Understanding NEC Articles 320 & 330

Question 1

Article _____ covers the use installation and construction specifications for armored cable Type AC.
Answer 1: 300
Answer 2: 310
Answer 3: 320
Answer 4: 334

Answer 1

Answer 3: 320

320.1

Question 2

Type AC cable is permitted in _____.
Answer 1: wet locations
Answer 2: corrosive conditions
Answer 3: damp locations
Answer 4: cable trays

Answer 2

Answer 4: cable trays

320.10(2)

Question 3

Armored cable shall not be installed _____.
Answer 1: in damp or wet locations
Answer 2: where subject to physical damage
Answer 3: where exposed to corrosive conditions
Answer 4: all of these

Answer 3

Answer 4: all of these

320.12(1), (2), and (4)

Question 4

Where Type AC cable is run across the top of a framing member(s) in an attic space not accessible by permanently installed stairs or ladders guard strip protection shall only be required within _____ of the scuttle hole or attic entrance.
Answer 1: 3 ft
Answer 2: 4 ft
Answer 3: 5 ft
Answer 4: 6 ft

Answer 4

Answer 4: 6 ft

320.23(A)

Question 5

Type AC cable fittings shall not be permitted as a means of cable support.
Answer 1: TRUE
Answer 2: FALSE

Answer 5

Answer 2: FALSE

320.30(A)

Question 6

Armored cable used to connect recessed luminaires or equipment within an accessible ceiling can be unsupported and unsecured for lengths up to _____.
Answer 1: 2 ft
Answer 2: 3 ft
Answer 3: 4½ ft
Answer 4: 6 ft

Answer 6

Answer 4: 6 ft

320.30(D)(3)

Question 7

Type AC cable installed in thermal insulation shall have conductors that are rated at 90°C. The ampacity of the cable in this application shall not exceed that of a _____ rated conductor.
Answer 1: 60°C
Answer 2: 75°C
Answer 3: 90°C
Answer 4: 100°C

Answer 7

Answer 1: 60°C

320.80(A)

Question 8

Type AC cable shall provide an adequate path for _____ to act as an equipment grounding conductor.
Answer 1: fault current
Answer 2: short-circuit current
Answer 3: overcurrent
Answer 4: arcing current

Answer 8

Answer 1: fault current

320.108

Question 9

Type MC cable shall be permitted for _____.
Answer 1: branch circuits
Answer 2: feeders
Answer 3: services
Answer 4: any of these

Answer 9

Answer 4: any of these

330.10(A)(1)

Question 10

MC cable is permitted for use in damp or wet locations where a corrosion-resistant jacket is provided over the metallic covering and _____.
Answer 1: the metallic covering is impervious to moisture.
Answer 2: a jacket resistant to moisture is provided under the metal covering.
Answer 3: the insulated conductors under the metallic covering are listed for use in wet locations.
Answer 4: any of these

Answer 10

Answer 4: any of these

330.10(A)(11)

Question 11

Smooth-sheath Type MC cable with an external diameter not greater than ¾ in. shall have a bending radius not less than _____ times the external diameter of the cable.
Answer 1: five
Answer 2: ten
Answer 3: twelve
Answer 4: thirteen

Answer 11

Answer 2: ten

330.24(A)(1)

Question 12

Bends made in interlocked or corrugated sheath Type MC cable shall have a radius of at least _____ times the external diameter of the metallic sheath.
Answer 1: five
Answer 2: seven
Answer 3: ten
Answer 4: twelve

Answer 12

Answer 2: seven

330.24(B)

Question 13

Type MC cable fittings shall be permitted as a means of cable support.
Answer 1: TRUE
Answer 2: FALSE

Answer 13

Answer 1: TRUE

330.30(A)

Question 14

Unless otherwise permitted in the Code Type MC cable shall be secured at intervals not exceeding _____.
Answer 1: 3 ft
Answer 2: 4 ft
Answer 3: 6 ft
Answer 4: 8 ft

Answer 14

Answer 3: 6 ft

330.30(B)

Question 15

Unless otherwise permitted in the Code Type MC cable installed horizontally through wooden or metal framing members is considered secured and supported where such support does not exceed _____ intervals.
Answer 1: 3-ft
Answer 2: 4-ft
Answer 3: 6-ft
Answer 4: 8-ft

Answer 15

Answer 3: 6-ft

330.30(C)