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T e r e x S o u t h D a k o t a , I n c .
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The fiberglass boom and platform liners must be dielectrically tested periodically
to insure the insulating properties are being maintained.
Do not assume that it is so.
Ground personnel must be warned to stay away from vehicle in case of accidental
boom contact between conductor and metallic portion of boom, which will cause
serious injury or death.
The fiberglass upper boom, fiberglass lower boom insert and fiberglass platform,
including its components, do not protect the platform operator from injury in case
of contact between two energized lines or between an energized line and a
grounded conductor.
Upper Controls can become energized if any part of the boom-tip past the band of
arrows on the boom contacts a conductor. The Aerial Device upper control station
has metal parts that are necessary to provide the structural support for the
components. These metal parts at the boom-tip are interconnected. The main shaft
that supports the platform(s) and controls also support other load carrying options
that can be added to the boom-tip.
Do not depend on Aerial Device covers for insulation. Plastic or fiberglass covers
offer limited electrical insulation. Covers are not tested, certified or maintained as
insulation.
All conductors including grounds and neutral lines are current carrying
conductors and must be treated as energized unless properly grounded and
tested.
The fiberglass upper and lower boom, in a well maintained condition, provides
electrical insulation between the upper boom-tip and the vehicle to ground. This
fiberglass will not protect the platform operator if any portion of the boom tip or
upper arm control station, including options is brought into contact with an
energized or non-energized conductor and the operator is in contact with a
different potential, such as grounded non-energized conductor. This type of
contact can energize or ground the controls because all components of the upper
control station are interconnected. The fiberglass will not provide protection for
the operator in phase to phase contact or a phase to ground wire contact above
the upper boom insulation. Nor will it protect the vehicle from becoming energized
if the steel boom section below the lower boom insert, if so equipped, is brought
into contact with an energized conductor. Serious injury or death could result.
