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 4-140 Rubber glove work

Limit of approach distances can be reduced when a worker performing live line work does so from a rated insulated device using rubber gloves. The applicable approach distances are shown in Table 4-3 of the ECUC.

Table 4-3 Limit of Approach Distances in Millimetres for Qualified Utility Employees Performing Live Line Work Using Rubber Gloves (See Rule 4-140)

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 for work
performed from a rated insulated
device

Unprotected
body parts to
exposed work
 
 
 
 
 
Mm

Unprotected
body parts to
exposed
adjacent
phases,
structure
surfaces or
ground parts
Mm

Column 1

Column 2

Column 3

Column 4(1)

Column 5(2)

2.4

4.16

4.58

40(3)

500

8

13.8

15.18

120

550

14.4

25

27.5

210

650

19.9

34.5

37.95

290

750

 

69, 72

79.2

(4)

(4)

 

138, 144

158.4

(4)

(4)

 

230, 260

285

(4)

(4)

 

500

550

(4)

(4)

Note:
(1) Limit of approach distances in Column 4 have been calculated using IEEE minimum tool distances rounded to the nearest 10 mm.
(2) Limit of approach distances in Column 5 have been calculated using IEEE minimum tool distances plus 450 mm safety factor, rounded to the nearest 50 mm.
(3) Work performed directly from a pole or structure on electrical equipment or lines operating at voltages below 5 kV between conductors must be done in accordance with Rule 4-142.
(4) Live line work using rubber gloves is not normally done at these voltage levels. Rubber insulating equipment may be required to handle isolated and grounded lines that normally operate at these voltage levels.