422.1 Worksheet

In a dwelling, a living room branch circuit with a 20-ampere rating can be loaded to a maximum of ___ amperes.

20

Which of the following is not a standard rating for a branch circuit supplying several loads?

25 amperes

A 50-ampere rated single receptacle may be installed on a ___-ampere individual branch circuit.

50

One single receptacle with a 20-ampere rating may be installed on a ___-ampere individual branch circuit. I. 15 II. 20

II only

A duplex receptacle with two circuits on the same yoke is permitted to have ___ as a means of disconnect. I. two single-pole circuit breakers without tie handles II. one double-pole circuit breaker III. two single-pole circuit breakers with tie handles

II or III only

All branch circuits that supply 125-volt, 15- and 20-ampere outlets installed in dwelling unit ___ shall be protected by an arc-fault circuit interrupter listed to provide protection of the entire branch circuit.

bedrooms

Two 20-ampere small appliance circuits ___ supply more than one kitchen of a dwelling.

cannot

Improper wiring or mishandling of multiwire branch circuits can cause ___. I. overloaded grounded conductors II. overvoltage of loads connected to the circuit

either I or II

Receptacles connected to a 20-amp residential branch circuit are to be rated ___. I. 15 amperes II. 20 amperes

either I or II

A branch circuit that supplies only one utilization equipment is a(n) ___ branch circuit.

individual

In nonmetallic sheathed cable, the equipment grounding conductor for 15-, 20-, and 30-ampere branch-circuits ___.

must be the same size as the insulated circuit conductors