Live-line working of non-ceramic insulators

The paper provides a review of the conditions that may be found on new and in-service non-ceramic insulators (NCIs) that will affect the decision on whether the NCI can be worked on using live-line work methods or not. Insulator conditions will also be identified that are deemed to be inconsequential to live-line working. Various diagnostic tools and guidelines are reviewed indicating their strengths and limitations. Various electrical test practices of NCIs are also reviewed as a means of ensuring safety in live-line working on or in the vicinity of NCIs.