Guidance about working with high voltage (HV) electricity

What is high voltage (HV) electricity?

Electricity is classified as high voltage (HV) if it exceeds 1,000 Volt AC or 1,500 Volt DC. Equipment and conductors that carry high voltage have specific safety requirements and procedures.

In alternating current (AC), the flow of electric charge periodically reverses direction, whereas in direct current (DC), the flow of electric charge is in one direction.

HV submissions

Details of any proposed HV electrical installation on Western Australian mine sites must be provided to the department prior to installation. A design submission must be made for any significant change to HV installations, as well as the initial construction. This ensures an appropriate design and also notifies the regulator so an inspection can be arranged.

Refer to r. 5.18(2)(a) of the Mines Safety and Inspection Regulations 1995