Question

In buildings that contain systems of above one nominal voltage, a multi-wire branch circuit will have the underground wire identified by:

1. System
2. Voltage
3. Ampacity
4. Watts

Answer 1

1. System. In buildings with systems of multiple nominal voltages, the underground wire in a multi-wire branch circuit is identified by the system. This system helps prevent shocks and ensures electrical safety.

Step-by-step explanation:

In buildings with systems of multiple nominal voltages, the underground wire in a multi-wire branch circuit is identified by the system. The system is used to distinguish between different voltage levels and to ensure proper electrical distribution.

For example, in a three-wire system, the neutral wire is connected to the earth at the voltage source and user location, ensuring it is at zero volts and providing an alternative return path for the current through the earth. Additionally, the case of the appliance is grounded to zero volts. This system helps prevent shocks and ensures electrical safety.