NMEA 2000 Backbone Cable 2M. Ancor's NMEA 2000 Approved Backbone Cables offer connection to an NMEA 2000 tee connector. The yellow couplers connect to the corresponding Ancor tees creating a simplified, color coded network installation. The backbone cables are available in four lengths from 0. 5 meter 1. 6 feet to 10 meters 32. 8 feet to cover a wide variety of applications. Features Color coded for easy installation and component identification. Large 18 AWG power conductors to reduce voltage drop and provide better reliability for critical backbone cables. NMEA 2000 Approved, 100 percent universal and compatible with other manufacturers' products. NMEA 2000 Backbone Cable 2M. Ancor's NMEA 2000 Approved Backbone Cables offer connection to an NME A 2000 tee connector. The yellow couplers connect to the corresponding Ancor tees creating a simplif ied, color coded network installation. The backbone cables are available in four lengths from 0. 5 m