Alert #C4/1293
                                                       ISSN 1195-5228

                                   ALERT

            WORK IN PROXIMITY TO LIVE ELECTRICAL INSTALLATIONS

Without appropriate precautions and procedures, work carried out in 
proximity to electrical transmission or outdoor distribution lines may 
endanger workers.

Recently this was demonstrated in the death by electrocution of two 
workers who rolled a scaffold mounted on wheels into a live overhead 
electrical line rated at 4,800 volts.

A major cause of accidents of this type is failure to identify the extreme 
hazards associated with live electrical installations.

Employers and supervisors have a responsibility to identify any hazard 
that is likely to endanger a worker. They must also ensure that the 
worker, while working in proximity to electrical transmission or outdoor 
distribution lines, maintains the minimum distances set out in the table 
under section 186 of the Regulations for Construction Projects.

The minimum distances apply to all objects, including scaffolds, hand 
tools, ladders, heavy equipment, etc.

Where the voltage is unknown, contact Ontario Hydro or the local power 
utility. If in doubt, assume it is 750 volts or greater.

Section 181 through 195 of the Regulations for Construction Projects set 
out the provisions applying to construction work in proximity to live 
electrical installations.
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Produced by the Construction Health and Safety Program, Occupational 
Health and Safety Branch, Ontario Ministry of Labour. Disponible en 
fran¨ais.