Honeywell Home Sundial Plan Wiring Centre | 42005748-001 Universal Heating Control Junction Box

The Honeywell Home Wiring Centre 42005748-001 is a universal junction box designed to simplify wiring for Sundial Plan central heating systems including C, S, and Y configurations. Featuring dedicated labelled terminals for all components, pre-wired links, and on-board fusing, it eliminates complex wiring diagrams for professional installations.

Key Features

• 37 clearly labelled terminals - one wire per connection for error-free wiring.
• Pre-configured jumper links match numbered diagrams in Honeywell Wiring Guide.
• 2A on-board fuse with spare provides circuit protection.
• Fire-retardant ABS enclosure with cable clamps and strain relief.
• Reversible lid and base for top/bottom cable entry flexibility.
• Supports basic and pump overrun boilers across all 5A applications.

Why Choose Honeywell Wiring Centre?

Industry standard for UK heating installers, dramatically reducing commissioning time while ensuring compliance with Sundial Plan wiring conventions.

No additional instructions required - simply follow numbered terminal references from Honeywell guides.

Suitable For

• Sundial Plan C, S, Y systems with motorised valves and thermostats.
• Domestic boiler installations requiring professional wiring hub.
• New builds and system upgrades following Honeywell wiring standards.

Technical Specifications

• Brand: Honeywell Home by Resideo
• Model: Sundial Plan Wiring Centre
• MPN: 42005748-001
• GTIN: 5025121384735
• Terminals: 37 positions, max 1.5 mm² wire
• Maximum Current: 5A @ 230V 50Hz (PCB)
• Fuse Rating: 2A 230V 50Hz (with spare)
• Cable Clamps: 2 x 4-way (1.5 mm² twin & earth)
• Ambient Rating: T50
• Fixing: 3 x No.8 screw holes
• Enclosure: Fire-retardant PC/ABS
• Compliance: EC Directive 2006/95/EC
• Weight: 0.3 kg

Installation & Compatibility

Mounts directly to wall or surface with reversible orientation. Cut pre-wired links per lid instructions to configure for specific boiler/zoning layout. Compatible with all Honeywell Sundial Plan thermostats, motorised valves, and pump controls.