Intermatic PJB4175 Junction Box — 4-Light Black Polymer Pool & Spa Box, Watertight, Platform Layout

The Intermatic PJB4175 is a watertight, polymer junction box designed to securely connect up to four pool or spa lights and multiple conduit sizes.

This compact, black junction box combines a platform-style layout with a user-friendly lid and accessible ground bar to simplify electrical connections for pools, spas, and landscape lighting. Built from durable polymer, the PJB4175 resists moisture and provides a tidy, code-friendly enclosure for flexible cords and non-metallic conduit runs. It supports a variety of wire gauges and conduit diameters, making it a practical choice for retrofit or new installations where reliable outdoor electrical connections are required.

How many lights and cable types can this box support?

The PJB4175 accepts up to four fixtures and accommodates a mix of flexible cords and non-metallic conduit sizes. It was designed to accept #16-3, #12-3 and #10-3 flexible cords in any combination, plus non-metallic conduit from 1/2" to 1". This flexibility lets you route multiple light runs and a separate supply feed without needing separate enclosures.

• Capacity: up to four pool or spa lights
• Flexible cord compatibility: #16-3 through #10-3
• Conduit compatibility: 1/2" to 1" non-metallic conduits
• Allows one conduit for supply conductor feed

What features make installation faster and safer?

The box uses a platform layout and only two screws to secure the lid, reducing assembly time and improving access during wiring and maintenance. An exposed, easy-access ground bar streamlines grounding connections, and the polymer construction provides corrosion and moisture resistance in wet environments. The overall design helps installers maintain neat, code-aware terminations with minimal effort.

• Platform design for organized internal wiring
• Lid attaches with only two screws for quick access
• Easy-access ground bar simplifies grounding
• Polymeric housing resists corrosion and moisture

Can this junction box be mounted to a wall or post?

The PJB4175 is compatible with wall or post mounting via an optional bracket (model PA114), so you can position it where conduit runs are most convenient. Without the bracket it still mounts securely in many standard locations; using the PA114 bracket gives a neat, elevated installation for pool equipment pads, pool cages, or landscape posts. Check local codes and mounting methods to ensure compliance with safety and clearance requirements.

• Optional PA114 wall/post mounting bracket available
• Mounting options support neat, accessible installations
• Bracket raises box for easier conduit entry and inspection

What size and durability can you expect from the enclosure?

Constructed from robust polymer, the junction box is sized to hold four light connections while still offering room for proper wire management. The material choice reduces rust concerns typical of metal boxes in wet environments and keeps the enclosure lightweight for easier handling. Its watertight characteristics make it suitable for poolside and landscape use where moisture exposure is a concern.

• Polymeric construction for corrosion resistance and light weight
• Internal space sized for up to four fixture terminations
• Designed for wet-area use around pools, spas, and landscapes

Who is this for? Electricians, pool and spa technicians, and DIY-savvy homeowners who need a reliable, moisture-resistant junction box for multiple light connections will find the Intermatic PJB4175 practical. It fits jobs that require mixing flexible cords and non-metallic conduit, simplifies grounding and access, and supports tidy installations in outdoor, wet-area settings where durable, code-minded enclosures are required.