Wire gauge for nmea 2000

[Kent Porter]

What gauge wire do I need to run power direct from battery to nmea power switch

[Edd]

Most cases you need no larger than the wire size you are connecting to.

[Ken Sauret]

Edd is exactly right. Although just in case you use that power for an additional use in the future and since you are pulling a new wire anyway, go up a couple sizes just in case. The larger the copper the better the source, hot or ground.