Blue Sea Systems Water-Resistant 100A BusBar, 300V AC, 48V DC, Tin-Plated Copper

Overview

The Blue Sea Systems Water-Resistant 100A BusBar is a covered common busbar for organizing 100A AC or DC distribution in wet or exposed areas of a boat. It gives installers a compact point for positive distribution, negative collection, or AC grounding circuits where splash, washdown, and bilge-area humidity make an uncovered busbar a poor fit.

The busbar is rated for 100A continuous service on AC or DC circuits, with maximum voltage ratings of 300V AC and 48V DC. It uses a tin-plated C11000 copper bus, one #10-32 terminal stud, and four #8-32 terminal screws, with wire capacity for one 8 AWG to 4 AWG input and four 16 AWG to 10 AWG load connections.

Key features

• 100A continuous rating for AC or DC circuits, with maximum ratings of 300V AC and 48V DC.
• Tin-plated C11000 copper bus helps maintain conductivity in marine electrical spaces where moisture and corrosion are constant concerns.
• Accepts one 8 AWG to 4 AWG input conductor and four 16 AWG to 10 AWG load conductors for small distribution groups.
• Water-resistant cover arrangement helps protect the connection points in lockers, consoles, engine spaces, and other exposed mounting areas.
• Includes three wire plugs to help maintain the water-resistant rating when fewer than four branch wires are installed.
• Nests with other Water-Resistant 100A Common BusBars and ST-Blade Water-Resistant Fuse Blocks for tighter electrical layouts.
• Mounting holes accept 1/4 inch or 6 mm screws, making it practical for panels, bulkheads, and equipment boards.
• Write-on circuit labels support cleaner service work and faster circuit identification later.

Variants

This busbar is offered in two cover configurations. Both are part of the same Water-Resistant 100A BusBar family and share the same core electrical role for covered marine power distribution.

The cover type is the main difference between the configurations. The manual-cover version adds wing screws for tool-free cover installation, which is useful where the cover may need to be removed during service or inspection.

• 2356, cover type: Standard. This configuration suits installations where a covered 100A busbar is needed and routine access to the cover is not the main concern.
• 2356100, cover type: Manual Cover. This configuration uses wing screws for tool-free cover handling, which can make service access simpler while keeping the covered layout.

Installation and setup

Install the busbar on a firm, dry mounting surface inside an electrical panel, console, locker, or equipment area where the conductors can enter cleanly without strain. The single-side nesting layout helps keep wire runs organized when several covered distribution components are mounted together.

Use correctly sized marine conductors, terminals, and circuit protection for the connected loads. The busbar is a distribution point, so upstream protection, cable sizing, and separation of positive, negative, and AC grounding circuits should match the vessel’s electrical plan.

Use cases on board

This busbar is a good match for boats that need a protected connection point for small distribution groups, electronics feeds, accessory circuits, negative returns, or AC grounding collection in areas where moisture exposure is expected. It is especially practical for compact rewires, console upgrades, and service boards where clean labeling and covered terminals make future troubleshooting easier.