Multi Branch Circuit Diagram. 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. By requiring each multi wire branch circuit to be provided with a means to simultaneously disconnect all ungrounded conductors at the point where the branch circuit originates such as at the panelboard or load center a change to 210 4 b in the 2008 nec prompted the industry to move away from multiwire branch circuits.
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. There is nothing wrong with using multi branch but if you do decide that it is the best option then make sure you take proper precautions as per code nec 2014. Here 3 wire cable is run from a double pole circuit breaker providing an independent 120 volts to two sets of multiple outlets.
There is nothing wrong with using multi branch but if you do decide that it is the best option then make sure you take proper precautions as per code nec 2014.
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. 2 0 multi wire branch circuits. By requiring each multi wire branch circuit to be provided with a means to simultaneously disconnect all ungrounded conductors at the point where the branch circuit originates such as at the panelboard or load center a change to 210 4 b in the 2008 nec prompted the industry to move away from multiwire 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.
