Section 2. Operating Equipment Near Energized Equipment.
2.1. Operation of Equipment Near High-voltage Facilities.
Except for power O&M employees operating equipment in strict accordance with this
FIST, no employee shall set up or operate any piece of mechanized equipment
where it is possible to bring such equipment or any part thereof within the minimum
clearance distance specified in the following table of any high-voltage (600 volts and
above) line or installation unless at least one of the following safety precautions has
been taken:
FIST, no employee shall set up or operate any piece of mechanized equipment
where it is possible to bring such equipment or any part thereof within the minimum
clearance distance specified in the following table of any high-voltage (600 volts and
above) line or installation unless at least one of the following safety precautions has
been taken:
a. The utility company or owner of the line has been notified, the line deenergized and
grounded, and positive control measures taken to prevent energization of the line
during the progress of the work.
grounded, and positive control measures taken to prevent energization of the line
during the progress of the work.
b. Adequate guards have been installed, or barriers erected, to prevent the
equipment or any part thereof from coming within the specified minimum clearance
distance of an energized conductor or part.
equipment or any part thereof from coming within the specified minimum clearance
distance of an energized conductor or part.
c. A full-time signalman, aided by an automatic warning device installed on the
equipment and/or an insulated measuring device, is utilized to warn the operator
when the equipment approaches the specified minimum distance.
equipment and/or an insulated measuring device, is utilized to warn the operator
when the equipment approaches the specified minimum distance.
Nominal phase-to-phase
Minimum Distance
voltage
Kilovolts
Feet M
50 and below
10 3.0
(minimum for any energized conductor)
69
11
3.2
115
12
3.7
138
13
3.9
161
14
4.2
230
16
4.9
345
20
6.0
500
25
7.6
Use 10 feet (3 meters) plus 0.4 inch (0.01) meter for each 1 kV over 50kY for other
voltages.
voltages.
NOTE: A NOTICE OF THE MINIMUM CLEARANCE (sic, should have been
DISTANCE) REQUIREMENTS SHALL BE POSTED IN THE OPERATOR'S CAB OF
DISTANCE) REQUIREMENTS SHALL BE POSTED IN THE OPERATOR'S CAB OF
3 (FIST 3 - 29 5/90)