Tower WAG16JB 16-Way Lever Junction Box

Streamline your domestic central heating installations with the Tower WAG16JB 16-Way Junction Box. Engineered specifically for professional heating engineers, this robust wiring unit provides a neat, reliable, and highly efficient solution for interconnecting complex heating control systems. Whether you are installing a standard S-Plan or a Y-Plan system, the WAG16JB simplifies the process, reducing on-site installation time and minimising wiring errors.

Optimised for S-Plan and Y-Plan Heating Systems

The Tower 16-Way Wiring Unit features an intelligent internal layout designed to accommodate standard boiler, pump, motorised valve, programmer, and thermostat interconnections. With factory-engineered pre-wired internal links, installers can confidently separate live, neutral, earth, and switched live connections. The spacious enclosure offers adequate room for wiring bunching while maintaining a clean, professional finish inside airing cupboards or plant rooms.

Key Features & Benefits

• Tool-Free Connections: Equipped with premium lever connectors for fast, secure, and tool-free wire termination.
• Pre-Wired Internal Links: Includes 4 pre-linked neutral terminals and 4 separate pre-linked earth terminals to speed up commissioning.
• Versatile Cable Entry: Features 4 knockouts for neat in-wall wiring and 6 surface-mounting knockouts complete with integrated cable restraints.
• Wide Cable Compatibility: Designed to accommodate flexible multi-core cable sizes ranging from 0.34mm² up to 4mm².
• Future-Proof Design: The spacious 16-way layout allows for seamless future system expansion, such as adding extra heating zones or smart thermostat controls.

Technical Specifications

Safety Note: All electrical wiring must comply with current I.E.E. wiring regulations and must be carried out by a qualified installer. Ensure the unit is protected with a 3A fuse and appropriate switch isolation before operation.