Steven Owen

Code Quiz: Pull Boxes for Fixed Electric Heating Systems
NEC requirements regarding pull boxes for fixed electric heating systems
Code Quiz: Grounding Requirements for Switches 1
NEC guidelines on grounding requirements for switches
Code Quiz: Snap Switches 1
NEC guidelines on snap switches
Code Quiz: Definition of Patient Bed
NEC guidelines on the definition of a patient bed and when a table is considered to be a bed location
Code Quiz: Name That Article
Which Article of the 2011 NEC consists of only two sections, uses the word "specific" in the title, and makes reference to seven other Articles in the Scope statement?
Code Quiz: Position of Receptacle Faces

Fill in the blank with the appropriate answer.

Excluding any exception(s), after installation, receptacles __________ faceplates of insulating material, and shall project a minimum of 0.015 in. from metal faceplates.

Code Quiz: Mounting Receptacles
When mounting receptacles in boxes that are set back from the finished surface as permitted in 314.20, the receptacles shall be installed so that the mounting yoke or strap of the receptacle is _________ .
Code Quiz: Door Stops and Cover Plates 1

Fill in the blank with the appropriate answer.

When installing metal-clad power switchgear (greater than 600V), the external hinged doors or covers must be  ___________ .

A. provided with stops to hold them in the open position

B. provided with a full-length hinge

C. lockable.

D. Provided with a viewing window

Answer: A

Code Quiz: Underground Wiring in Class I, Division 1 Locations

When installing polyvinyl chloride conduit (PVC) or reinforced thermosetting resin conduit (RTRC) as a Class I, Division 1 wiring method for an underground installation in a tank farm area, which statement is not true?

A. The conduit(s) must be installed with 24 in. of cover over the top of the concrete, which encases the conduit.

B. The conduit(s) must be covered by at least 2 in. of concrete.

C. The conduit(s) must be encased in a concrete envelope by at least 2 in. of concrete.

Code Quiz: Underground Wiring

When installing PVC conduit or RTRC as an approved wiring method in an underground installation to supply a gasoline dispensing device at a gas station, which statement is true?

Code Quiz: Duct Material Type 1

Fill in the blank with the appropriate answer.

When installing a ventilating duct in a transformer vault, per Part III of Art. 450, the duct shall be constructed of material that is ____________.

A. Acceptable to the Authority Having Jurisdiction (AHJ)

B. suitable

C. fire resistant

D. flame retardant

Answer: C

Code Quiz: Transformer Disconnecting Means 2

Fill in the blanks with the appropriate answer.

When installing a transformer (such as a 75kVA unit), the disconnecting means for this piece of equipment shall be _________, and the location of the disconnecting means shall be ______ marked on the transformer.

A. approved / properly

B. lockable / field

C. suitable / suitability

D. lockable / factory

Answer: B

Code Quiz: Instrumentation Tray Cable

Fill in the blank with the appropriate answer.

Type ITC cables (instrumentation tray cable) shall not be installed with power, lighting, or Class 1 circuits that are not power limited, or non-power-limited circuits, except ___________ .

A. where terminated within equipment or junction boxes and separations are maintained by insulating barriers or other means.

B. where a metallic sheath or armor is applied over the nonmetallic sheath of the Type ITC cable.

C. as permitted by B or C.

Answer: C

Code Quiz: Securing Requirements for MC Cable 3

Q. When installing a manufactured wiring system, which uses a 4-conductor 10 AWG MC cable, what are the securing requirements for this type of cable?

A. At intervals not to exceed 6 ft, and within 12 in of every box, cabinet, fitting, or other cable termination.

B. At intervals not to exceed 1.8 m, and within 300 mm of every box, cabinet, fitting, or other cable termination.

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