SECTION 1 - SAFETY PRECAUTIONS
1-6
– JLG Lift –
3121773
• Maintain distance from electrical lines, apparatus, or
any energized (exposed or insulated) parts accord-
ing to the Minimum Approach Distance (MAD) as
shown in Table 1-1.
• Allow for machine movement and electrical line
swaying.
Table 1-1. Minimum Approach Distances (M.A.D.)
Voltage Range
(Phase to Phase)
MINIMUM APPROACH DISTANCE
in Feet (Meters)
0 to 50 KV
10 (3)
Over 50KV to 200 KV
15 (5)
Over 200 KV to 350 KV
20 (6)
Over 350 KV to 500 KV
25 (8)
Over 500 KV to 750 KV
35 (11)
Over 750 KV to 1000 KV
45 (14)
NOTE:
This requirement shall apply except where
employer, local or governmental regulations are
more stringent.
• Maintain a clearance of at least 10 ft. (3m) between
any part of the machine and its occupants, their
tools, and their equipment from any electrical line or
apparatus carrying up to 50,000 volts. One foot addi-
tional clearance is required for every additional
30,000 volts or less.
• The minimum approach distance may be reduced if
insulating barriers are installed to prevent contact,
and the barriers are rated for the voltage of the line
being guarded. These barriers shall not be part of (or
attached to) the machine. The minimum approach
distance shall be reduced to a distance within the
designed working dimensions of the insulating bar-
rier. This determination shall be made by a qualified
person in accordance with the employer, local, or
governmental requirements for work practices near
energized equipment
DO NOT MANEUVER MACHINE OR PERSONNEL INSIDE PROHIBITED ZONE
(MAD). ASSUME ALL ELECTRICAL PARTS AND WIRING ARE ENERGIZED
UNLESS KNOWN OTHERWISE.
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