Overview

The Blue Sea Systems 3125 is a PG16 SMS enclosure gland for #14 to #10 cable with up to three conductors. It is used to bring cable into a Blue Sea SMS Surface Mount System enclosure without leaving an open entry point at the box. On a boat, that matters when panel wiring runs through lockers, utility spaces, or other tight areas where clean cable routing makes future service easier.

This part matches the SMS enclosure platform rather than a general cable pass-through. It works with the 3113 SMS Surface Mount System Panel Enclosure and comes with 3116, 3117, 3118, 3119, and 3120 enclosures. When you are checking fit, the key details are the PG16 gland size and the cable range of #14 to #10 for a 3-conductor cable.

Key features

• PG16 SMS enclosure gland for #14 to #10 cable with up to three conductors
• Made for Blue Sea Systems SMS Surface Mount System enclosures
• Direct fit for model 3113 and matched to the 3116 through 3120 enclosure family
• Useful for replacement work or for adding a cable entry to a blank SMS enclosure
• Simple fit check based on enclosure model, PG16 gland size, and cable range

Compatibility and fit

This is a good match for installers and boat owners working with Blue Sea SMS enclosures for panel and enclosure wiring. It makes the most sense when a 3-conductor cable needs to enter the enclosure and the cable falls within the stated #14 to #10 range.

If your setup uses a different enclosure family or a different cable size, the fit should be checked before ordering. With this part, enclosure compatibility and cable size matter more than the generic product category.

Installation and setup

On refit jobs, this part usually comes into play when replacing a missing or damaged gland, restoring an older SMS enclosure, or finishing a 3113 blank enclosure with the correct cable entry hardware. It keeps the enclosure layout consistent with the rest of the SMS system, which is helpful when access is limited once the panel is mounted.