228.2

AØ

Shown above is 42-Circuit Panelboard L. It is fed from a 120/240-volt, 1Ø, 3-wire utility transformer. Circuit number 42 is connected to ___.

both Arc-fault circuit protection Tamper-resistant

A 120V clothes dryer receptacle located in a finished basement laundry room requires the following:

IV only

A 5-gang box and a partition are shown above in Figure 210.5. The box will contain single-pole switches A, B, C, D & E that are fed from the following circuits that originate in a 277/480-volt, 3Ø, 4-wire panelboard: Switches A and B are fed from Circuit 1 Switches C and D are fed from Circuit 7 Switch E is fed from Circuit 10 The NEC® requires that partitions be installed between switches ___.I. A & B II. B & C III. C & D IV. D & E

is required

A cover that maintains the weatherproof integrity of the receptacle ___ to be installed when an outdoor receptacle is used for the permanent connection of a cord from a lawn sprinkler system.

hospital grade

A receptacle with a green dot on an ivory face would be a(n) ___ receptacle.

B

A switchboard is fed from a 3-phase, 4-wire, delta-connected system. The ___ phase shall be the phase having the higher voltage to ground.

408

Article ___ in the NEC® concerns switchboards. A switchboard is shown above in Figure 210.9.

grounded

For lighting circuits, NEC® Section 404.2(C) requires a(n) ___ conductor to be provided in each switch box or enclosure.

are not

GFCI-protected receptacles ___ permitted to be installed within a tub or shower space.

both I and II

If a common-trip 2-pole breaker is used for a 1Ø, 208-volt circuit, ___. I. both "hots" will open when a short circuit or ground fault occursII. both "hots" can be manually opened

top

In a 3Ø switchboard that has horizontal busbars, the AØ feeder conductor is connected to the ___ busbar.

ungrounded

In general, switches shall be so wired that all switching is done in the ___ conductor.

an orange triangle

Isolated ground receptacles are identified by ___.

either I or II

Refer to Figure 210.19. If the incoming service is 120/208, the NEC® permits the panelboard to be rated for ___ volts. I. 250 II. 600

5

Refer to Figure 210.6, shown above. The conductors connected to the terminal lugs are 350 kcmil. The minimum wire bending space required at I is ___ inches. These lugs are NOT removable.

9

Refer to Figure 210.6, shown above. The conductors connected to the terminal lugs are 350 kcmil. The minimum wire bending space required at II is ___ inches. These lugs are of the lay-in type.

CØ

Shown above is 42-Circuit Panelboard HB. It is fed from a 277/480-volt, 3Ø, 4-wire utility transformer bank. Circuit number 41 is connected to ___.

6 ft-7 in

The main service disconnect handle (fused pullout or main breaker) shall not be positioned higher than ___ above the floor.

I, II, and III

The phase arrangement on 3-phase buses shall be A, B, C from ___, as viewed from the front of the switchboard or panelboard. I. front to back II. top to bottom III. left to right

four

The receptacle, shown at II in Figure 211.9, will be installed in a metal box. The box will be connected to the panelboard with PVC. The minimum number of conductors that are required to be pulled into the PVC is ___.

only in the ungrounded circuit conductor

Three-way and four-way switches shall be wired so that all switching is done ___.

No

When raised covers ("industrial covers") are used for receptacles, does the Code permit fastening the receptacle to the cover with just the one center 6/32 screw (as shown)?

300

Where (snap) switches are installed in multigang boxes without permanent barriers (partitions) the maximum voltage between adjacent switches is ___ volts.

I, II & III

Wiring devices that are marked with CO/ALR are suitable for use with ___ conductors. I. aluminum II. copper III. copper-clad aluminum