Power connection ContentsSeaTalk NG power supplyYour product is supplied power via the SeaTalk NG backbone (or the NMEA 2000 backbone if applicable).Inline fuse requirementIf your product is NOT supplied with an inline fuse (whether separately or fitted to the power cable), you MUST fit a suitably-rated inline fuse to your product’s red power wire, housed in a waterproof fuse holder.Inline fuse and thermal breaker ratingsThe SeaTalk NG network’s power supply requires a suitably-rated inline fuse or thermal breaker to be fitted.12 Volt dc onlySeaTalk NG power cablesThe following SeaTalk NG power cables can be used to connect the backbone to your chosen 12 V dc power supply:SeaTalk NG power cable extensionIf you need to extend the length of the SeaTalk NG power cable, ensure you observe the following advice:SeaTalk NG product loadingThe number of products that can be connected to a SeaTalk NG backbone depends on the current draw of each product and the physical length of the backbone cabling.SeaTalk NG power connection pointThe point along the backbone where the power connection should be made is based on the length of the backbone.SeaTalk NG system loadingThe maximum loading (LEN) for a SeaTalk NG system depends on the length of the backbone.Power distribution — SeaTalk NGRecommendations and best practice.Positive ground systemsProduct groundingImportant safety information for connections to ground.Power connection via Autopilot Control Unit (ACU-Series)The SeaTalk NG backbone can be supplied 12 V dc power from a compatible Raymarine Autopilot Control Unit (ACU-Series).Previous topic: Cables and connections — General informationNext topic: Network connections