NEC Article 110

For large equipment that contains service disconnecting means installed in accordance with 230.71 where the combined ampere rating is _____ or more and over 6 ft wide, there shall be one entrance to and egress from the required working space not less than 24 in. wide and 6 1/2 ft high at each end of the working space

1,200A

All switchboards, switchgear, panelboards, and motor control centers shall be located in dedicated spaces and protected from damage and the working clearance space for outdoor installations shall include the zone described in _____.

110.26 (A)

The required working space for access to live parts of equipment operating at 300 volts-to-ground, where there are exposed live parts on one side and grounded parts on the other side, is _____ ft.

3 1/2 ft

The minimum working space on a circuit for equipment operating at 750 volts-to-ground, with exposed live parts on one side and grounded parts on the other side of the working space is ______.

4 ft (110.26 condition 2)

The minimum height of working spaces about electrical equipment, switchboards, panelboards, or motor control centers operating at 1,000V, nominal, or less and likely to require examination, adjustment, servicing, or maintenance while energized shall be 6 1/2 ft or the height of the equipment, whichever is greater, except for service equipment or panelboards in existing dwelling units that do not exceed 200A.

True

All _____ shall be covered with an insulation equivalent to that of the conductors or with an identified insulating device.

a) splices b) joints c) free ends of conductors d) all of these D

Electrical equipment rooms or enclosures housing electrical apparatus that are controlled by a lock(s) shall be considered _____ to qualified persons.

accessible

Separately installed pressure connectors shall be used with conductors at the _____ not exceeding the ampacity at the listed and identified temperature rating of the connector.

ampacities

In judging equipment for approval, considerations such as _____ shall be evaluated.

mechanical strength wire-bending space arcing effects all of these

NFPA 70E, Standard for Electrical Safety in the Workplace, provides guidance, such as determining severity of potential exposure, planning safe work practices, arc-flash labeling, and selecting _____.

nominal system voltage and incident energy levels arc-flash boundaries minimum required levels of personal protective equipmen t110.16(B) Note 3

_____ at other than dwelling units shall be legibly field marked with the available fault current, include the date the fault-current calculation was performed, and be of sufficient durability to withstand the environment involved.

service equipment

Working space shall not be used for _____.

storage

Each disconnecting means shall be legibly marked to indicate its purpose unless located and arranged so _____.

the purpose is evident

Listed or labeled equipment shall be installed and used in accordance with any instructions included in the listing or labeling.

true

The NEC requires tested series-rated installations of circuit breakers or fuses to be legibly marked in the field to indicate the equipment has been applied with a series combination rating.

true