voltage electrical systems / grounded phase protective device / ground fault relaying devices / ground wire device / low/mediumvoltage systems / electrical power systems / longwall systems / longwall mine power systems / wire device / power systems / low/medium voltage power systems / longwall electrical power systems / electrical systems / mine power systems / longwall mining systems / short circuit protective device / voltage power systems / /
Organization
Mine Safety and Health Administration / Congress / Approval and Certification Center / Certification Center / Harry Verakis U. S. Department of Labor Mine Safety and Health Administration Directorate of Technical Support Approval and Certification Center Triadelphia / /
Mine Safety and Health Administration (MSHA) - Ground Wire Monitor and Power System Acceptance Program Update - Wayne Colley and Harry Verakis