MIL-HDBK-1025/10
Energized Electrical Line Work
5.4
WARNING
Energized line maintenance should have been approved by the
Public Works Officer or other designated authority (per local
designation) and considered necessary to support a critical
mission, prevent human injury, or protect property. Observe
approved work methods, equipment prework procedures, and
general job-in-progress procedures. No work may be performed
during adverse weather conditions (ice storms, high winds,
electric storms) unless there is an emergency and the work has
been approved. See Tables 13, 14, and 15 for number of qualified
workers.
Permitted Electrical Line Work Methods
5.4.1
WARNING
Only the approved methods given in Table 30 can be used by
facility line workers in performing electrical line maintenance.
Table 30
Categories of Electrical Line Maintenance Work
Line potential1
Worker insulation
Worker protective methods
Approved for use
Ground
None
De-energize, isolate,
Always
lockout/tagout/tryout, and
ground2
Intermediate
Isolated from
Use insulated aerial lifts/supports Requires specific
grounded objects by
and insulated tools on energized approval
insulating means
lines
Line
Insulated from ground Bonded to energized line for
Prohibited
barehand work
1
Refer to ANSI/IEEE 516, IEEE Guide for Maintenance Methods on Energized Pole-Lines for
definitions.
2
When lines are not grounded they are considered energized.
Voltage Levels and Approved Work Methods and Equipment
5.4.2
WARNING
Use the approved energized work methods given in Table 31
while maintaining the working distance requirements given in
Table 11.
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