What is the cable resistance of a mid 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 mid cable?

Explanation:
On a NMEA 2000 bus, different cable sections have assigned resistance per meter to keep voltage drop and signal integrity within limits. The mid cable, a spur that sits between trunk sections, is specified to have about 0.015 ohms per meter. This value reflects the typical conductor size used in mid-span cables and balances practical wiring with keeping the bus voltage drop and CAN signaling reliable over typical lengths. Values that are much lower or higher wouldn’t align with the standard wiring used in practice, and the slightly different figure you’d see for other sections (like end-of-trunk) isn’t the same as the mid-cable spec.

On a NMEA 2000 bus, different cable sections have assigned resistance per meter to keep voltage drop and signal integrity within limits. The mid cable, a spur that sits between trunk sections, is specified to have about 0.015 ohms per meter. This value reflects the typical conductor size used in mid-span cables and balances practical wiring with keeping the bus voltage drop and CAN signaling reliable over typical lengths. Values that are much lower or higher wouldn’t align with the standard wiring used in practice, and the slightly different figure you’d see for other sections (like end-of-trunk) isn’t the same as the mid-cable spec.

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