NEMA PB 2.2-1999 (R2004, R2009)
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Application Guide for Ground Fault Protective (GFP) Devices for Equipment
Contains instructions for the safe and proper application of GFP devices. GFPs include current-sensing devices, relaying equipment or combinations of current-sensing devices and relaying equipment or other equivalent protective equipment that will operate to cause a disconnecting means to open all ungrounded conductors at predetermined values of ground-fault current and time.
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