How do you wire a transformer with the T3H code? Example EX75T3H.

Issue:
Wiring assistance is required for EE, EX, and older transformers with voltage code T3H

Product Line:
Low voltage transformers

Environment:
EE and EX transformers

Resolution:
Wiring is based on the transformer nameplate rating and is not for backfeeding:
1. Bring 480V  to taps H1, H2, and H3, or use the other taps to compensate for poor source voltages to maintain the 120/208V output.
2. Ground X0 per the NEC code, as that is the neutral.
3. Bring the wires from taps X1, X2,X3, and X0 to the load.
4. Do not take voltage readings from line to ground. Take voltage readings from line to line and or line to X0 the neutral. If you do not ground X0 you will have a floating neutral and that will provide odd and inconsistent voltage readings.

Released for:Schneider Electric USA