The in-service visual inspection, application, care, maintenance, and electrical and mechanical testing of insulating flexible slings, including core, insulating sheath, and attachments for use during live line work on voltages up to 1000 kV alternating current (AC) and ±800 kV direct current (DC) is provided in this guide. Testing pertains only to electrical and mechanical tests that may be performed periodically to check if there is any reduction in the electrical performance, mechanical performance, and both (combined) electrical and mechanical performance of the insulating flexible sling.

This guide provides recommendations for the in-service visual inspection, application, care, maintenance, and electrical and mechanical testing of insulating flexible slings, including core, insulating sheath, and attachments for use during live line work on voltages up to 1000 kV alternating current (AC) and ±800 kV direct current (DC). Testing pertains only to electrical and mechanical tests that may be performed periodically to check if there is any reduction in the electrical performance, mechanical performance, and both (combined) electrical and mechanical performance of the insulating flexible sling.

This guide provides details of present application methods and techniques for the inspection, care, maintenance, transportation, storage, and field testing of flexible sling. This guide also presents a new method of testing insulating flexible sling (IFS).