Mini Powertap. A powertap is connected to a network backbone just like any Tee but rather than connecting a device their purpose is to provide "bus" power. Typically a Powertap is placed as central as possible between total devices on backbone. Maretron Powertap uniquely provides two power inputs permitting doubled power provision for devices.. Connects power supply to NMEA 2000 Trunk Line in convenient plug/play fashion. Replaceable fuses to protect bus and connected components from excessive current. Provides LED status indication of power and correct polarity connection for simple diagnostics.