Ground fault and fire detector system

Claim 1

A ground fault and fire detector system for an A.C. electrical power distribution apparatus comprising: circuit interrupter means having at least one pole for disconnecting an electrical load power supply from at least one load; single-pole circuit means operatively connected to said interrupter means for controlling said interrupter means; said single-pole means being operable to disconnect a power supply from a load upon being activated by separate sources of electrical power being imposed thereon in response to detection of a ground fault or detection of fire, respectively; ground fault sensing means operatively positioned with respect to at least one wire for detecting a ground fault current; said sensing means being interposed between the single-pole circuit means and a ground fault electrical power supply of less than 120 volts to control the power from the ground fault electrical power supply to the single-pole circuit means; said sensing means including relay means responsive to detection of a ground fault current to electrically couple said ground fault power supply to the single-pole means for disconnecting said electrical load power supply from at least one load; and said single-pole circuit means being further coupled to a fire extinguish system to supply power from a fire system electrical power supply .[.of at least 120 volts A.C..]. to the single-pole circuit means for activating said interrupter means upon occurrence of a fire independently of said ground fault sensing means to disconnect said electrical load power supply from at least one load.