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Multi-wire Branch Circuit Wiring
F–6 976-0043-01-02
Figure F-5
Using a Step-down Autotransformer in Multi-wire Branch Circuit Wiring
Load Center
L1
L2
Neutral
Ground
120 Vac 120 Vac
15 A
Breaker
(Ganged)
Bare - Ground
Single White - Neutral
(Current Flow 0 A)
Black - Hot
(Current Flow 15 A)
Red - Hot
(Current Flow 15
A
White - Neutral Splice
(Current Flow 15 A)
15 A
Breaker
(Ganged)
T240
AutoTransformer
White - Neutral
HOT - L2
HOT - L1
HOT
NEUTRAL
The out-of-phase
current SUBTRACTS
at this point.
120 Vac
Inverter or Generator