In a 3 phase system it is legal in some jurisdictions to share a single neutral wire between all three 3 phases. A shared neutral is a connection in which a plurality of circuits use the same neutral connection.
Knob Amp Tube Switches Shared Neutral Doityourself Com
Shared neutral wiring diagram. David berquist 688 views. This photo is an example of a multiwire branch circuit preferred wiring diagram. The neutral points in both alternator and the load are joined together. This photo is an example of a multiwire branch circuit incorrect wiring diagram. These can often be found in older properties where the stairway light is connected to line from the. Shared or borrowed neutrals which are unwanted interconnections between two circuits.
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. I show and explain a shared neutral 2 separate circuits wiring a outlet 2 circuits in 1 outlet duration. The neutral wire serves as common return to all the three phases acting outward from n 1. 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. In the above diagram the alternator is connected to the load by three phase four wire system.
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. Why are multiwire branch circuits used.
Gallery of Shared Neutral Wiring Diagram
