35020 Wiring Materials - Raceways & Boxes

A(n) _______ is a metal or nonmetallic enclosed channel for conductors.

Article 100: Raceway

A(n) ______ is a short piece of conduit or tubing that does not exceed 24" in lengths.

Nipple

A total run of PVC shall not exceed _deg of bends.

Art 352.26: 360deg

A(n) _____ assembly is a surface, flush, or freestanding raceway that contains conductors and receptacles.

Art 380: Multioutlet

A(n) _______ is a metallic or nonmetallic trough with a hinged or removable cover designed to house and protect conductors and cables.

Art 376 & 378: Wireway

Aluminum fittings and enclosures shall not be used with Rigid Metal Conduit(RMC).

Art 344.14: FALSE

AC cable shall be installed at least 3/4" back from the finished edge of framing members.

Art 300.4(D): FALSE

Metal Clad Cable (MC) with a smooth sheath shall have a bending radius of a minimum of 10 times the diameter of the cable.

Art 330.24(A)(1): TRUE

The use of Nonmetallic Sheathed cable (NM) in any building or structure designated in NFPA 220 as Type I or II is prohibited unless the NM cables are installed in raceways that are permitted in Type I and II construction.

Art 334.10(5): TRUE

A trolley busway has an open bottom.

Art 368: TRUE

A(n) ____ type conduit body has a hub at both ends.

Art 314.29: C Type

Type USE cable is listed for direct burial.

Art 338.10?: TRUE

An auxiliary gutter shall not extend more than __' beyond the equipment it supplements.

Art 336.12: 30'

A(n)___is a double bend in a raceway.

Art 352.24: Offset

MC Cables is a factory assembly of ___ or more conductors.

Art 330: One

Type NM cable has a flame-retardant and moisture-resistance outer jacket that is restricted to indoor wiring.

Art 334.10: TRUE

Cable tray systems shall be installed as complete systems.

Art 392.18: TRUE

Busways shall be used for indoor work only.

Art 368.10: FALSE

A(n) ______ is any point in the electrical system where current supplies utilization equipment.

Art 100: Outlet

A(n) ________ box is a box in which splices, taps, or terminations are made.

Art 314.70: Junction

Intermediate Metal Conduit (IMC) ^{Article 342}

Raceway made of steel, threadbare, frequently used because of its excellent protective qualities, large internal diameter, and easy installation. Made in trade sizes 1/2” to 6”. Article 100

Rigid Metal Conduit (RMC) _{^{Article 344}}

A threadable raceway of circular cross-section designed for the physical protection and routing of conductors and cables._{^{Article 100}} It is permitted under all atmospheric conditions and in all types of occupancies per 344.10(A).

Rigid Polyvinyl Chloride (PVC) Conduit

Conduit made of materials other than metal designed for the installation of electrical conductors and cables.

What is required by NEC 314.28(A)(1) for straight pulls?

The box must be at least 8 times the largest raceway entering the box.

How do you find the minimum box size for angle pulls under NEC 314.28(A)(2)?

6x the largest raceway + the sum of the other Raceways on the same wall.

What are typical minimum bending rules for Armored Cable (AC) under 330.24(A)

Bending radius must be at least 5x the cable diameter

What is the required MC bending radius under 320.24 (A) (1)

Bending radius for smooth sheath: 

Under 3/4” : Radius = 10 × D

¾ - 1.5” : Radius = 12 x D

1.5” + : Radius = 15 x D

How often must EMT be supported according to 358.30 (A)

Within 3ft of each outlet box and at intervals not exceeding 10ft