Which of the following procedures is NOT compliant with NETA specifications for acceptance testing a circuit breaker?

The procedure of opening the case to inspect and clean contacts is not compliant with NETA specifications for acceptance testing of circuit breakers. NETA guidelines focus on specific electrical tests that verify the functionality and performance of the equipment rather than requiring physical inspections that involve opening the equipment case.

Acceptance testing, as outlined by NETA standards, primarily includes procedures and tests such as documenting test results, performing insulation resistance tests, and conducting operational tests to confirm the integrity and operational capability of the circuit breaker. These methods assess electrical properties and safety without dismantling the equipment, which could lead to potential issues such as compromising the equipment's integrity or introducing contaminants.

In contrast, while maintenance might include physical inspections for wear and contamination, this action is not part of the acceptance testing protocol, which emphasizes electrical performance verification instead.