HV-L2.3

Isolation, proving dead, earthing and testing

HV-M2 · Safe systems of work · HV-M2-A Roles, permits, sanctions, switching programmes, isolation, earthing and testing.

Isolation is not complete until the conductors are **proved dead** and **earthed**. Testing, especially **insulation resistance** and **polarization index**, tells you whether the equipment is fit to go back into service.

Independent study. xplor is not an accredited training provider and awards no certificate or Certificate of Competency. The MCA High Voltage limitation can only be removed by completing an MCA-approved HV course (or, at operational level on revalidation, the qualifying HV sea service), and this material does not authorise anyone to switch, isolate or work on HV equipment. AI-drafted content pending subject-matter-expert review.