6 December 2006
Including change 1, 7 December 2006
USACE--U.S. Army Corps of Engineers
V/M--Volts Per Meter
VAC--Volts Alternating Current
VDC--Volts Direct Current
VRLA--Valve-Regulated Lead Acid
Note: The terms listed here are provided for clarification of the design criteria
provided in this UFC. Refer to IEEE 100, IEEE Standard Dictionary of Electrical
and Electronics Terms, for additional electrical-related definitions.
Accessible(as applied to equipment.) --. Admitting close approach; not guarded by
locked doors, elevation or other effective means.
Ampacity--The current, in amperes, that a conductor can carry continuously under the
conditions of use without exceeding its temperature rating.
Approved--Sanctioned, endorsed, accredited, certified, or accepted as satisfactory by
a duly constituted and nationally recognized authority or agency.
Arc Duration--The time span of an arc from initiation to extinction, usually specified as
a number of cycles of 60 Hz current.
Arc Energy--The total energy discharged to a surrounding area by an electric arc.
Arc Thermal Protective Value--For protective clothing is the minimum incident
thermal energy that causes the onset of a second degree burn based on the energy
transmitted through the clothing.
Area of Refuge--A floor or fully sprinklered building that has at least two accessible
rooms or spaces separated from each other by smoke partitioning; or a space in a
means of egress that is protected from the effects of fire and smoke, either by
separation from the other spaces in the same building or by virtue of location, thereby
permitting delay in egress travel from any level.
Authorized Person--A person approved or assigned by a supervisor to perform a
specific duty or duties or to be at a specific location or locations at the job site.