Thereof, what is a multiwire circuit?
A Multiwire Branch Circuit (in the electrical code) is defined as a branch circuit that consists of two or more ungrounded conductors (two or more “hot” wires) that have a voltage between them (they are not on the same electrical phase and so are connected to different buses in the electrical panel), and a grounded
Beside above, what is the difference between 12 2 and 12 3 wire? Bottom line is that you use 12/2 when you need two conductors plus ground, and 12/3 when you need three conductors plus ground.
Beside above, what is a 3 wire circuit?
A typical 3–wire circuit is actually two separate parallel circuits with a common conductor. If the grounded (neutral) conductor is opened, the circuit changes from two 120V parallel circuits to one 240V series circuit. Consider the following example.
When can two circuits share a neutral?
This is also known as a common neutral, and the circuits and neutral together are sometimes referred to as an Edison circuit. In a 3-phase system it is legal in some jurisdictions to share a single neutral wire between all three (3) phases. One neutral may not have two “hot” wires from the same phase.