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ELECTRICAL HAZARDS
8 ► CR27 User Manual
Table 1. Minimum approach distances from energized conductors for qualied line-clearance arborists and
qualied line-clearance arborist trainees.
Nominal
Voltage
kV phase-to-phase
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
)
ft-in m ft-in m ft-in m
0.05–1.0 Avoid contact Avoid contact Avoid contact
1.1–15.0 2-04 0.71 2-08 0.81 2-10 0.86
15.1–36.0 2-09 0.84 3-02 0.97 3-05 1.04
36.1–46.0 3-00 0.92 3-05 1.04 3-09 1.14
46.1–72.5 3-09 1.14 4-03 1.30 4-07 1.40
72.6–121.0 4-06 1.37 5-02 1.58 5-07 1.70
138.0–145.0 5-02 1.58 5-11 1.80 6-05 1.96
161.0–169.0 6-00 1.83 6-10 2.08 7-05 2.26
230.0–242.0 7-11 2.41 9-00 2.75 9-09 2.97
345.0–362.0 13-02 4.02 15-00 4.58 16-03 4.96
500.0–550.0 19-00 5.80 21-09 6.63 23-06 7.17
765.0–800.0 27-04 8.34 31-03 9.53 33-10 10.32
1)
Exceeds phase-to-ground; elevation factor per 29 CFR 1910.269.
Table 2. Minimum approach distances to energized conductors for persons other than qualied line-clear-
ance arborists and qualied 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.