121 Reading Worksheet

A GFCI receptacle ___ permitted to be located directly behind a freezer in a residential garage.

• is

• is not

When measuring the depth of a buried raceway, you must measure from the top of finish grade to the ___ of the buried raceway.

• end

• top

• middle

• bottom

Type UF cable installed under a parking lot must be buried at least ___ inches deep.

• 24

• 18

• 6

• 0

When an outdoor receptacle is used for the permanent connection of a cord from a 12‑volt, low‑voltage lighting transformer, a cover that maintains the weatherproof integrity of the receptacle must be provided.

• True

• False

Refer to Figure 121.218. The raceway is Schedule 40 PVC and contains a 120-volt, 20-amp GFCI-protected circuit. The conduit is buried beneath the driveway for a house. The driveway is 6 inches thick. The minimum distance for “Y” is ___ inches.

• 18

• 12

• 4

• 24

• 6

A post light is located in the front yard of a house as shown in Figure 121.212. Schedule 40 PVC will be installed under the yard to get power to the 120-volt light. In inches, what is the minimum depth from the top of the conduit to the top of the dirt in the yard?

• 4

• 6

• 24

• 12

• 18

Table 300.5 in the NEC permits a 120-volt, 15-amp, residential, underground circuit to be buried as shallow as 13 inches below grade, when the wiring method is ___ and the circuit is GFCI-protected.

• RMC

• UF Cable

• Any of these

• PVC

As shown in Figure 121.211, a flush-mounted well light is located in the corner of a sidewalk at a home. PVC Schedule 40 will be installed under the 3"-thick sidewalk to get 120-volt power to the light. In inches, what is the minimum depth from the top of the conduit to the top of the sidewalk?

• 6

• 18

• 12

• 4

• 24

What is the minimum depth for 24-VAC irrigation control wiring in the backyard of a residence? The wiring method used is Schedule 40 PVC.

• 6"

• 24"

• 36"

• 18"

Rigid metal conduit installed under a 4-inch concrete slab with no vehicular traffic must be installed at least ___ inches deep.

• 18

• 6

• 4

• 24