CSP1 Lesson 8

A unit of an electrical system, other than a conductor, that carries or controls electrical energy as its principal function is best defined as   ?  .

• a device

• electrical equipment

• a sign

• energized

Which of the following best defines the circuit conductors between the final overcurrent protective device and the outlet(s)?

• branch circuit

• electrical wiring

• feeder

• supplemental branch circuit

A _____ is generally not considered an outlet by the NEC.

• device box with a 3-way switch

• box with a surge-protective device (SPD) receptacle

• device box with a duplex receptacle

• device box with a GFCI receptacle

Where a device box is installed in a wall or ceiling that has a finish surface made of gypsum wallboard, what is the maximum distance that the face of the box or plaster ring is permitted to be set back from the finish?

• 1/4"

• 1/2"

• 3/8"

• no set back permitted

Answer explanation

314.20

The maximum gap permitted between drywall and the edge of a device box or plaster ring shall not be greater than _____.

• 1/8"

• 1/4"

• 2"

• 3/8"

Answer explanation

314.21

Where the branch circuit wiring is installed (fished) in existing hollow spaces of walls or ceilings, the device boxes are required to be secured to the _____.

• finished surface

• metal framing member of the wall or ceiling

• wood framing member of the wall or ceiling

• internal framing supports

Answer explanation

314.23(C)

When determining conductor fill (volume allowances) at device boxes, branch circuit conductors that pass through a device box without a splice or termination are required to be counted in accordance with which of the following volume allowances?

• each conductor must be counted once

• all must be counted as one conductor

• they are not required to be counted

Answer explanation

314.16(B)(1)

When a receptacle device is installed on a 20 A branch circuit (#12 AWG conductors), what is the minimum volume allowance required for conductor fill for each conductor in the outlet box?

• 2.25 in³

• 4.00 in³

• 4.50 in³

• 2.50 in³

Answer explanation

314.16(B)(1), T.314.16(B)

What is the maximum overcurrent protection rating for a circuit of 12 AWG THWN conductors that originate from a circuit breaker in a panelboard and terminate directly on a 20-ampere receptacle?

• 15 A

• 20 A

• 25 A

• 30 A

Answer explanation

T.310.16, 210.21(B)(1)

What is the minimum size equipment grounding conductor required for a branch circuit protected by an overcurrent device rated at 40 amperes supplying a range receptacle rated at 50 amperes?

• 12 AWG copper

• 10 AWG aluminum

• 10 AWG copper

• 8 AWG copper

Answer explanation

T.250.122