Section 1 - General Safety Practices
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1.3 OPERATION SAFETY
Electrical Hazards
• This machine is not insulated and does not provide protection from contact or
proximity to electrical current.
• Maintain distance from electrical lines, apparatus or any energized (exposed or
insulated) parts according to the Minimum Approach Distance (MAD).
• Maintain a clearance of at least 3 m (10 ft) 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 additional clearance is required for every
additional 30,000 volts or less.
• Allow for machine movement and electrical line swaying.
Voltage Range
(Phase to Phase)
MINIMUM APPROACH DISTANCE
(MAD)
0 to 50 KV 3 m (10 ft)
Over 50 KV to 200 KV 5 m (15 ft)
Over 200 KV to 350 KV 6 m (20 ft)
Over 350 KV to 500 KV 8 m (25 ft)
Over 500 KV to 750 KV 11 m (35 ft)
Over 750 KV to 1000 KV 14 m (45 ft)
Note: This requirement shall apply except where employer, local or
governmental regulations are more stringent.
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