Operating Near Electrical Power Lines - Vanguard CPW 125-4-S Series Operation And Maintenance Manual

4.6 OPERATING NEAR ELECTRICAL POWER
Never operate the crane near electrical lines or in the danger zone area.
1. Do not place any part of the crane or load inside the Danger Zone.
EXCEPTIONS:
A. The Danger Zone may be entered after confirmation by an appointed person the electrical distribution and
transmission lines are de-energized and visibly grounded at the point work.
B. The Danger Zone may be entered if insulating barriers are erected to prevent physical contact with the lines.
These can't be a part of or attached to the crane.
2. For the minimum safe distance between electrical lines and any part of the crane or load (including handling
appendages), or while in the transit with the boom stowed, see Table 1. Safe Operating Distance.
Safe Operating Distance for Cranes Near Electrical Lines
Normal Voltage, kV – (phase to phase)
3. Exercise caution when working near overhead lines. They can move horizontally and vertically due to wind,
shifting the location of the Danger Zone.
4. Assign a qualified, signal person observe the clearance and warn the crane operator before approaching the Safe
Operating Distance limits.
a. Treat all overhead wires as energized until the person or utility owning the line verifies it is not energized.
LINES
Figure 3. Danger Zone
When operating near high voltage power lines
0 – 50
50 – 200
200 – 350
350 – 500
500 – 750
750 – 1000
When in transit with no load and boom stowed
0 – 0.75
0.75 – 50
50 – 345
345 – 750
750 – 1000
Table 1. Safe Operating Distance
Minimum required clearance
Ft.
10
15
20
25
35
45
4
6
10
16
20
14
(m)
(3.5)
(4.6)
(6.1)
(7.62)
(10.67)
(13.72)
(1.22)
(1.83)
(3.83)
(4.87)
(6.1)