The North America standard
for residential and light commercial applications. Two 120 V AC lines are
supplied to the premises which are out of phase by 180 degrees with each other,
along with a common neutral.
CHICAGO DIGITAL POWER offers products in the single phase to connect to one of the 120 VAC lines under the series 11 that include On-line, interactive UPS and AVR products from 250 watts to 3000 watts the max or 20 amp / NEMA 5-20.
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