Summary
The protective conductor is a silent but critical part of the electrical system. If continuity does not exist, a fault may not clear as expected and exposed metallic parts can remain energized.
What is verified
It is verified that exposed conductive parts, panels, equipment and metal parts are connected to the protective conductor and grounding system as applicable.
The measurement must consider representative points and real continuity, not only the visual presence of cables.
Risks of poor continuity
A loose, cut, corroded or poorly connected conductor can prevent protections from operating during a fault.
It can also generate potential differences, electrical noise and dangerous conditions for people.
Where the problem appears
Modified panels, expansions, mobile equipment, metallic raceways, poor joints and informal repairs are frequent points.
Visual inspection must complement the measurement.
How to document it
The report must indicate tested points, method, results, photographs and observations.
If discontinuities are detected, corrections must be recommended before energizing or continuing operation.
Frequently asked questions
Are continuity and grounding the same?
No. Continuity verifies the protective conductor connection; grounding evaluates the system connected to earth.
When is it measured?
During initial verification, maintenance, diagnostics and regularization of installations.
Can it fail even if it looks connected?
Yes, due to loose joints, corrosion, cuts or poor splices.
Is it useful for people safety?
Yes, it is key for protections to operate during faults to exposed metal parts.
If you need technical support applied to this topic, review our initial verification RIC 19 service.