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Overhead Assistance

In March of 2016, MIOSHA amended STD-1307. This affected Part 10 for cranes and derricks and Part 15 for excavators, hoists, helicopters, and conveyors. The minimum clearance distance from overhead lines has changed.

If you cannot maintain a minimum clearance distance from any overhead electric lines with the equipment you will be using on the job, please contact the electric company listed on your ticket.

MISS DIG 811 will notify any member facility owners who participate in the program of the request for an overhead assistance appointment between the excavators with the electric company. Please be aware that appointments must be scheduled during the work week between 9 AM and 3 PM.

Please refer to the tables below to see what the minimum clearance distance is. You may also refer to the MIOSHA Fact Sheet: Electrical Safety: Powerline Clearances. As well as the Contractor’s Directory to Overhead Power Line Safety Information.

Table A - MINIMUM CLEARANCE DISTANCES

Voltage
(nominal, kV, alternating current)
Minimum clearance distance (feet)
up to 50 10
over 50 to 200 15
over 200 to 350 20
over 350 to 500 25
over 500 to 750 35
over 750 to 1,000 45
over 1,000 (as established by the utility owner or operator or registered professional engineer who is a qualified person with respect to electrical power transmission and distribution)
Note: The value that follows "to" is up to and includes that value.
For example, over 50 to 200 means up to and including 200kV

Table B - MINIMUM CLEARANCE DISTANCES WHILE TRAVELING WITH NO LOAD

Voltage
(nominal, kV, alternating current)
Minimum clearance distance (feet) while traveling
up to 0.75 4
over .07 to 50 6
over 50 to 345 10
over 345 to 750 16
over 750 to 1,000 20
over 1,000 (as established by the utility owner or operator or registered professional engineer who is a qualified person with respect to electrical power transission and distribution)