User: joshgarcia, Location: Ware Shoals, South Carolina
Asked on: Monday, April 4, 2011 at 4:05 pm EDT
Answered on: Tuesday, May 14, 2024 at 3:45 am EDT
Question: Hello, I have the breaker open and racked out that feeds a 4160V motor 400 HP, my question is: for static build up reasons isnt the next step to ground the motor feeder conductors?Thanks,josh
Yes, the next step should typically be to ground the motor feeder conductors for static build-up reasons.
When a high-voltage circuit is isolated from ground, static charges can accumulate on the conductors. This can create a dangerous situation if the circuit is re-energized without grounding. The static charges can discharge through the motor, causing damage or creating a fire hazard.Grounding the motor feeder conductors helps to dissipate static charges. This can be done by connecting a grounding jumper between the conductors and a ground rod. The grounding jumper should be rated for the maximum voltage and current of the circuit.
Procedure to ground motor feeder
1. Rack out the motor breaker and open the disconnect.
2. Install a grounding jumper between the motor feeder conductors.3. Lock the grounding jumper in place using a padlock.
4. Close the disconnect and rack in the motor breaker.
Additional safety precautions: Wear proper personal protective equipment (PPE), including rubber gloves and boots. Use insulated tools. Be aware of the location of other energized circuits. Follow all applicable lockout/tagout procedures. Flag for review