What is the cable resistance of a heavy cable?

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Enhance your knowledge of NMEA 2000 standards. Study with interactive questions, hints, and explanations, tailored to gear you up for the exam. Excel in marine electronics!

Multiple Choice

What is the cable resistance of a heavy cable?

Explanation:
Cable resistance per meter depends on how much copper is in the conductor. A heavier cable has a larger cross‑sectional area, so its resistance per meter is lower. For NMEA 2000 heavy trunk cables, the typical value is about 0.012 ohms per meter, which reflects the lower resistance needed to keep voltage drop and signal integrity acceptable over reasonable run lengths. The other numbers would imply lighter gauges (higher resistance) or an unusually heavy gauge not used for the standard heavy category, so they don’t match the common heavy cable specification. Thus, 0.012 ohms per meter is the correct figure.

Cable resistance per meter depends on how much copper is in the conductor. A heavier cable has a larger cross‑sectional area, so its resistance per meter is lower. For NMEA 2000 heavy trunk cables, the typical value is about 0.012 ohms per meter, which reflects the lower resistance needed to keep voltage drop and signal integrity acceptable over reasonable run lengths. The other numbers would imply lighter gauges (higher resistance) or an unusually heavy gauge not used for the standard heavy category, so they don’t match the common heavy cable specification. Thus, 0.012 ohms per meter is the correct figure.

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