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 4-180 Rubber gloves

Paragraph (a) refers to Division C of the ECUC, which contains only a single rule, rule 4-148. However, subsection 800(2) of the OHS Code indicates that rule 4-148 does not apply. This is because the standards listed in rule 4-148 have been replaced and moved to section 799 of the OHS Code.

Insofar as they describe the safe use of rated insulated devices, the listed standards must be used. Otherwise, the manufacturer’s specifications for the rated insulated devices must be followed as required by section 12 of the OHS Code.

Paragraph (b) requires that the limit of approach distances specified in Table 4-3 be followed when live line work using rubber insulating gloves is performed.

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.

Paragraph (c) requires the qualified utility employee performing this work to work from a rated insulated device e.g. rated aerial device, rated work platform (“insulated diving board”), etc. Readers are referred to rule 4-182 for an exception.