4.2.11 Overstressing Equipment. The aerial platform and insulating section of the
aerial-lift equipment shall not be overstressed by attempting to lift or support weights
(test loads may be in excess) in excess of the manufacturer's rating. To protect the
fiberglass parts, none of the aerial platform, or insulating section of the aerial-lift
equipment, shall be used as a fulcrum for prying or lifting. Where a short auxiliary
insulated boom is provided, it may be used for lifting or supporting procedures if
permitted by the operating office.
aerial-lift equipment shall not be overstressed by attempting to lift or support weights
(test loads may be in excess) in excess of the manufacturer's rating. To protect the
fiberglass parts, none of the aerial platform, or insulating section of the aerial-lift
equipment, shall be used as a fulcrum for prying or lifting. Where a short auxiliary
insulated boom is provided, it may be used for lifting or supporting procedures if
permitted by the operating office.
4.2.12 Testing of Aerial-lift Equipment. In addition to the preoperative tests required
in
in
and tested in accordance with subsection 4.8.2.
4.3
INSULATING LADDERS
4.3.1 Voltage Limitation. Insulating ladders may be used as personnel support for
work performed by the barehand technique on circuits or equipment with a phase-to-
phase voltage rating exceeding 30 kilovolts, provided minimum distances specified
in subsection 4.1.9 are maintained.
work performed by the barehand technique on circuits or equipment with a phase-to-
phase voltage rating exceeding 30 kilovolts, provided minimum distances specified
in subsection 4.1.9 are maintained.
4.3.2 Operating Practices. Only certified personnel shall perform live-line work from
energized insulating ladders, except (1) that during training
energized insulating ladders, except (1) that during training
periods, a workman undergoing training may practice mounting and dismounting and
dismounting the insulating ladder and may perform specific work from an energized
insulating ladder; and (2) when it is necessary that an engineer or other specialist
participate in a specific test or inspection program involving the use of an energized
insulating ladder, such specialist need not be a certified workman as specified in
dismounting the insulating ladder and may perform specific work from an energized
insulating ladder; and (2) when it is necessary that an engineer or other specialist
participate in a specific test or inspection program involving the use of an energized
insulating ladder, such specialist need not be a certified workman as specified in
4.3.3 Additional Requirements. The following requirements shall be observed in
addition to
addition to
a. Preoperative Tests.- Tests shall be made before starting work each day, each
time during the day when a higher voltage is going to be worked, and when changed
conditions indicate a need for additional tests. A microammeter designed for use
with insulating ladders shall be used for testing the dielectric current through the
ladder legs with all legs bonded together at the metering point. If the measured
dielectric current after 1 minute is less than 0.333 microampere for each kilovolt of
nominal phase-to-phase voltage, the insulating ladder may be placed and the work
started. A written record of these tests shall be maintained both with the equipment
and in the responsible operating office. Work operations shall be suspended
immediately upon indication of a malfunction in the equipment.
time during the day when a higher voltage is going to be worked, and when changed
conditions indicate a need for additional tests. A microammeter designed for use
with insulating ladders shall be used for testing the dielectric current through the
ladder legs with all legs bonded together at the metering point. If the measured
dielectric current after 1 minute is less than 0.333 microampere for each kilovolt of
nominal phase-to-phase voltage, the insulating ladder may be placed and the work
started. A written record of these tests shall be maintained both with the equipment
and in the responsible operating office. Work operations shall be suspended
immediately upon indication of a malfunction in the equipment.
15 (FIST 3 - 29 5/90)