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Outdoor Light Mounting Box with Hidden Cable Channel (False Back Design)

A sleek 3D-printed fix for messy outdoor wiring.
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updated November 8, 2025

Description

PDF

This custom junction box was designed to improve the look of outdoor wall lights that require bottom cable entry.

This light fixture from Biltema (Artnr. 46-3504 and 46-3505) come with a flat mounting base, acting as a junction box and mount. When the power cable must enter from below (as required outdoors), the result is usually an ugly visible conduit or loop of cable on the wall.

This model solves that problem by adding a false back with a hidden cable channel behind the box. The incoming cable makes a neat U-turn behind the mounting plate, completely concealed from view once the fixture is mounted.

  • Designed for outdoor use (includes drainage hole)
  • Provides clean cable routing without visible conduits
  • Can be printed in PETG or ASA for weather resistance

Model origin

The author marked this model as their own original creation.

License