NOCO GCP2 15A Waterproof AC Inlet — Dual 18" Cords, Flush-Mount 14 AWG for Boats & RVs

The NOCO GCP2 is a flush-mount, waterproof 15A AC inlet that provides two powered output cords from a single external port for vehicles, boats, and trailers.

Designed to simplify outdoor AC access, the GCP2 replaces the need for splitters, extra holes, or running cables through doors and hatches. Its low-profile, weather-sealed housing installs into a 2" flush hole and includes two integrated 18-inch cords that feed onboard devices directly. Built with heavy-duty 14 AWG wiring and full-size prongs, the inlet delivers full 15-amp, 125-volt power to two devices simultaneously while keeping contacts protected when not in use.

How does the NOCO GCP2 let me power two devices from one port?

The GCP2 contains two permanently attached 18" cords inside a single 15A inlet, so one external connection supplies both outputs without a separate splitter. That means you can run, for example, a battery charger and an engine block heater at the same time from the same shore power plug.

• Dual integrated 18-inch cords feed two devices without extra adapters.
• Full 15-amp capability maintained by heavy-duty 14 AWG copper wiring.
• No additional holes or external splitters required for dual output.

What makes this inlet suitable for outdoor marine or vehicle use?

The GCP2 is built to resist the elements with a pressure-fit rubberized cap and a rugged low-profile housing that blocks water, salt spray, and road grime when unused. Its durable construction and sealed design keep internal contacts dry and corrosion-free in harsh environments.

• Pressure-fit rubber cap forms a watertight seal when closed.
• Rugged housing withstands road, marine, and outdoor conditions.
• Accepts any standard Type-B three-prong extension cord for shore power.

How difficult is installation and what tools or wiring are needed?

Installation is plug-and-play: the flush-mount flange drops into a 2" hole and both integrated cords plug straight into the devices aboard. There’s no cable cutting, splicing, or hand-wiring required, so a basic mounting and fastening job is all that’s needed.

• Flush-mount flange fits a 2" cutout for a tidy installation.
• Integrated cords eliminate the need for wiring or connectors.
• Accepts standard three-prong cord from an external power source.

Will the GCP2 support full current without voltage drop?

Yes—the GCP2 uses full-size AC prongs and heavy-duty 14 AWG copper wiring to deliver the full 15-amp current to both outputs. That avoids the reduced amperage and heating common with thin-gauge pass-through plugs.

• 14 AWG copper conductors for reliable 15A performance.
• Full-size prongs reduce resistance and heat build-up.
• UL-approved assembly for safety and code compliance.

Who is this for: The NOCO GCP2 fits owners and technicians who want a safe, weatherproof, and simple way to power multiple onboard devices from a single external AC source. It’s ideal for car and truck bumpers, RVs, trailers, boats, golf carts, and industrial equipment where you want fast outside access, fewer cords through compartments, and reliable 15-amp service without custom wiring or extra holes.