UFC 3-560-01
6 December 2006
Including change 1, 7 December 2006
Note: Insulating aerial devices do not protect personnel from phase to phase or phase
to ground contacts at the platform end. When working from an insulated aerial device
the primary source of insulation will be the insulating protective equipment (personal
protective equipment, line sleeves, live-line tools, and rubber gloves).
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\ Note: Only insulating aerial devices tested and rated for the application and use
provided in Table 10-4 shall be used when working on overhead lines. /1/
10-14.1.2 Insulating device categories are provided in Table 10-3.
Table 10-3. Insulating Device Categories
Category
Description
A
Aerial devices designed and manufactured for work in which the boom is
considered primary insulation (bare-hand work) shall have all conducted
components at the platform end bonded together to accomplish
equipotential of all such components. Devices shall be marked at the
platform indicating such bonding. Aerial devices shall be equipped with
a lower test electrode system.
When these devices are qualified for work above 138 kV, they shall be
equipped with a gradient control device and conductive shield(s) over
the lower test electrode system. For those devices with ratings 138 kV
and below, conducting shield(s) over the lower test electrode system are
required. The necessity of gradient control device is to be determined
by the qualification test.
B
Aerial devices designed and manufactured for work in which the boom is
not considered primary insulation, but secondary, such as that using
insulating (rubber) gloves. Isolation or bonding of the conductive
components at the platform end is not a requirement. Aerial devices
shall be equipped with a lower test electrode system.
C
Aerial devices designed and manufactured for work in which the boom is
not considered primary insulation, but secondary, such as that using
insulating (rubber) gloves. Isolation or bonding of the conductive
components at the platform end is not a requirement.
These aerial devices are not equipped with a lower test electrode
system and are designed for 46kV and below.
Note: Bare-hand work is prohibited.
10-36
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