Stanley Black & Decker PR41 manual Working in Proximity to Electrical Hazards

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

An inspection shall be made by a qualified arborist to determine whether an electrical hazard exists before climbing, or otherwise entering, or performing work in or on a tree.

Only qualified line-clearance arborists or qualified line- clearance arborist trainees shall be assigned to work where an electrical hazard exists. Qualified line-clear- ance arborist trainees shall be under the direct supervi- sion of qualified line-clearance arborist.

A second qualified line-clearance arborists or line-clear- 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-

ters) to any energized electrical conductor in excess of

750 volts (primary conductor) or when:

1.Branches or limbs being removed cannot first be cut (with a pole pruner/pole saw) to sufficiently clear 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.

Qualified line-clearance arborists and line-clearance 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.

Table 1 – Minimum approach distances from energized conductors for qualified line-clearance arborists and qualified line- clearance arborist trainees.

Nominal Voltage	Includes 1910.269		Includes 1910.269		Includes 1910.269
(kV phase-to-phase)	elevation factor,		elevation factor,		elevation factor,
	sea level to 5000 ft1		5001 – 10,000 ft1		10,000 – 14,000 ft1
	ft-in	m	ft-in	m	ft-in	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.

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