Why does an inspector open a receptacle cover plate only where it is safe and appropriate?

Behind a cover plate is an energised device with exposed terminals, and removing the plate puts the inspector's hands and tools near them. That is a live-parts hazard, and it is the reason plate removal is done selectively rather than routinely: where there is a specific reason to look, where the circuit's condition makes it reasonable, and where the inspector is equipped to do it safely. It is not prohibited by the standards, but neither is it a default step, and much of what would be learned — polarity, grounding, ground-fault protection — is obtainable from a receptacle tester without opening anything. Where a plate is removed the same discipline applies as at the panel: know what is energised, keep clear of terminals, and stop if conditions are worse than expected. Judgment about when to open is part of the competence being tested.

Behind the plate is an energised device with exposed terminals, so removal is a live-parts risk and is done selectively where there is reason and it can be done safely.

Removing receptacle cover plates exposes energised terminals. Inspection standards permit but do not require it. Most conditions of interest — polarity, grounding, GFCI function — are testable externally with a receptacle tester.

Live Behind the Plate. Open it only when there is a reason, and only when you can do it safely.

The same judgment governs the service panel dead front. Do not remove it where conditions are wet, damaged or otherwise unsafe, and report the limitation instead.

• •Treating plate removal as either required or forbidden
• •Opening plates routinely without a specific reason
• •Proceeding despite unsafe conditions instead of reporting the limitation