9
ELECTRICAL HAZARDS CONTINUED
Table 2 - Minimum approach distances to energized conductors for persons other than qualifi ed
line-clearance arborists and qualifi ed line- clearance arborist trainees.
Nominal Voltage
kV phase-to-phase
1)
Distance
ft-in m
0.0 - 1.0 10-00 3.05
1.1 - 15.0 10-00 3.05
15.1 - 36.0 10-00 3.05
36.1 - 50.0 10-00 3.05
50.1 - 72.5 10-09 3.28
72.6 - 121.0 12-04 3.76
138.0 - 145.0 13-02 4.00
161.0 - 169.0 14-00 4.24
230.0 - 242.0 16-05 4.97
345.0 - 362.0 20-05 6.17
500.0 - 550.0 26-08 8.05
785.0 - 800.0 35-00 10.55
1)
Exceeds phase-to-ground.
The tie-in position should be above the work area and located in such a way that a slip would swing the arborist away
from any energized electrical conductors or other identifi ed hazard.
While climbing, the arborist should climb on the side of the tree that is away from energized electrical conductors as re-
quired in Tables 1 and 2.
Footwear, including lineman’s overshoes, having electrical-resistant soles, shall not be considered as providing any mea-
sure of safety from electrical hazards.
Rubber gloves, with or without leather or other protective covering, shall not be considered as providing any measure of
safety from electrical hazards.
Ladders, platforms and aerial devices, including insulated aerial devices, shall be subject to minimum approach distances
in Table 1 and 2.
Aerial devices and attached equipment (such as chippers) contacting energized electrical conductors shall be considered
energized. Contact shall be avoided, except where emergency rescue procedures are being carried out. Emergency res-
cue should be performed in accordance with 4.3.
Storm Work and Emergency Conditions-Line Clearance
Line clearance shall not be performed during adverse weather conditions such as thunderstorms, high winds and snow
and ice stroms.
Qualifi ed line-clearance arborists and qualifi ed line-clearance arborists trainees performing line clearance in the aftermath
of a storm or under similar conditions shall be trained in the special hazards associated with this type of work.
Line-clearance operations shall be suspended when storm work or emergency conditions develop involving energized
electrical conductors. Electrical system owners/operators shall be notifi ed immediately.
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