The Importance of Isolating Neutral Wire in Electrical Subpanels

Why must the neutral wire be isolated from the ground wire in an electrical subpanel?

a) Bonded to the ground wire
b) Disconnected
c) Isolated from the ground wire
d) Fused with the ground wire

Answer:

In an electrical subpanel, the neutral wire must be isolated from the ground wire.

Explanation:

In an electrical subpanel, the neutral wire must be isolated from the ground wire. This is due to electrical safety reasons as well as efficient operation of the electrical system. Neutral and ground wires must serve different purposes in an electrical system, though both play crucial roles in safety.

The ground wire is used to offer a protective path for electrical energy to reduce the risk of electrical shock if a live wire comes into contact with a metal case on an appliance due to worn insulation. On the other hand, the neutral wire is part of the electrical circuit that carries current back to the service panel.

Connecting, or bonding, the neutral wire to the ground in a subpanel can lead to current flowing on both the neutral and ground wires simultaneously, which could cause electrical shock hazards. Therefore, in a subpanel, the neutral must remain isolated from the ground wire.

Electrical safety is paramount in any electrical system to prevent accidents and hazards. Proper wiring practices and following safety guidelines are crucial to ensure the safety of both individuals and the electrical system itself.