Quiz 9

b. 8

A 411/16 square box that is 21/8" deep already contains two receptacles, two internal cable clamps, four 12 AWG THHN copper conductors (2 black and 2 white), two grounding conductors, three wire nuts, two pigtails, and one equipment bonding jumper. (A flat plaster ring was used to secure the receptacles to the box.) How many more 12 AWG THHN copper conductors can be added to this box? Select one: a. 7 b. 8 c. 5 d. 9 e. 6

a. knob and tube wiring

A metal box or terminal fitting having separately bushed holes for each conductor shall be used whenever change is made from conduit to ___. Select one: a. knob and tube wiring b. non-metallic sheathed cable c. type AC cable d. type MC cable

a. 6

An office building has a 24-volt branch circuit installed for landscape lighting around the front of the building. The circuit was installed in UF cable which requires a minimum burial depth of ___ inches for this circuit. Select one: a. 6 b. 8 c. 12 d. 24

c. 24

Conductor Set 1 enters and exits the box through the 2-inch conduits. Conductor Set 2 enters and exits the box through the 3-inch conduits. All conductors are 2 AWG. The minimum dimension for X in Figure 419-01 is ___ inches. Select one: a. 20 b. 26 c. 24 d. 15 e. 12

a. it is not guarded by locked doors

Equipment is considered to be accessible when ___. Select one: a. it is not guarded by locked doors b. a ladder is required to reach it c. it is not equipped with a locking cover d. both a and b

d. used for pendants, wiring of luminaires, and the connection of portable lamps

Except where ___, flexible cords shall not be used unless specifically permitted. Select one: a. used as a substitute for fixed wiring b. run through holes in walls c. attached to the building surface d. used for pendants, wiring of luminaires, and the connection of portable lamps

c. NFPA Regulations Governing Committee Projects

Formal interpretations of the Code may be found in the ___. Select one: a. National Electrical Code Handbook b. OSHA Standards c. NFPA Regulations Governing Committee Projects d. Life and Safety Handbook

b. 5

Given: A metal junction box has 27 cubic inches and contains a total of six 12 AWG wires. Additional conductors size 10 AWG need to be added in the box. No grounding conductors, devices or fittings are contained in the box. What is the MAXIMUM number of 10 AWG conductors that may be added to this box? Select one: a. 2 b. 5 c. 6 d. 8

e. 6

In pull boxes or junction boxes having any dimension over ___ ft, all conductors shall be cabled or racked up in an approved manner. Select one: a. 1.8 b. 3 c. 4 d. 5 e. 6

d. acceptable to the authority having jurisdiction

In the NEC®, approved means ___. Select one: a. listed by a Nationally Recognized Testing Laboratory (NRTL) b. acceptable to the National Electrical Code® c. acceptable to the architect or engineer designing the job d. acceptable to the authority having jurisdiction

e. 90ºC - 60ºC

When armored cable installed is installed in thermal insulation, the rating of the contained conductors shall be ___, and the ampacity of these applications shall be that of ___ conductors. Select one: a. 90ºC - 75ºC b. 60ºC - 75ºC c. 75ºC - 90ºC d. 60ºC - 90ºC e. 90ºC - 60ºC f. 60ºC - 60ºC

b. twice

When conduit bodies contain 6 AWG and smaller conductors, the conduit bodies shall have a cross-sectional area at least ___ that of the largest conduit to which they are connected. Select one: a. 100% b. twice c. 40% d. 75%

e. 6

Where Type AC cable is installed as a "fixture whip" between a 1900 box and a luminaire, the cable is permitted to be unsupported, except by the connectors, provided the "whip" is not longer than ___ feet and the luminaire is installed in a lay-in ceiling. Select one: a. 1.5 b. 8 c. 3 d. 2 e. 6

a. Direct-buried conductors are required to be spliced in a splice box.

Which of the following is a false statement? Select one: a. Direct-buried conductors are required to be spliced in a splice box. b. Direct-buried conductors are permitted to be soldered. c. Where wire connectors are used for splicing direct-buried conductors, the connectors must be listed for such use. d. Where necessary to prevent physical damage, direct-buried conductors shall be protected by raceways, boards, sleeves, or other approved means.

a. The authority having jurisdiction

___ has the power to grant special permission, often involving exceptions to NEC® rules or other customary guidelines. Select one: a. The authority having jurisdiction b. NFPA c. OSHA d. any of these