In alt.engineering.electrical Daniel Who Wants to Know wrote:
| wrote in message
| ...
| In alt.engineering.electrical Daniel Who Wants to Know
| wrote:
|
| | Yes like my Amana commercial RadarRange which is 4KW in 2.2KW out and
| has 3
| | HV magnetrons along with 3 each of the other necessary items (cap,
| diode,
| | etc.). It even has a current transformer that tells the control board
| via
| | current draw when the magnetrons are warmed up so that the timer doesn't
| | start counting down until it is actually cooking. It has a standard
| NEMA
| | 6-20 plug on it now and will pop a bag of popcorn in roughly 75 seconds
| | without scorching it. I can tell you it sure beats the hell out of
| regular
| | microwave ovens for most things. The only thing I still use the regular
| one
| | for are items that involve liquids as the Amana tends to make them
| either
| | boil over or boils out all of the water before the food is cooked.
|
| Will it operate on single phase power, like I have in my home?
|
|
| Considering a NEMA 6-20 plug only has the 2 hot prongs plus ground and the
| cord is a 14-3 AWG with one conductor being ground, yes it is single phase.

Don't be so quick to jump to conclusions. The NEMA 6-XX series gets used for
both the 208 volt 120 degree and the 240 volt 180 degree 2-wire connections.
Some devices work on one and not the other. You CAN derive three phase from
one and not the other. A motor could be wired to use that angular difference
(with the neutral) to achieve a motor starting direction instead of having a
capacitor to change the angle on a shaded pole.

Also, if the supply is 208 volts then the maximum power available is 4157 watts
(3326 under the 80% rule), whereas with 240 volts it is 4800 (3840 under 80%).

240 volts is a 15.47% increase over 208 volts. 277 volts is a 15.47% increase
over 240 volts. Can either of those be substituted for 240 volts easily?

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