This is also known as a common neutral and the circuits and neutral together are sometimes referred to as an edison circuit. A shared neutral circuit uses 3 conductor nm b wire to join two adjacent circuit breakers in the panel to a junction box near the branch circuit loadsoutlets see figure 2.
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Shared neutral wiring diagram. The neutral points in both alternator and the load are joined together. A shared neutral is a connection in which a plurality of circuits use the same neutral connection. These can often be found in older properties where the stairway light is connected to line from the. Why are multiwire branch circuits used. I show and explain a shared neutral 2 separate circuits wiring a outlet 2 circuits in 1 outlet duration. Multiwire branch circuits can offer fewer conductors reduce the raceway size and reduce voltage drop.
Therefore the total neutral current is the vector sum of the three line currents. In the above diagram the alternator is connected to the load by three phase four wire system. Shared or borrowed neutrals which are unwanted interconnections between two circuits. David berquist 688 views. This photo is an example of a multiwire branch circuit preferred wiring diagram. 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.
The neutral wire serves as common return to all the three phases acting outward from n 1. In a 3 phase system it is legal in some jurisdictions to share a single neutral wire between all three 3 phases. This photo is an example of a multiwire branch circuit incorrect wiring diagram.
Gallery of Shared Neutral Wiring Diagram
