Snorkel TB120 2001 - Manual (Page 2)

P/N 0191914
D A N G E R
ELECTRICAL HAZARD
The TB120 is an all metal boom, NOT ELECTRICALLY INSULATED, aerial work platform. Do
not operate it near ELECTRICAL conductors. Regard all conductors as being energized. Use
the table and figure below to determine safe clearance from electrical conductors. Table 1 and
Figure 3 are reprinted courtesy of Scaffold Industry Association, ANSI/SIA A95, page 23.
Figure 3 - Minimum Safe Approach Distance (M.S.A.D.)
Table 1 - Minimum safe approach distance (M.S.A.D.)
to energized (exposed or insulated) power lines
Voltage range
(phase to phase)
Minimum safe approach distance
(Feet) (Meters)
0 to 300V Avoid contact
Over 300V to 50KV 10 3.05
Over 50KV to 200KV 15 4.60
Over 200KV to 350KV 20 6.10
Over 350KV to 500KV 25 7.62
Over 500KV to 750KV 35 10.67
Over 750KV to 1000KV 45 13.72
Danger: - Do not allow machine personnel or conductive
materials inside prohibited zone.
- Maintain M.S.A.D. from all energized lines and parts
as well as those shown.
- Assume all electrical parts and wires are energized
unless known otherwise.
Caution: - Diagrams shown are only for purposes of illustrating
M.S.A.D. work positions, not all work positions.