Flashcards: Code Standards Lesson 10

What is the minimum rating required for a receptacle?

a.10 A

b.15 A

c.20 A

d.30 A

A single receptacle connected to a 30-ampere branch circuit must generally have a

rating not less than ? .

a.15 A

b.20 A

c.30 A

d.none of the above

If 15- and 20-ampere duplex receptacles are not marked with “CO/ALR,” they are suitable for use with ? .

a.aluminum conductors only

b.aluminum or copper conductors

c.copper conductors only

d.copper and copper-clad aluminum conductors only

e.copper-clad aluminum conductors only

Duplex receptacles are required to be installed so that the equipment grounding contact

is orientated in which of the following positions?

a.Grounding contact in the down position

b.Grounding contact in the horizontal position

c.Grounding contact in the up position

d.No grounding contact orientation requirements in the NEC

Receptacles mounted in boxes that are flush with the finished surface or project from the finished surface must be installed so that the mounting yoke or strap of the receptacle is held rigidly against the ? .

a.box or box cover

b.extension ring

c.finished surface

d.support means for the box

A ground-fault circuit-interrupter receptacle is a Class A device intended to interrupt the circuit when the current to ground is ? or higher.

a.6 mA

b.20 mA

c.15 A

d.20 A

Isolated ground receptacles are required to be identified by ? .

a.a green dot on the face of the receptacle

b.a triangle symbol on the face of the receptacle

c.an orange triangle on the face of the receptacle

d.the receptacle must be totally orange in color

Isolated ground receptacles are only permitted to be used ? .

a.in data processing (information technology) equipment rooms

b.for sensitive electronic equipment branch circuits

c.where the grounding terminal of the receptacle(s) are connected to ground rods only

d.with equipment grounding conductors of branch circuits that are isolated and installed to

meet the provisions of NEC 250.146(D)

In general, the equipment grounding conductor terminal on a receptacle or switch is required to be identified in accordance with which of the following?

a.A green-colored hexagonal terminal nut that cannot be easily removed

b.A green-colored pressure wire connector

c.A green-colored terminal screw provided with a hexagonal head that cannot be easily

removed

d.Any of the above

Where a grounding means does not exist in a receptacle outlet box, a nongrounding-type

receptacle is permitted to be replaced with a ? .

a.grounding-type receptacle not supplied through a GFCI

b.grounding-type receptacle only

c.nongrounding-type receptacle

d.surge-protective device (SPD) receptacle

Which of the following locations require hospital grade receptacles to be installed?

a.A patient bed location in a critical-care area

b.A patient bed location in a general patient care area

c.An examining room in a doctor’s office

d.Both a. and b.

All 15- and 20-ampere receptacles installed in a wet location are required to be provided with which type of cover?

a.A cover that is weatherproof when no attachment plug is inserted

b.A damp location cover

c.A listed outlet hood identified as “extra-duty” with an enclosure that is weatherproof,

whether or not an attachment plug is inserted

d.A standard weatherproof cover that is not weatherproof when an attachment plug is

inserted

What is the maximum cord- and plug-connected load permitted on 20-ampere duplex receptacles connected to a 20-ampere branch circuit where more than two receptacles connect to this branch circuit?

a.12 A

b.15 A

c.16 A

d.20 A

The ampere rating of a range receptacle shall be permitted to be based on a singlerange demand load as specified in NEC Table 220.55.

a. True

b. False

NEC Reference

What is the minimum size aluminum equipment grounding conductor for an individual branch circuit supplying a twist-lock receptacle rated at 20 amperes?

a.14 AWG

b.12 AWG

c.10 AWG

d.8 AWG

All 15- and 20-ampere receptacles installed in wet or damp locations are required to meet which of the following?

a.They shall be listed weather-resistant type.

b.They shall be locking type.

c.They shall be water tight.

d.They shall be waterproof.

Receptacles listed as tamper-resistant are not required in ? .

a.dwelling unit bedrooms

b.dwelling unit kitchens

c.patient care areas of pediatric wards

d.restaurant dining rooms

Which of the following receptacles are generally required to be listed as weatherresistant?

a.15A, 125V locking receptacles indoors

b.20A, 125V non-locking receptacles outdoors

c.20A, 250V locking receptacles outdoors

d.30A, 250V non-locking receptacles outdoors

Which UL Standard is used to evaluate and list receptacles?

a.UL 20

b.UL 489

c.UL 498

d.UL 891

When attaching receptacles or covers to outlet boxes, what type of screw is acceptable per NEC 314.25?

a.Drywall screws

b.In accordance with the manufacturer's instructions

c.Machine screws matching the thread gauge or size integral to the box

d.Whatever is on hand

e.Both b. and c.

In new construction, when is an AFCI receptacle on its own (without an AFCI circuit breaker) permitted as a method of protection?

a. As the first outlet in a branch circuit, fed by cable in conduit from the panel

b. As the first outlet in a branch circuit, fed by MC cable from the panel

c. On a 30A circuit

d. When listed in a system combination rating with a standard circuit breaker

e. a., b., and d.