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.
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
