1. A multiwire branch circuit has both energized wires of a 120-240V split phase service. 2. The rotor's three phases are connected to six branch circuits . 3. The smallest branch circuit rating is 15 amperes, used for general purpose receptacles and lighting. 4. They also provide parallel arc protection for the branch circuit starting at the AFCI receptacle. 5. Existing homes with this older aluminum wiring used in branch circuits present a potential fire hazard. 6. An AFCI does not detect high line voltage due to an open neutral in a multiwire branch circuit . 7. However, most existing residential knob-and-tube installations, dating to before 1940, have fewer branch circuits than is desired today. 8. Feeder and branch circuit wiring systems are designed primarily for copper wire is used almost exclusively in branch circuitry. 9. The reported hazards are associated with older solid aluminum branch circuit wiring ( smaller than No . 8 AWG) 10. Each of the six branch circuits make their way three times progressively around the rotor in right hand flattened spirals.
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