6 December 2006
Including change 1, 7 December 2006
surface of the skin is 1.2 cal/cm2 (5 J/cm2). Within this boundary, workers are required
to wear protective clothing, such as flame resistant shirts and pants and other PPE.
Gloving--A method of performing live-line maintenance on energized electrical
conductors rated above 600 volts and equipment whereby a worker or workers, wearing
specially-made and tested insulating gloves, with or without sleeves, and using cover-up
equipment while supported by the structure or insulated aerial lift equipment, work(s)
directly on the energized electrical conductor or equipment.
Ground--A conducting connection, either intentional or accidental, by which an electric
circuit or equipment is connected to the earth, or to some conducting body of relatively
large extent that serves in place of the earth.
Grounded--An electrical connection that gives a circuit a direct positive path to ground.
Grounded Neutral--A point of an electrical system that is intentionally connected to
Grounded, Solidly--Connected directly through an adequate ground connection in
which no impedance has been intentionally inserted.
Ground-Fault Circuit Interrupter--A device intended for the protection of personnel
that functions to deenergize a circuit or portion thereof within an established period of
time when a current to ground exceeds some predetermined value that is less than that
required to operate the overcurrent protective device of the supply input.
--The thermal intensity
of an arc that
by the amount
transmitted per unit area and per unit of time, measured in calories per square
centimeters per second (cal/cm2/sec).
High Voltage For the purposes of this UFC, high voltage is defined as above 600
volts. IEEE 100 defines a high voltage system with an rms voltage above 72,500 volts.
Horizontal Exit--A passage from one building to an area of refuge and access to a
means of egress (per NFPA 101) in another building on approximately the same level;
or a passage through or around a fire barrier (2 hour minimum) to an area of refuge with
access to a means of egress (per NFPA 101) on approximately the same level in the
same building, that affords safety from fire and smoke originating from the area of
incidence and communicating areas.
as a function
Incident Heat--The energy, measured in calories, on the receiving surface.
Job Hazard Analysis (JHA)--see Job Safety Analysis.