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 4-212 Establishing procedures

The employer responsible for the workers performing the tree work must prepare procedures that describe how the work is to be safely done. As required by section 8 of the OHS Regulation, the procedures must be in writing and available to workers at the work site affected by the procedures. Further, the procedures must by “acceptable”, a word defined in the ECUC to mean “acceptable to the owner/operator of the utility”.

These procedures must reflect, as applicable, the distance limits specified in Table 4-6 and Table 4-7 of the ECUC.

Table 4-6 Tree to Energized Electrical Equipment Or Lines Distances in Millimetres for Utility Tree Trimmers, Utility Tree Workers and Other Workers (See Rules 4-212, 4-214 & 4-226)

Voltage levels

Utility tree trimmers,
utility tree workers
and other workers

Nominal voltage to
ground
 
 
 
 
kV

Nominal voltage
phase to phase
 
 
 
 
kV

Maximum operating
voltage phase to
phase
 
 
 
kV

Tree to energized
electrical equipment
or lines distance for
slashing and
brushing
 
mm

Column 1

Column 2

Column 3

Column 4(1)

0.6 (DC only)

 

 

800

2.4

4.16

4.58

800

8.0

13.8

15.18

850

14.4

25

27.5

950

19.9

34.5

37.95

1050

 

69, 72

79.2

1350

 

138, 144

158.4

1650

 

230, 260

285

2150

 

500

550

3450

Note:
(1) Tree to energized electrical equipment or line distances in Column 4 have been calculated using IEEE tool distances plus 750 mm safety factor, rounded to the nearest 50 mm.

Table 4-7 Tree to Energized Electrical Equipment Or Lines Distances in Millimetres for Utility Tree Trimmers Using Rated Insulated Tools (See Rules 4-212, 4-214 & 4-228)

Voltage levels

Utility tree trimmers

Nominal voltage
to ground
 
 
 
 
 
kV

Nominal voltage
phase to phase
 
 
 
 
 
kV

Maximum
operating
voltage phase to
phase
 
 
 
kV

Tree to
energized
electrical
equipment or
lines distance
using rated
insulating tools
 
 
 
 
mm

Tree to
energized
electrical
equipment or
lines distance
using rated
insulating tools
from a rated
insulating aerial
device
 
mm

Column 1

Column 2

Column 3

Column 4(1)

Column 5(2)

0.6 (DC only)

 

 

350

not touching

2.4

4.16

4.58

350

not touching

8

13.8

15.18

400

not touching

14.4

25

27.5

500

not touching