Threewire

Threewire is a term commonly used in electrical wiring to describe a system that utilizes three conductors to carry electrical power. These conductors typically include a hot wire, a neutral wire, and a ground wire. The hot wire carries the electrical current from the power source, while the neutral wire provides a return path for the current. The ground wire is a safety feature that provides a path for fault current to flow to the earth in the event of a short circuit or ground fault, preventing electrical shock.

Three-wire systems are standard in most residential and commercial buildings for single-phase power distribution. The voltage between the hot and neutral wires is typically 120 volts, while the voltage between the hot and ground wires is also 120 volts. The neutral and ground wires are usually bonded together at the main electrical panel to ensure a common reference point. This configuration allows for the operation of standard appliances and devices that require 120-volt power.

In some applications, a three-wire system may also refer to a configuration for three-phase power, which involves three hot wires and sometimes a neutral and/or ground. However, the most common understanding of "threewire" refers to the single-phase residential and commercial wiring setup. Proper installation and adherence to electrical codes are crucial for the safe and effective operation of any three-wire electrical system.