Covers ground-fault current sensing devices, relaying equipment, or combinations of ground-fault current sensing devices and relaying equipment or equivalent protection equipment for use in ordinary locations that will operate to cause a disconnecting device to open all ungrounded conductors at predetermined values of ground-fault current, in accordance with American National Standard National Electrical Code, ANSI/NFPA 70-1999. The proposal that is being circulated at this time is a clarification and reorganization of requirements in UL 1053.