31
Operate Safely
Utilities – Overhead And Underground
DANGER! Electrocution or serious injury will result
from CONTACTING or APPROACHING power lines
or apparatus. Maintain Minimum Approach Distance.
(See chart.)
DANGER!
Death or serious injury will result from touching
or being near a machine that is in contact with or near an
energized electrical source.
Never approach power lines
with any part of the machine or load unless all local,
state/provincial and federal (OSHA) required safety
precautions have been taken.
Use extreme caution
because high voltage sources can arc without contact.
Check overhead clearances. If possible, have power to
the lines de-energized and visibly grounded. If not pos-
sible, request a signal person for guidance to maintain
at least the Minimum Approach Distance. (See chart.)
If the machine or load contacts an energized line, stay in
the machine and attempt to break contact. Warn others to
stay away from the machine. If machine catches fire and
you are forced to leave, jump clear of the machine with
both feet together and hop or shuffle away.
DO NOT
touch machine and ground at the same time.
REQUIRED CLEARANCE FOR OPERATION
NEAR HIGH VOLTAGE POWER LINES
Minimum
Approach
Normal Voltage, kV
Distance [Note (1)]
(Phase to Phase)
ft
(m)
to
50
10
(3.0)
Over 50 to 200
15
(4.6)
Over 200 to 350
20
(6.1)
Over 350 to 500
25
(7.6)
Over 500 to 750
35
(10.7)
Over 750 to 1,000
45
(13.7)
NOTE:
(1) Environmental conditions such as fog, smoke or
precipitation may require increased clearances.
Maintain
Minimum Approach
Distance
Stay Clear
Of Energized
Equipment
32
Operate Safely
Locate All Underground Utilities
Confirm that One-Call has been contacted. Confirm that
any utilities not subscribing to One-Call have been
contacted. Confirm that the site has been marked or
cleared. (See page 5,
One-Call First
.)
Obtain all information pertaining to the locate request,
including the One-Call confirmation code or ticket
number. If the facility owner has provided a locate
sketch, obtain a copy. Review any engineering drawings
provided by utilities. This information should be retained.
Personally verify One-Call utility marks. There are
variations from state to state.
Take a copy of the locate sketch to the job site. Confirm
all of the locates. Review the site for signs of unmarked
utilities. These signs may include pedestals, pole risers,
meters, trench lines, manhole covers, sewer drain
outlets, etc. Review not only the immediate area, but
also the perimeter of the area for utility markers.
Additionally, the area should be swept by an
experienced operator using a device to locate utilities
and large metal objects.
Any inconsistencies with line locations or any inaccurate
locates must be resolved.
When excavating near underground services, expose
the service by hand-digging or by using soft excavation,
such as vacuum excavation, if permitted by local utilities.
When gas lines are present on the site, do not smoke or
do anything to cause a spark in the vicinity of a gas line.
Make plans to restrict working area access—with cones
and tape, barriers, warning signs, fences, etc.—until the
job is complete.
Make certain that you are in compliance with all local,
state/provincial, national and other requirements and
regulations, including those regarding open excavations,
or “potholes.”
Locate All
Utilities, Maintain
A Safe Distance
Summary of Contents for 2503
Page 12: ...I 10 OM 25 3503 us Edition 4 1 Ba2503_3503us4_0SIX fm Index...
Page 40: ...1 28 OM 25 3503 us Edition 4 1 2503_3503b110 fm Introduction...
Page 182: ...4 8 OM 25 3503 us Edition 4 1 2503_3503b410 fm Malfunctions...
Page 230: ...5 48 OM 25 3503 us Edition 4 1 2503_3503b550 fm Wartung...
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