Meters and troubleshootingQuestion 311 of 1506

You check a three-wire cabinet (A, B, C) for dead conductors. How many voltage checks are needed to test all phase pairs and each wire to ground in both AC and DC modes?

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Correct answer: 12

There are 6 point pairs (A-B, B-C, A-C, A-ground, B-ground, C-ground). Each is checked in two modes, so 12.

Source: Troubleshooting Motors and Controls (Dickson-Self), 1.3: Meter Usage

Questions last reviewed: 18 October 2026

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