UFC 3-560-01
6 December 2006
Including change 1, 7 December 2006
Table 8-3. Insulating Overhead Line Plastic Guards/Platforms for Electrical
Workers
Standards
ASTM F 712, Test Methods for Electrically Insulating Plastic Guard Equipment for Protection
of Workers
ASTM F 968, Specification for Electrically Insulating Plastic Guard Equipment for Protection
of Workers
ASTM F 1564, Specification for Structure Mounted Insulating Work Platforms for Electrical
Workers
Common Classifications for Plastic Guards
Installation
Conductors
Structure/Apparatus
Special
Attached hot stick
Line guards
Pole guards
Shape
Eye for
Line guard
Ridge pin covers
Size
removable hot
connectors
Attachment
Switchblade covers
stick
Insulator covers
Arm guards
More stringent
Rope loop or
Deadend covers
electrical
Cutout covers
equivalent for
requirements
Bus guards
Crossarm guards
gloving or hot
Bus "T" guards
stick
Guard Rating for Accidental Brush Contact
Maximum Use Rating Proof Test Withstand Voltage
kV (60 Hz)
(In-Service Testing)
Phase-to-Ground
Phase-to-
Phase-to
Duration,
Class
Criteria
kV
Phase1
Ground
Minutes
60 Hz
dc
2
14.6
8.4
13.0
18
1
No flashover other
than momentary as a
3
26.4
15.3
24.0
34
1
result of too close
4
36.6
21.1
32.0
45
1
spacing of electrode
5
48.3
27.0
42.0
60
0.5
6
72.5
41.8
64.0
91
0.25
Notes for Table 8-3:
1. Cover-up materials are tested at values greater than the maximum use phase-to-
ground values. The maximum use phase-to-phase values relate to guarded-phase-
to-guarded-phase. The units are not rated for bare-phase-to-guarded-phase
potentials.
8-6
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