The genuine Pentair Brass Junction Box 78310500 is a rugged lighting infrastructure component designed for outdoor pool and spa wiring installations. Featuring a solid brass base paired with a polycarbonate cover, it delivers exceptional weather resistance and structural durability in challenging outdoor settings. Three 1/2-inch conduit ports provide orderly cable routing for connecting multiple light fixtures. Its understated black finish integrates naturally into poolside landscapes, while the compact footprint (5-3/8" x 3-5/8" top, 4-1/4" x 2-1/2" bottom) permits inconspicuous placement. UL-listed terminals guarantee correct grounding and adherence to NEC standards, making this junction box the right choice for safe, code-compliant lighting installations.

Key Benefits

• Engineered for Outdoor Lighting: Built for pool and spa environments, combining a solid brass base with a weatherproof polycarbonate cover for years of dependable service.
• Organized Cable Management: Three 1/2" conduit ports enable neat, efficient wire routing for multiple light hookups, simplifying both initial setup and future service work.
• Small, Discreet Footprint: Its low-profile design tucks into tight outdoor areas without sacrificing cable accessibility or safety.
• NEC-Compliant Grounding: Equipped with grounding terminals and strain relief connections per National Electrical Code requirements, supporting safe installation by qualified electricians.
• Professional-Grade Finish: The black exterior provides a clean, polished appearance while adding an extra layer of protection against environmental wear.

What's Included

• Pentair 78310500 Brass Junction Box

Compatibility

• Pentair Pool and Spa Lights

Specifications

• Brand: Pentair
• Part Number: 78310500

Installation & Operation Tips

A. THE FOLLOWING PREPARATORY STEPS MUST BE COMPLETED BY THE CERTIFIED ELECTRICIANÊBEFORE LIGHT IS INSTALLED1. Ensure that the electrical system of your pool conforms with all requirements of the National Electrical Code (NEC),and all local codes and ordinances. A licensed or certified electrician must install the electrical system to meet orexceed those requirements before the Junction Box is installed. Some of the NEC requirements are listed below.2. To be certain that the pools electrical system meets all applicable requirements, the electrician shouldalso consult the local building department.3. Position Junction Box to meet National Electrical Code (NEC) requirements and to prevent hazard to personnel.

4. The center conduit hub is provided with a strain relief for a cord size up to a 10/3 AWG cord. Use underwater lightswith water resistant cord only.5. Three equipment grounding terminals are provided for internal grounding suitable for #16 AWG to #10 AWG wire.One pressure wire grounding terminal is provided for a #8 AWG insulated copper bonding wire.6. Install the Junction Box gasket between the Junction Box base and cover. Replace gasket if worn or damaged (P/N79300600).7. Plug any unused conduit hubs with the conduit plugs provided.

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