ASTM International

Standard Test Methods and Specifications for Electrically Insulating Plastic Guard Equipment for Protection of Workers
 N F712

Annotation

These test methods cover three electrical tests on plastic guards and assembled guard systems. They are:

Method A—Withstand voltage proof test,

Method B—Flashover voltage, and

Method C—Leakage current.

This specification covers plastic guard equipment and guard systems used by workers for temporary insulation on electric power circuits.

Plastic guard equipment covered by this specification is rated for momentary, or brush contact only. Maximum-use voltages are covered in Table 1 and Table 2.

These test methods cover, but are not limited to, the following typical guards:

Conductor Guards and Connecting Covers as follows:

Line guards,

Line guard connectors,

Insulator covers,

Dead-end covers,

Bus guards, and

Bus “T” guards.

Structure and Apparatus Covers as follows:

Pole guards,

Ridge pin covers,

Switch blade covers,