Quiz – Workplace Safety, 2020 NEC

1. Each multiwire branch circuit shall be provided with a means that will simultaneously disconnect all __________ conductors at the point where the branch circuit originates.

2. When normally enclosed live parts are exposed for inspection or servicing, the working space, if in a passageway or general open space, shall be suitably __________.

3. All lamps for general illumination in temporary wiring installations shall be protected from accidental contact or breakage by a suitable __________ or lampholder with a guard.

4. GFCI protection shall be provided for lighting outlets not exceeding __________ volts installed in crawl spaces.

5. Disconnecting means shall be located within sight from, and __________ from air-conditioning or refrigerating equipment.

6. Panelboards in other than dwelling units that are likely to require examination, adjustment, servicing, or maintenance while energized, shall be field or factory marked to warn __________ persons of potential electric arc flash hazards.

7. If a disconnecting means is required to be lockable open, it shall be capable of being locked in the open position with the provisions for locking remaining in place with or without the __________ installed.

8. For receptacles used during building construction, other than those rated 125-volt, single-phase, 15-, 20-, or 30-ampere; GFCI protection or a(n) __________ equipment grounding conductor program is required.

9. Where the highest continuous current trip setting for which the actual overcurrent device installed in a circuit breaker is rated or can be adjusted is __________ amperes or higher, arc-energy reduction is required.

10. Where two or more branch circuits supply devices or equipment on the same yoke or mounting strap, a means to simultaneously disconnect the ungrounded supply conductors shall be provided at the point at which the branch circuits __________.

11. All switchboards, switchgear, and panelboards supplied by a __________ in other than one- or two-family dwellings shall be permanently marked to indicate each device or equipment where the power originates.