Multi Branch Circuit Diagram. A multi wire branch circuit in a residential dwelling contains two 120v wires of different phases a and b phase and share one neutral wire as return current when a three wire nm cable is used for this type of circuit. The use of shared neutral circuits produces significant copper savings when two branch circuits are close to each other but far from the circuit breaker panel.
Multi Wire Branch Circuit Open Neutral Diagram 2 Circuit Neutral Electrical Panel from www.pinterest.com
The neutral wire from the circuit is shared by both sets. The red wire is usually the b phase 120v. If instead the electrician made a multi wire branch circuit pair by using positions 10b and 12a in our sketch or from positions 9 and 11 in the sketch using normal full width circuit breakers that would work correctly because the two circuits sharing a common neutral would have pulled power from two different panel bus bars.
Failure to properly terminate the ungrounded hot conductors.
2 0 multi wire branch circuits. Here 3 wire cable is run from a double pole circuit breaker providing an independent 120 volts to two sets of multiple outlets. Branch circuit 1 or between a breaker on phase b hot leg l2 black wire and neutral n white wire as shown for branch circuit 2 240 v branch circuit loads are connected between a breaker on phase a hot leg l1 red wire and phase b hot leg l2 black wire as shown for branch circuit 3. The red wire is usually the b phase 120v.
