Related illustrations

0538

Panel clearances

· p. 90

The illustration shows a wall-mounted electrical service panel with a main breaker, two columns of branch-circuit breakers, and wiring entering from both sides. Dashed lines outline the unobstructed working space in fron

0534

Panels

· p. 89

The illustration compares two residential electrical service and distribution arrangements. Arrangement A shows a newer combination panel with main circuit breakers above two columns of branch-circuit breakers, all in on

0542

Main breakers must be properly sized

· p. 91

The illustration shows an electrical service panel with its cover removed, exposing a main breaker, branch circuit breakers, bus bars, neutral bus bar, and grounding terminal. Service entrance wires enter at the upper ri

0531

Determining service size by the main disconnect

· p. 89

The illustration shows two ways to determine electrical service size by checking the amperage rating of the main disconnect. On the left, a combination panel contains a main breaker above two columns of branch-circuit br

0530

Determining service size by the service entrance wires

· p. 89

The illustration shows two locations for checking service entrance conductor size to help determine electrical service capacity: at the masthead and inside the service box. The exterior detail shows conductors emerging f

0536

Breaker and fuse type service boxes

· p. 90

The illustration compares three electrical service-box arrangements, identifying utility supply entries, grounding connections, and main disconnects. Arrangement A shows a main circuit breaker integrated into a panel wit

0546.5

Ground wires let breakers trip

· p. 91

The illustration shows an electrical service panel with a main breaker, branch-circuit breakers, bus bars, neutral bus bars, and grounding terminals. Incoming service conductors enter at the upper right, and a grounding

0583

Excess sheathing on panel wires

· p. 98

The illustration shows an open electrical distribution panel with a main breaker, branch-circuit breakers, bus bars, neutral bus bars, and a grounding terminal. Service conductors enter at the upper right, and cables lab