Power supply for LiftMaster SL 1000
The unit requires 120 VAC 20 AMP
Standard electrical formula is volts x amps = watts
120 x 20 = 2400 Watts
It is pretty much a given in the U.S. that your standard voltage at a private home is going to be between 108 and 117 volts. Depending on many factors (distance from substation, number of homes serviced by one transformer etc).
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