Reliability Study of Cable, Terminations, and Splices by Electric Utilities in the Northwest

The results for cable, terminations, and splice reliability are summarized from a reliability report prepared annually by the Northwest Electric Light and Power Association (NELPA). Failure rates are given for primary cable, secondary cable, plug-in elbow connectors, primary splices and loadbreak junctions, pole top terminators, and secondary connections. Pertinent factors that affect the failure rates are identified.