Insulation resistance testing: unmasking the ‘silent guardians of electrical installations’In this article, Andrew Duffen, Technical Commercial Engineer at NAPIT, discusses insulation resistance testing, unmasking the silent guardians of electrical installations. Insulation resistance testing is an essential test for all inspectors to carry out. These tests are performed to determine that the cable and its insulation throughout the electrical installation, is not subject to damage ...The post Insulation resistance testing: unmasking the ‘silent guardians of electrical installations’ appeared first on Professional Electrician.