NEC 440-480

The emergency disconnect required for one- and two-family dwelling storage battery systems, shall be labeled _____.

"EMERGENCY DISCONNECT"

For battery racks, there shall be a minimum clearance of _____ in. between a cell container and any wall or structure on the side not requiring access for maintenance.

1

The provisions of Article _____ apply to stationary installations of storage battery installations.

480

Dry-type transformers 1,000V, nominal, or less, and not exceeding _____ kVA that are installed in hollow spaces of buildings and not permanently closed in by the structure, shall not be required to be readily accessible.

50

The disconnecting means for air-conditioning and refrigerating equipment shall be readily accessible and not more than _____ ft from the air-conditioning or refrigerating equipment.

50

Multimotor and combination-load air-conditioning equipment shall be provided with a visible nameplate marked with the minimum supply circuit conductor ampacity, the maximum rating of the branch-circuit short-circuit and ground-fault protective device.

true

Nominal battery voltage is typically _____.

all of these

The rules of Article _____, as applicable, shall apply to air-conditioning and refrigerating equipment that does not incorporate a hermetic refrigerant motor-compressor.

any of these

Nominal battery voltage, as it relates to storage batteries, is the value of a(an) _____ of a given voltage class for convenient designation.

cell or battery

Where air-conditioning and refrigeration equipment is installed outdoors on a roof, a(an) _____ conductor of the wire type shall be installed in outdoor portions of metallic raceway systems that use compression-type fittings.

equipment grounding

Provisions appropriate to the storage battery technology shall be made for sufficient diffusion and ventilation of gases from the battery, if present, to prevent the accumulation of a(an) _____ mixture.

explosive

For transformers, other than Class 2 and Class 3, a means is required to disconnect all transformer ungrounded primary conductors. The disconnecting means shall be located within sight of the transformer unless the disconnect _____.

location is field marked on the transformer and is lockable open in accordance with 110.25

Transformers with ventilating openings shall be installed so that the ventilating openings are _____.

not blocked by walls or obstructions

Conductors are commonly _____ to eliminate stress on storage battery terminations.

preformed

A storage battery is a single or group of _____ cells connected together electrically in series, in parallel, or a combination of both, and comprised of lead-acid, nickel-cadmium, or other rechargeable electrochemical types.

rechargeable

Transformer top surfaces that are horizontal and readily accessible shall be marked _____.

to prohibit storage

Article 440 applies to electric motor-driven air-conditioning and refrigerating equipment that has a hermetic refrigerant motor-compressor.

true

Metallic structures for the support of storage batteries shall be provided with nonconducting support members for the cells or shall be constructed with a continuous insulating material and paint alone shall not be considered as an insulating material.

true

Wiring and equipment supplied from storage batteries shall be in accordance with Chapters 1 through 4 of the NEC unless otherwise permitted by 480.6.

true

The equipment grounding conductor terminal bar of a dry-type transformer shall be bonded to the enclosure in accordance with 250.12 and shall not be installed on or over any _____.

vented portion of the enclosure