Pentair Brass Junction Box For Lights | 1/2" | 3 Port | 78310500

The OEM Pentair Brass Junction Box 78310500 is a durable component designed for pool and spa lighting systems. It features a polycarbonate cover and a brass base, offering strong resistance to weather and environmental factors. This junction box includes three 1/2-inch ports for efficient cable management, making it suitable for various light installations. The compact size—5-3/8" x 3-5/8" at the top and 4-1/4" x 2-1/2" at the bottom—ensures it fits well into most setups without being obtrusive. Additionally, the black finish blends seamlessly with outdoor environments, making it both functional and aesthetically pleasing.

Highlights

• Durable Construction: The Pentair Brass Junction Box 78310500 features a brass base and a polycarbonate cover, providing excellent resistance to weather and environmental factors, making it ideal for pool and spa lighting systems.

• Efficient Cable Management: With three 1/2-inch ports, this junction box allows for organized and efficient cable routing, supporting various light installations with ease.

• Compact and Versatile Design: Measuring 5-3/8" x 3-5/8" at the top and 4-1/4" x 2-1/2" at the bottom, the junction box is compact, making it easy to integrate into most setups without being obtrusive.

• Sleek Black Finish: The black finish helps the junction box blend seamlessly into outdoor environments, ensuring it remains functional while maintaining a clean and discreet appearance in your pool or spa area.

Includes

• (1) Pentair 78310500 Brass Junction Box

Compatibility

• Pentair Pool and Spa Lights

Instructions

A. THE FOLLOWING PREPARATORY STEPS MUST BE COMPLETED BY THE CERTIFIED ELECTRICIAN BEFORE LIGHT IS INSTALLED
1. 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 or
exceed those requirements before the Junction Box is installed. Some of the NEC requirements are listed below.
2. To be certain that the pool’s electrical system meets all applicable requirements, the electrician should
also 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 lights
with 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/N
79300600).
7. Plug any unused conduit hubs with the conduit plugs provided.

Additional Info

Shopping online for the Pentair 78310500 Junction Box? These FAQs help you confirm compatibility, installation standards, and shipping details before ordering from SOSPool.com or similar outlets.

Ordering a Junction Box Online

This model supports underwater lights and conforms to NEC standards. It comes with a gasket and screw-on lid for easy setup.

Is this junction box available for fast shipping online?

Does SOSPool.com carry the official Pentair OEM part?

What size cord does the strain relief support?

Does the product page include installation guidelines?

Can I return it if my electrician says it's incompatible?

Key Features to Consider

A weather-resistant design, black finish, and 3 conduit hubs make this box a great fit for most pool lighting systems.

What ports and terminals are included with the box?

Is the black polycarbonate cover UV-resistant?

What’s included in the box—do I need extra parts?

Can it support lights with multiple cords?

Is the brass base corrosion-resistant?

How to Confirm Fit and Compliance

Ensure your lighting system is up to code and ready for connection before you install. This box is sized to fit discreetly and perform reliably.

What are the box’s top and bottom measurements?

Is this the correct replacement for an old 78310500?

Will this mount flush to my pool deck?

Are NEC guidelines linked on the product page?

Does it ship with conduit plugs and gasket included?