DISTRIBUTION SAFETY EQUIPMENT
As the project supervisor or crew leader. you must
review the work plan with all linemen before the start
of the project. This conference lets all crew members
know what their responsibilities are and what
protective equipment and correct tools will be needed
to safely and efficiently complete the assignment.
Some of the most common pieces of safety equipment
that you may use to ensure that your project is
completed without incident are described below.
The most important article of protection for a
lineman or a cableman is a good pair of rubber gloves
with the proper dielectric strength for the voltage of the
circuit to be worked on. Leather protector gloves
always must be worn over the rubber gloves to prevent
physical damage to the rubber while work is being
performed. When the rubber gloves are not in use, they
should be stored in a canvas bag to protect them from
mechanical damage or deterioration from sunrays.
Rubber gloves always should be given an air test by the
lineman or cableman each day before the work is
started or whenever the workman encounters an object
that may have damaged the rubber gloves.
The American National Standards Institute
standard ANSI/ASTM D120, Rubber Insulating
Gloves, covers linemans rubber glove specifications.
The proof-test voltage of the rubber gloves should
not be construed to mean the safe voltage on which the
gloves can be used.
The maximum voltage on which gloves safely can
be used depends on many factors including the care
exercised in their use; the care followed in handling,
storing, and inspecting the gloves in the field; the
routine established for periodic laboratory inspection
and test: the quality and thickness of the rubber; the
design of the gloves: and other factors such as age,
usage. and weather conditions.
Inasmuch as gloves are used for personal
protection and a serious personal injury may result if
they fail while in use. an adequate factor of safety
should be provided between the maximum voltage on
which they are permitted to be used and the voltage at
which they are tested.
Rubber insulating gloves should be thoroughly
cleaned. inspected. and tested regularly by competent
While a lineman is working on high-voltage
distribution circuits. rubber sleeves should be worn
with rubber gloves to protect the arms and shoulders of
the lineman. Rubber insulating sleeves must be treated
with care and inspected regularly, by the linemen in a
manner similar to that described for rubber insulating
The rubber insulating sleeves should be
thoroughly cleaned. inspected. and tested regularly by
Rubber Insulating Line Hose
Primary distribution conductors can be covered
with rubber insulating line hose to protect the lineman
from an accidental electrical contact (fig. 4-50). The
line hoses are manufactured in various lengths with
inside-diameter measurements that vary from 1 to 1
l/2 inches and must be tested to meet the required line
voltage. The lineman should be sure that the voltage
rating ofthe line hose provides an ample safety factor
for the voltage applied to the conductors to be
All line hoses should be cleaned and inspected
regularly. A hand crank wringer can be used to spread
the line hose to clean and inspect it for cuts or corona
The rubber insulating line hose should be tested for
voltage according to the specifications at scheduled
In-service care of insulating line hose and covers
is specified in ANSI/ASTM D1050 standard.
Figure 4-50.Rubber insulating line hose used to cover