Which information is required in the AHJ's enclosure testing report?

• A. Explanation of technical judgement; Test equipment calibration report; Test witness names; Make, model, and serial number of test equipment.
• B. Explanation of technical judgement; Test equipment calibration report
• C. Test witness names; Make, model, and serial number of test equipment
• D. Make, model, and serial number of test equipment

Answer: (B)

The essential idea is that the AHJ needs a defensible, traceable record of how the test decision was made and that the measurements came from accurate tools. The enclosure testing report must include an explanation of the technical judgement used to evaluate the enclosure against the applicable standards, showing the criteria, assumptions, and reasoning behind the pass/fail determination. It also must include the test equipment calibration report, to confirm that the instruments used were calibrated and within their valid period, ensuring the readings are trustworthy. This combination provides both the rationale for the conclusion and the evidence that the measurements were accurate. While names of witnesses or the make/model/serial numbers of equipment can appear in other documentation, they are not the information the AHJ requires to justify the test result; the critical pieces are the justification of the judgement and the calibration status.