Blue Sea Systems CableCap Dual Entry PowerPost Cable Insulator, Up to 2/0 AWG, 0.7 in Cable Entry

Overview

The Blue Sea Systems Dual Entry CableCap is an insulating cover for PowerPost cable connections, used to help reduce the risk of accidental short circuits at exposed high-current terminals. It is made for marine electrical installations where battery, busbar, or distribution connections need a clean protective cap without making the connection point difficult to reach.

This dual-entry cap accepts cables up to 2/0 AWG or 70 mm², with a cable entry size of 0.7 in. (17.78 mm). The top lid gives access to the connection point, which is useful during installation, inspection, or service work in tight battery compartments, helm wiring spaces, and other DC power areas on board.

Key features

• Dual-entry PowerPost cable insulator for covering exposed terminal connections.
• Helps protect against accidental short circuits around high-current DC connection points.
• Top lid allows access to the connection point without removing the entire cap.
• Fits cable sizes up to 2/0 AWG or 70 mm².
• 0.7 in. (17.78 mm) cable entry size supports large marine battery and power distribution cables.
• Available in black and red for easier visual separation of negative and positive DC connections.

Variants

This CableCap is offered in two color configurations for matching common marine DC wiring layouts.

The color changes between variants, while the dual-entry layout, top lid access, cable size capacity up to 2/0 AWG or 70 mm², and 0.7 in. cable entry size remain the same across both listed versions.

• 4002, color black. The black cap suits negative DC connection points or installations where a low-profile visual appearance is preferred.
• 4003, color red. The red cap suits positive DC connection points and helps make protected live-side connections easier to identify during inspection or service.

Compatibility and fit

This insulator is intended for PowerPost-style cable terminations and other compatible terminal locations where the cable routing matches the dual-entry cap layout. Before installation, confirm the terminal style, available clearance, and cable diameter against the 0.7 in. entry size.

Installation and use on board

Install the cap so the cable exits are not forced or sharply bent, especially in battery compartments where large conductors can be stiff. The top lid is helpful when checking terminal tightness or inspecting the connection after service, while the covered body keeps the exposed connection better protected from dropped tools and nearby conductive parts.

This is a practical fit for boat owners and technicians organizing DC power connections in battery banks, distribution panels, busbar areas, and equipment spaces where large conductors are present and terminal protection matters.