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User Manual
ELECTRICAL HAZARDS
The following guidelines must be followed to prevent
accidental contact with overhead electrical conductors
and/or communication wires and cables. (ref. ANSI
Z133.1-2000)
WORkING IN PROxIMITY TO
ELECTRICAL HAZARDS
determine whether an electrical hazard exists before
climbing, or otherwise entering, or performing work in
or on a tree.
clearance arborist trainees shall be assigned to work
-
ance arborist trainees shall be under the direct supervi-
-
ance arborist trainees shall be within vision or voice
communication during line-clearing operations aloft
when line-clearance arborists or line-clearance arborist
trainees must approach closer than 10 feet (3.05 me-
Nominal Voltage
Includes 1910.269
elevation factor,
sea level to 5000 ft
1
Includes 1910.269
elevation factor,
5001 – 10,000 ft
1
Includes 1910.269
elevation factor,
10,000 – 14,000 ft
1
m m m
0.05 to 1.0 Avoid contact Avoid contact Avoid contact
1.1 to 15.0 2–04 0.71 2–08 0.81 2–10 0.86
15.1 to 36.0 2-09 0.84 3–02 0.97 3–05 1.04
36.1 to 46.0 3–00 0.92 3–05 1.04 3–09 1.14
46.1 to 72.5 3–09 1.14 4–03 1.30 4–07 1.40
72.6 to 121.0 4–06 1.37 5–02 1.58 5–07 1.70
138.0 to 145.0 5–02 1.58 5–11 1.80 6–05 1.96
161.0 to 169.0 6-00 1.83 6–10 2.08 7–05 2.26
230.0 to 242.0 7–11 2.41 9–00 2.75 9–09 2.97
345.0 to 362.0 13–02 4.02 15–00 4.58 16–03 4.96
500.0 to 550.0 19–00 5.80 21–09 6.63 23–06 7.17
765.0 to 800.0 27–04 8.34 31–03 9.53 33–10 10.32
1. Exceeds phase-to-ground; elevation factor per 29 CFR 1910.269.
ters) to any energized electrical conductor in excess of
750 volts (primary conductor) or when:
1.
electrical conductors, so as to avoid contact.
2. Roping is required to remove branches or limbs
from such electrical conductors. This does not ap-
ply to individuals working on behalf of, or employed
by, electrical system owners/operators engaged in
line-clearing operations incidental to their normal
occupation.
arborist trainees shall maintain minimum approach dis-
tances from energized electrical conductors in accor-
dance with Table 1.
All other arborists shall maintain a minimum approach
distance from energized electrical conductors in accor-
dance with Table 2.
Branches hanging on an energized electrical conductor
shall be removed using non-conductive equipment.