Overcurrent protection for multi-wire branch circuits

Electrical · Lights, Outlets and Switches · printed page 105 (PDF page 106)

Book index entries

Electric Wiring – for Multi-Wire Branch Circuits Multi-Wire Branch Circuits – Electrical Wiring for Wiring – for Multi-wire Branch Circuits

Text in the illustration

distribution panel
from service box
STOVE
red wire
grounding terminal
ground wire
to split receptacle (properly wired)
to split receptacle (improperly wired)
black wire
red
neutral wire
neutral bus bar
note:
pairs of fuses are linked together in special fuse blocks intended for split receptacles and other multi-wire branch circuits (both fuses must be removed simultaneously)
in some areas, not all multi-wire branch circuits require special fuse blocks
red and black wires are fed from different bus bars
red and black wires are fed from same bus bar

Generated explanation

The illustration shows a fused distribution panel supplying multi-wire branch circuits to split receptacles, with red and black hot conductors, neutral conductors, and a grounding terminal identified. The properly wired circuit takes its red and black feeds from different bus bars, marked with a green check. The improperly wired circuit takes both feeds from the same bus bar, marked with a red cross. A neutral bus bar is shown at the bottom of the panel, and a stove fuse block appears above the branch-circuit fuses. An annotation explains that special linked fuse blocks allow both fuses of a multi-wire branch circuit to be removed simultaneously, while noting that requirements vary by area.

Related illustrations

0578

Overcurrent protection for multi-wire branch circuits

· p. 98

The illustration shows a fused electrical distribution panel with a stove fuse block, three paired branch-circuit fuse blocks, a grounding terminal, and a neutral bus bar. Red and black conductors supply two multi-wire b