6 December 2006
Including change 1, 7 December 2006
Qualified--A person with a recognized degree, certificate, or professional standing or
who by knowledge, training, and experience has successfully demonstrated the ability
to solve problems relating to the subject matter, the work, or the project.
Supervisor--Refers to the supervisor of "employees or workers" as used in this
instruction. Generally includes the supervisor responsible for exterior electrical systems,
the zone supervisor or foreman, and the infrastructure support element supervisor.
Titles are necessary to assign specific responsibilities to a specific individual.
Switch--A device for opening and closing or changing the connection of a circuit. In
this instruction, the term is generic for all oil circuit breakers, air switches, network
protectors, disconnects (either fusible or plain), hot clamps, and other devices which
open an electrical circuit.
Restricted Approach Boundary--A shock protection boundary to be crossed by only
qualified persons (at a distance from a live part) which, due to its proximity to a shock
hazard, requires the use of shock protection techniques and equipment when crossed.
Tag--A system or method of identifying circuits, systems, or equipment being worked
Tagging--Placing a safety tag directly on a circuit opening device or equipment for
additional safety to ensure it is not used or its position altered.
Tags--Temporary signs (usually attached to a piece of equipment or part of a structure)
to warn of existing or immediate danger.
Voltage--The effective RMS potential difference between any two conductors or
between a conductor and ground. Voltages are usually listed as nominal values. The
nominal voltage of a system or circuit is the value assigned to a system or circuit of a
given voltage class to provide a convenient nomenclature. The operating voltage of the
system may vary above or below this value.
Working Near (Live Parts)--Any activity inside a Limited Approach Boundary.
Working On (Live Parts)--Coming in contact with live parts with the hands, feet, or
other body parts, with tools, probes, or with test equipment, regardless of the personal
protective equipment a person is wearing.