ICC Residential Electrical Inspectors Practice Exam

A metal well casing shall be connected to the pump circuit _____________ conductor where a submersible pump is used in the casing.

1. equipment grounding

2. neutral

3. power

4. phase

The correct answer is: equipment grounding

The connection of a metal well casing to the pump circuit's equipment grounding conductor is essential for ensuring safety and compliance with electrical codes. When a submersible pump is used, the metal casing can potentially become energized due to faults or electrical issues. Connecting the casing to the equipment grounding conductor creates a low-resistance path for fault current, helping to clear any faults quickly, which in turn helps to prevent electric shock hazards and possible fire risks. An equipment ground provides a safety mechanism that ensures any stray voltage is safely diverted to the ground, reducing the risk of injury or damage. This practice is in line with electrical safety standards that aim to enhance protection for both the equipment and individuals working near or with the electrical installations. In contrast, connecting the well casing to the neutral conductor could introduce potential hazards, as the neutral is intended to carry current under normal operation and could become energized under fault conditions. This connection would not provide the same level of safety that a grounding connection would offer.