The Drayton LWC1 Wiring Centre and LWC3 Junction Box provide a safe, tidy way to connect the wiring on a domestic heating system, letting boilers, pumps, room thermostats, programmers and cylinder stats all land on one clearly labelled terminal block. Both are manufactured in flame-retardant plastic with large diameter wiring terminals rated at 10A, and are supplied with cable clamps for a secure, professional installation.
The LWC1 is a 16-way wiring centre supplied with wiring links to suit most common heating system layouts, plus cable identification labels and full installation instructions. The LWC3 is a 12-way junction box with top or bottom cable entry bays, giving installers more flexibility when routing cables into tighter spaces. Drayton publishes 24 wiring diagrams covering the most popular BIFLO and twin-zone configurations with both units.
BS EN 60670-22
Compliance
Flame-Retardant
Plastic Body
ℹ Good to Know: Choose the LWC1 for a full 16-way wiring centre with pre-fitted wiring links suited to most heating systems, or the LWC3 12-way junction box where top or bottom cable entry flexibility is needed.
Safe, Simplified Wiring
Both units give a safe means of connection for heating system controls, simplifying wiring and circuit testing so every cable lands on a clearly identified terminal.
Large Diameter Terminals
Large wiring terminals rated at 10A make it easier to land solid or stranded cable securely, even in a crowded wiring centre.
Flame-Retardant Construction
Both the LWC1 and LWC3 are manufactured in flame-retardant plastic, supporting safe long-term operation in an airing cupboard or plant room.
Cable Clamps Included
Supplied with cable clamps on both models, keeping incoming cables strain-relieved and tidy at the point of entry.
LWC1: Wiring Links Included
The LWC1 ships with wiring links to suit most systems, along with cable identification labels and full installation instructions for common heating layouts.
LWC3: Flexible Cable Entry
The LWC3 offers top or bottom cable entry bays, giving installers more routing options in confined cupboards or where cables approach from different directions.
Shared Specification
Compliance
BS EN 60670-22
Material
Flame-retardant plastic
Large diameter wiring terminals
Yes
Specification
LWC1 Wiring Centre (28001)
LWC3 Junction Box (28003)
Product type
16-way wiring centre
12-way junction box
Dimensions (H x W x D)
171.5mm x 124.5mm x 41mm
146mm x 97mm x 25mm
Wiring links provided
Yes, to suit most systems
Not included
Cable identification labels
Included, with full installation instructions
Not included
Top or bottom cable entry bays
Not applicable
Yes
What is the difference between the LWC1 and LWC3?
The LWC1 is a 16-way wiring centre supplied with wiring links and cable identification labels to suit most heating systems. The LWC3 is a 12-way junction box with top or bottom cable entry bays but without pre-fitted wiring links or labels.
What is a wiring centre used for?
A wiring centre provides a safe and convenient method of system wiring, allowing all heating controls — such as the boiler, pump, programmer, room thermostat and cylinder stat — to be neatly connected in one place, making testing and future fault-finding straightforward.
Are wiring diagrams available for these products?
Yes. Drayton publishes a set of wiring diagrams covering common layouts including BIFLO and twin-zone systems, both with and without pump overrun, digistat receivers, and unvented mains pressure cylinders, for use with the LWC1 and LWC3.
What is the terminal rating?
Both the LWC1 and LWC3 have terminals rated at 10A.
Do these units come with cable clamps?
Yes, both the LWC1 and LWC3 are supplied with cable clamps as standard.
