Patents Assigned to I-T Safety Enterprises Limited
  • Ground fault protection for electrical power distribution systems
    Patent number: 4001804
    Abstract: Ground fault protection for an electrical installation is provided by isolating from neutral the service entry box and the raceways and conduits forming a ground return system connected to the box, and connecting a device between the box and neutral which responds to current leakage into the ground return system above a predetermined level by opening a switch in the entry box to interrupt the supply to the system.
    Type: Grant
    Filed: November 25, 1974
    Date of Patent: January 4, 1977
    Assignee: I-T Safety Enterprises Limited
    Inventor: Fred W. Irving