MIL-HDBK-1025/10
4.4.2 Safety Equipment and Tools. When working around electrical lines and
equipment, temporary protective insulation is provided by using the insulating properties of
rubber goods, plastic guard equipment, and live-line tools. Platforms and aerial lift bucket trucks
provide insulated supports for positioning a worker.
4.4.2.1 Rubber Protective Equipment. Equipment consists of gloves, sleeves, blankets,
covers, and line hose. All items should meet or exceed requirements of the applicable ASTM F
18 series specification and be suitable for the working voltage level (Table 3). Rubber goods
should be visually inspected before use. An air test of gloves is also required. Workers should
periodically review ASTM F 1236, Guide for Visual Inspection of Protective Rubber Products.
Electrically retest rubber goods issued for service based on work practice and test experience
intervals. Retesting intervals should not exceed 6 months for rubber gloves and 12 months for
rubber sleeves and blankets. Retest any rubber goods where there may be a reason to suspect the
electrical integrity of the equipment. Electrically retest items that have been removed from
storage for issue for service, unless they were electrically tested at the time of placement into
storage and storage time does not exceed 12 months.
Table 3
ASTM F 18 Rubber Goods1
Minimum distance2
Maximum use,
Proof test
Class
Color label
ac volts
ac volts
millimeters (inches)
1,000
0
Red
5,000
25 (1)
7,500
1
White
10,000
25 (1)
17,000
2
Yellow
20,000
50 (2)
26,500
3
Green
30,000
75 (3)
36,000
4
Orange
40,000
4 (100)
1
Wear leather protectors over rubber gloves.
2
Minimum length of exposed rubber glove above the leather protector.
4.4.2.2 Plastic Guard Equipment. This equipment is rated for momentary (brush)
contact protection. Guards include those installed on conductors; connecting covers used over
lines, insulators, buses, and structures; and apparatus guards used over poles, crossarms, cutouts,
and switchblades. See Tables 33 and 34 in section 5. Electrically retest plastic guard equipment
based on work practice and test experience. Electrically retest items where there may be a reason
to suspect the electrical integrity of the equipment.
4.4.2.3 Live-Line Tools. Comply with the requirements of OSHA standard 29 CFR
1910.269(j), Live-Line Tools. ANSI/IEEE 935, Guide on Terminology for Tools and Equipment
14
Previous Page
