【国外标准】 Standard Specification for Electrically Insulating Plastic Guard Equipment for Protection of Workers (Withdrawn 2008)

This specification covers electrically insulating plastic guard equipment and guard systems for temporary insulation on electric power circuits. Typical plastic guard equipments include, but are not limited to, line guards, line guard connectors, insulator covers, dead end covers, bus guards, bus “T” guards, pole guards, ridge pin covers, switch-blade covers, arm guards, cutout covers, and cross arm guard. Materials for guards shall conform to the specified impact strength, water absorption, dielectric strength, flame retardancy, dimensions, workmanship, finish, appearance, marking, and packaging.1.1 This specification covers plastic guard equipment and guard systems used by workers for temporary insulation on electric power circuits.1.2 Plastic guard equipment covered by this specification is rated for momentary, or brush contact only. Maximum-use voltages are covered in Annex A1.1.3 Typical guards covered include, but are not limited to, the following:1.3.1 Conductor guards and connecting covers as follows:1.3.1.1 Line guards,1.3.1.2 Line guard connectors,1.3.1.3 Insulator covers,1.3.1.4 Dead end covers,1.3.1.5 Bus guards, and1.3.1.6 Bus "T" guards.1.3.2 Structure and apparatus covers as follows:1.3.2.1 Pole guards,1.3.2.2 Ridge pin covers,1.3.2.3 Switch-blade covers,1.3.2.4 Arm guards,1.3.2.5 Cutout covers, and1.3.2.6 Cross arm guard.1.4 The values stated in inch-pound units are to be regarded as the standard.