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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.
1-6
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.
MINIMUM APPROACH DISTANCE
in Feet (Meters)
10 (3)
15 (5)
20 (6)
25 (8)
35 (11)
45 (14)
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