with no insulation value is permissible only if the insulator(s) being shunted is the
insulator(s) with no insulation value, or if work is being performed between properly
installed surge limiting devices.
insulator(s) with no insulation value, or if work is being performed between properly
installed surge limiting devices.
4.2
INSULATED AERIAL-LIFT EQUIPMENT (VEHICLE-MOUNTED)
NOTE: As used in this section, the term "aerial-lift platforms" includes "aerial-lift
buckets."
buckets."
4.2.1 Voltage Limitation. The live-line barehand technique using aerial-lift platforms is
limited to use on energized circuits with a line-to-line voltage rating exceeding 30
kilovolts.
limited to use on energized circuits with a line-to-line voltage rating exceeding 30
kilovolts.
4.2.2 Operating Practices. Normally two certified persons should be on the aerial
platform at the worksite whenever this technique of live-line barehand work is being
used, except (1) that during training periods the occupant(s) may be uncertified while
undergoing instructions; (2) when it is deemed necessary that a specific individual,
such as an engineer or other specialist, participate during a test or inspection
program, such occupant need not necessarily be a trained individual; and (3) with
the specific prior approval of the foreman's supervisor, special work on transmission
lines or in substations may be performed with a single workman aloft. The number of
certified personnel required on the aerial platform shall be dictated by the type of
aerial-lift equipment being used, the physical and technical difficulty of the work to
be performed, and the distance restrictions surrounding the work area. When two or
more workmen are on the aerial platform, they shall work together as a team.
platform at the worksite whenever this technique of live-line barehand work is being
used, except (1) that during training periods the occupant(s) may be uncertified while
undergoing instructions; (2) when it is deemed necessary that a specific individual,
such as an engineer or other specialist, participate during a test or inspection
program, such occupant need not necessarily be a trained individual; and (3) with
the specific prior approval of the foreman's supervisor, special work on transmission
lines or in substations may be performed with a single workman aloft. The number of
certified personnel required on the aerial platform shall be dictated by the type of
aerial-lift equipment being used, the physical and technical difficulty of the work to
be performed, and the distance restrictions surrounding the work area. When two or
more workmen are on the aerial platform, they shall work together as a team.
4.2.3 Grounding and Outriggers. Before the aerial platform is elevated, the
outriggers on the vehicle shall be extended and adjusted to stabilize the vehicle, and
the body of the vehicle shall be properly grounded with a minimum 1/0 AWG extra-
flexible copper or equivalent ground lead. The ground should be attached to a
ground rod by the side of and near the vehicle center. In no case shall the ground
lead be attached to a nearby structure or pole ground, except in a substation or
switchyard equipped with a groundmat, a ground of 10 feet or less may be
connected to the nearest structure ground or in an area on concrete or on solid rock,
where it is impossible to drive a ground rod, the closest available ground may be
used. When two or more aerial lift devices are being used and it is possible for a
workman to bridge the gap between the devices, they shall be bonded together or
ground leads connected to the same ground rod located between the two aerial lift
devices.
outriggers on the vehicle shall be extended and adjusted to stabilize the vehicle, and
the body of the vehicle shall be properly grounded with a minimum 1/0 AWG extra-
flexible copper or equivalent ground lead. The ground should be attached to a
ground rod by the side of and near the vehicle center. In no case shall the ground
lead be attached to a nearby structure or pole ground, except in a substation or
switchyard equipped with a groundmat, a ground of 10 feet or less may be
connected to the nearest structure ground or in an area on concrete or on solid rock,
where it is impossible to drive a ground rod, the closest available ground may be
used. When two or more aerial lift devices are being used and it is possible for a
workman to bridge the gap between the devices, they shall be bonded together or
ground leads connected to the same ground rod located between the two aerial lift
devices.
4.2.4 Preoperative Tests. Before moving the aerial-lift equipment into the work
position, all controls (ground level and bucket or platform) shall be checked. In
position, all controls (ground level and bucket or platform) shall be checked. In
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