ASTM F712 2006 Edition, November 15, 2006
Standard Test Methods and Specifications for Electrically Insulating Plastic Guard Equipment for Protection of Workers
Includes all amendments and changes through Reapproval Notice , 2011
Published By:ASTM International (ASTM)
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 guard connectors,
Bus guards, and
Bus “T” guards.
Structure and Apparatus Covers as follows:
Ridge pin covers,
Switch blade covers,
Structural barriers, and
Cross arm guard.
It is common practice for the user of this equipment to prepare instructions for the correct use and maintenance.
The use and maintenance of this equipment is beyond the scope of these test methods.
This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.