Definitions cont'd - hdbk10920283

DOE-HDBK-1092-98

Vented vault--A vault that has provision for air changes using exhaust flue stacks and low level air

intakes operating on differentials of pressure and temperature providing for airflow which precludes

a hazardous atmosphere from developing.

Voltage--The effective (rms) potential difference between any two conductors or between a

conductor and ground. Voltages are expressed in nominal values unless otherwise indicated. The

nominal voltage of a system or circuit is the value assigned to a system or circuit of a given voltage

class for the purpose of convenient designation. The operating voltage of the system may vary above

or below this value.

DEFINITIONS APPLICABLE TO 29 CFR 1926 SUBPART K

Acceptable--An installation or equipment is acceptable to the Assistant Secretary of Labor, and

approved within the meaning of this Subpart K:

a. If it is accepted, or certified, or listed, or labeled, or otherwise determined to be safe by a qualified

testing laboratory capable of determining the suitability of materials and equipment for

installation and use in accordance with this standard; or

b. With respect to an installation or equipment of a kind which no qualified testing laboratory

accepts, certifies, lists, labels, or determines to be safe, if it is inspected or tested by another

Federal agency, or by a State, municipal, or other local authority responsible for enforcing

occupational safety provisions of the National Electrical Code, and found in compliance with

those provisions; or

c. With respect to custom-made equipment or related installations which are designed, fabricated

for, and intended for use by a particular customer, if it is determined to be safe for its intended

use by its manufacturer on the basis of test data which the employer keeps and makes available

for inspection to the Assistant Secretary and his authorized representatives.

Accepted--An installation is "accepted" if it has been inspected and found to be safe by a qualified

testing laboratory.

Accessible--(As applied to wiring methods.) Capable of being removed or exposed without

damaging the building structure or finish, or not permanently closed in by the structure or finish of

the building. (See "concealed" and "exposed.")

Accessible--(As applied to equipment.) Admitting close approach; not guarded by locked doors,

elevation, or other effective means. (See "Readily accessible.")

Ampacity--The current in amperes a conductor can carry continuously under the conditions of use

without exceeding its temperature rating.

Appliances--Utilization equipment, generally other than industrial, normally built in standardized

sizes or types, which is installed or connected as a unit to perform one or more functions.

Approved--Acceptable to the authority enforcing this Subpart. The authority enforcing this Subpart

is the Assistant Secretary of Labor for Occupational Safety and Health. The definition of "acceptable"

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