Sample interview questions: How do you ensure proper grounding and bonding in commercial electrical systems?
Sample answer:
Ensure Proper Grounding and Bonding in Commercial Electrical Systems
1. Establish a Grounding Electrode System (GES)
* Install multiple grounding electrodes (e.g., ground rods, plates, etc.)
* Maintain a minimum distance between electrodes
* Connect electrodes using a grounding electrode conductor (GEC) to the main electrical panel
2. Bond Electrical Systems and Equipment
* Install a bonding jumper between the GES and the neutral bus in the main panel
* Use grounding conductors to connect all exposed conductive surfaces to the GES (e.g., metal conduit, equipment frames, etc.)
3. Install Ground Fault Circuit Interrupters (GFCIs)
* Place GFCIs in areas with moisture (e.g., bathrooms, kitchens)
* GFCIs quickly detect ground faults and trip the circuit
4. Inspect and Maintain Regularly
* Visually inspect grounding and bonding components periodically
* Test ground resistance using a ground resistance tester
* Check cable continuity and connections for integrity
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