Electrical Codes & Standards Flashcards

Under NEC 225.30, what is the maximum number of branch circuits or feeders permitted to supply a separate building from a single source?

Answer: One

NEC 225.30 generally limits the supply to a separate building to one feeder or branch circuit, with specific exceptions.

According to NEC 240.4(D), small conductors such as 14 AWG copper must be protected by an overcurrent device rated no more than how many amperes?

Answer: 15A

NEC 240.4(D) limits OCPD protection for 14 AWG copper to 15 amperes maximum.

Which NEC article provides installation requirements for electrical vehicle supply equipment (EVSE)?

Answer: Article 625

NEC Article 625 covers electric vehicle charging systems, including supply equipment and wiring methods.

NEC 358 covers which type of raceway?

Answer: Electrical metallic tubing (EMT)

NEC Article 358 covers Electrical Metallic Tubing (EMT), including its use, installation, and fittings.

Under NEC 406.9, which type of receptacle is required for 15A and 20A, 125V outdoor receptacles exposed to weather while in use?

Answer: In-use weatherproof cover (while-in-use)

NEC 406.9(B) requires outdoor receptacles exposed to weather while a cord is plugged in to have an in-use (while-in-use) weatherproof cover.

What UL standard covers the listing requirements for panelboards used in commercial and residential installations?

Answer: UL 67

UL 67 is the standard for panelboards, covering construction and performance requirements for listed panelboard equipment.

Per NEC 410.116, luminaires installed in a clothes closet must maintain a minimum clearance of how many inches from the nearest point of a storage area for a recessed incandescent fixture?

Answer: 12 inches

NEC 410.116(B) requires recessed incandescent luminaires to be at least 12 inches from the closest point of the storage space.