Minimum Approach Distances (M.a.d.) - JLG 600S Operation And Safety Manual

SECTION 1 - SAFETY PRECAUTIONS
• Maintain distance from electrical lines, apparatus, or any ener-
gized (exposed or insulated) parts according 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)
0 to 50 KV
Over 50KV to 200 KV
Over 200 KV to 350 KV
Over 350 KV to 500 KV
Over 500 KV to 750 KV
Over 750 KV to 1000 KV
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 equip-
ment from any electrical line or apparatus carrying up to
50,000 volts. One foot additional clearance is required for
every additional 30,000 volts or less.
1-6
MINIMUM APPROACH DISTANCE
in Feet (Meters)
10 (3)
15 (5)
20 (6)
25 (8)
35 (11)
45 (14)
• 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 mini-
mum approach distance shall be reduced to a distance within
the designed working dimensions of the insulating barrier.
This determination shall be made by a qualified person in
accordance with the employer, local, or governmental require-
ments 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 OTH-
ERWISE.
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