© Infrastructure Health & Safety Association (IHSA)
28 • Institute for Work & Health (IWH)
Example 2 : A crane operates near 175,000 volt power lines. What is the
minimum distance that all objects must keep from the power lines?
Step 1: IDENTIFY the key words.
A crane operates near 175,000 volt power lines. What is the minimum
distance that all objects must keep from the power lines?
Step 2: SCAN the sections of the Regulations using the key words: 175,000
volts, minimum distance.
Step 3: LOCATE the Electrical Hazard section of the Regulations.
Locate the key words voltage and minimum distance in the table in
Subsection 188 (2).
Locate the key words more than 150,000 volts, but no more than
250,000 volts, and 4.5 metres in the minimum distance column.
Step 4: DECIDE that 4.5 metres is the minimum distance for all objects to
keep from 175,000 volt power lines.
TABLE
Column 1 Column 2
Nominal phase-to-phase
voltage rating
Minimum distance
750 or more volts, but no
more than 150,000 volts
3 metres
more than 150,000 volts,
but no more than 250,000
volts
4.5 metres
more than 250,000 volts 6 metres
188. (1) This section applies unless the conditions set out in
clauses 189 (a) and (b) are satisfied. O. Reg. 627/05, s. 7.
(2) No object shall be brought closer to an energized
overhead electrical conductor with a nominal phase-to-
phase voltage rating set out in Column 1 of the Table
to this subsection than the distance specified opposite to
it in Column 2.O. Reg. 627/05, s. 7.
