ASTM F712工人防护用电绝缘塑料防护设备的标准试验方法和规范
日期:2012-02-08 11:15
the phase to phase voltage on which it may be used and the class or proof voltage at which it is tested. Plastic guard equipment, however, is designed to provide a satisfactory safety factor only when used in a phase-to-ground exposure. If exposure is phase-to-phase, then a satisfactory safety factor is only provided if the exposure is covered-phase-to-covered-phase.
Work practices vary from user to user, dependent upon many factors. These may include, but are not limited to, operating system v
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