OHS Code Explanation Guide

Published Date: July 01, 2009
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Part 33 Explosives Safety

Section 501 Overhead power line

In an electric blasting system, electromagnetic radiation may introduce sufficient electric current to prematurely initiate detonation devices. The 60 metre distance is intended to limit this possibility.

Use of the term “overhead power line” makes this requirement very specific, eliminating the possibility of cable TV and telephone lines incorrectly restricting blasting operations.