DIGGER DERRICK
1-57
Digger Derrick Terex South Dakota, Inc. 463280 - 9/14
OPERATION GUIDELINES
DANGER LABEL ABOUT OCCUPANTS OF THE PLATFORM
Platform insulation must never be depended upon when operating in an electrical
environment. A tested liner is the only component offering insulation.
If the Digger Derrick has a section that is manually extended, the pin that locks the
manual section in the extended position must be installed. If not pinned, the
manual section will retract and can result in serious injury or death.
When using the Digger Derrick as an insulated aerial platform, the Digger Derrick
must have a fiberglass section and it shall be fully extended to provide maximum
insulation.
The load line shall be removed from boom tip and stored on winch drum.
The Digger Derrick upper control station has metallic parts, which are necessary to
provide the structural support for the various components. These metallic parts
are interconnected. The main shaft that supports the platform and controls must
also support other load carrying options that can be added to the boom tip.
The fiberglass upper boom, in a well maintained condition, provides electrical
insulation between the boom tip and the truck as potential to ground. This
fiberglass will not protect the operator in the platform if any portion of the boom
tip, 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, a
grounded non-energized conductor. This type of contact can energize or ground
the controls because as stated before, all components of the boom tip are
interconnected. The fiberglass will not provide protection for the operator in phase
to phase contact or a phase to ground contact, nor will it protect the vehicle from
becoming energized if the steel boom section below fiberglass boom is brought
into contact with an energized conductor.
READ CAREFULLY
DEATH OR SERIOUS INJURY
WILL RESULT FROM SUCH CONTACT
OR INADEQUATE CLEARANCE
414590A
OCCUPANTS OF THE BASKETS OF THIS
AERIAL DEVICE HAVE ABSOLUTELY NO
ELECTRICAL PROTECTION FROM
CONTACT BY THE HUMAN BODY WITH
TWO ENERGIZED CONDUCTORS OR
BETWEEN AN ENERGIZED CONDUCTOR
AND A GROUNDED CONDUCTOR.
It makes no difference if this contact is
accidental or deliberate or whether contact is
made through metallic parts of the basket,
basket support, metal tools or equipment
brought into the basket. The insulating
components of this aerial device do not offer
protection in the event of such contact.
Proper conductor cover up, insulated sleeves
and gloves shall be worn when working near
energized lines or equipment.
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