Newmar RA-3 Cable FEED-THRU 0.39-0.47 Inch Cable Diameter

The Newmar RA-3 Cable FEED-THRU fitting is an essential marine electrical component designed for anyone running power, control, or signal cables through bulkheads, cabin walls, or sealed compartments on boats and RVs. After decades on the water, serious boaters know that moisture intrusion is the silent killer of onboard systems—corroded wiring looms, shorted batteries, and failed electronics often trace back to water entering cable penetrations.

This feed-through fitting solves that problem by creating a weathertight seal while allowing cables to pass safely through structural barriers without damage or compromise. Built to handle cables measuring 0.39 to 0.47 inches in diameter, the RA-3 accommodates standard marine-grade power cables, antenna leads, and instrumentation wiring found on cruising vessels and center consoles alike. The feed-through design uses compression or compression-gland sealing technology to create a tight, reliable barrier against saltwater spray, washdown, and condensation.

Marine-duty construction ensures the fitting resists corrosion from saltwater exposure and UV degradation, critical factors in maintaining electrical integrity over seasons of hard use. Boaters upgrading shore power systems, installing auxiliary battery banks, adding GPS/chartplotter networks, or retrofitting cabin lighting will find the Newmar RA-3 indispensable for any panel penetration requiring environmental protection.