Technician A claims that Metric wire is measured in cubic millimeters and larger numbers indicate larger wire. Technician B states that a higher AWG gauge size number indicates larger wire. Who is correct?

When discussing wire sizes, it's essential to understand the different measurement systems used. Metric wire is indeed measured in cross-sectional area measured in square millimeters rather than cubic millimeters, which pertains to volume rather than the area crucial for electrical wiring. Larger numbers in metric wire sizes correspond to smaller diameter wires, due to the nature of the metric sizing system.

On the other hand, the American Wire Gauge (AWG) system operates differently. In this system, a higher gauge number actually indicates a smaller wire diameter. Therefore, the statements made by both individuals contain inaccuracies regarding how wire sizes are assessed and what the implications of the measurements are.

Thus, neither technician's claim is correct—Metric wire doesn't measure in cubic millimeters, and a higher AWG gauge size number signifies smaller wire, not larger.