065 BTUs/Hr. Therefore, your load
calculation must be wrong. A 5 KW heater should be enough to heat the
shop if your load was correct.

Note also that your heater elements should not glow. That indicates
low air flow. The heating coil in an electric furnace should have a
dull red glow or no glow at all if there is enough air flowing over the
heat coils. (The heat coils are also refered to as strip heat.)

Hope this helps

Stretch


AGree with all that and add this...

If you have a 25kW heater, its prob staged, meaning that the sequencers are
going to be delayed in bringing the strips online.

Your reading of 110V per side, really means nothing other than you have
110VAC to the strips, but they do require 220.
You should be reading 220VAC across them, assuming you have wired the
furnace correctly.