OHS Code Explanation Guide

Published Date: July 01, 2009
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Part 40 Utility Workers – Electrical

Explanation of Rules Referenced from the ECUC, Second Edition

Rule 4-172 Distances

When performing live line work with live line tools, the qualified utility employee must still maintain the approach distance limits of Table 4-2 between the employee’s unprotected body parts and the energized electrical equipment or lines. This helps ensure that the work is performed safely.

Table 4-2 Limit of Approach Distances in Millimetres for Qualified Utility Employees (See Rules 4-136 & 4-148)

Voltage Levels

Qualified Utility
Employees

Nominal voltage to
ground
 
kV

Nominal voltage
phase
to phase
kV

Maximum operating
voltage phase to
phase
kV

Limit of approach
to exposed
energized
parts mm

Column 1

Column 2

Column 3

Column 4(1)

0.6 (DC only)

 

 

500

2.4

4.16

4.58

500

8.0

13.8

15.18

550

14.4

25

27.5

650

19.9

34.5

37.95

750

 

69, 72

79.2

1050

 

138, 144

158.4

1350

 

230, 260

285

1850

 

500

550

3150

Note:
(1) Limit of approach distances in Column 4 have been calculated using IEEE minimum tool distances plus 450 mm safety factor, rounded to the nearest 50 mm.