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- Junction & Pattress Boxes
Junction & Pattress Boxes
Secure Junction & Pattress Boxes for Neat and Compliant Wiring
Choose from our range of durable junction and pattress boxes—essential for organizing connections and protecting wiring in both wall and surface installations. Whether you're mounting switches, outlets, or lighting fixtures, these boxes support safe cable routing, easy mounting, and compliance with building regulations. Explore related categories like Electrical Accessories, Cable & Cable Management, and Cable Reels & Extension Leads to complete your electrical toolkit.
Sparkpak Cavity Box 1 Gang 35mm
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Sparkpak Cavity Box 2 Gang 35mm
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Sparkpak Junction Box 3T 30A White
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Sparkpak Metal Box 1 Gang 35mm
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Sparkpak Metal Box 2 Gang 35mm
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30 Day Return Policy
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Choosing the Right Junction & Pattress Box
At County Building Supplies, we supply junction, cavity and metal boxes for trade professionals, builders and DIY customers. These products provide suitable enclosures and mounting points for electrical connections, sockets and switches, helping keep wiring organised and protected as part of an electrical installation.
Cavity Box or Metal Box?
The right electrical box depends primarily on the type of wall and accessory being installed. County Building Supplies stocks Sparkpak cavity boxes and metal boxes in 1-gang and 2-gang options.
- Cavity boxes are designed for suitable hollow-wall installations, such as plasterboard walls, providing a mounting point for compatible switches and sockets.
- Metal boxes are commonly used for suitable flush-mounted electrical accessories within solid wall installations.
- Junction boxes provide an enclosure for suitable electrical cable connections and terminals.
Before choosing a box, check the wall construction, accessory size, number of gangs and required box depth to make sure the product is suitable for the installation.
1-Gang or 2-Gang?
The term gang relates to the size and configuration of the electrical accessory being installed. A 1-gang box is designed for compatible single-width accessories, while a 2-gang box accommodates compatible wider accessories such as a typical double socket.
County Building Supplies stocks both 1-gang and 2-gang Sparkpak boxes, allowing you to match the box to the electrical accessory being fitted.
Why Does Box Depth Matter?
Electrical boxes are available in different depths to provide space for wiring, terminals and the electrical accessory itself. Our current Sparkpak cavity and metal box range includes 35mm deep options.
The depth required depends on the accessory, wiring and installation, so always check that there is sufficient space for the intended electrical connections without damaging or excessively bending cables.
Using Junction Boxes
Junction boxes provide a protective enclosure for suitable electrical connections. County Building Supplies stocks the Sparkpak 3-terminal 30A junction box for appropriate applications.
Electrical connections should use products with the correct specification and rating for the circuit and should remain compliant with applicable wiring requirements.
Need Help Finding a Product?
If you know the type and size of electrical box required, visit your local County Building Supplies branch or contact our team. We can help you find a suitable product from our range and check availability at your local branch.
Frequently Asked Questions – Junction & Pattress Boxes
What is a pattress box?
A pattress or mounting box provides an enclosure and fixing point for compatible electrical accessories such as switches and sockets. Different types are available depending on the wall construction, accessory and installation method.
What's the difference between a cavity box and a metal box?
A cavity box is designed for suitable hollow-wall installations, such as plasterboard partitions, while metal boxes are commonly used for flush-mounted accessories within solid wall installations. The correct type depends on the construction and electrical accessory being fitted.
What's the difference between a junction box and a pattress box?
A junction box is primarily designed to contain suitable electrical cable connections, while a pattress or mounting box provides an enclosure and fixing point for an electrical accessory such as a socket or switch.
What does 1-gang and 2-gang mean?
Gang relates to the size or configuration of the electrical accessory. A 1-gang box accommodates compatible single-width accessories, while a 2-gang box is designed for compatible wider accessories such as typical double sockets.
What does 35mm mean on an electrical box?
35mm refers to the depth of the box. Box depth is important because sufficient space is required behind the electrical accessory for cables and connections. The appropriate depth depends on the accessory and installation.
Can I use a cavity box in plasterboard?
Cavity boxes are designed for suitable hollow-wall applications, including many plasterboard installations. Check the wall construction, board thickness and manufacturer's installation requirements before fitting.
What is a junction box used for?
A junction box provides an enclosure for suitable electrical cable connections and terminals. The box and connections must be correctly rated and suitable for the circuit and installation.
What does 30A mean on a junction box?
The ampere rating forms part of the electrical specification of the junction box. Electrical accessories and connections must be appropriately rated for the circuit in which they're installed, so the product specification should always be checked before use.
Do you stock Sparkpak junction and cavity boxes?
Yes. County Building Supplies stocks Sparkpak electrical boxes, including 1-gang and 2-gang 35mm cavity boxes, 1-gang and 2-gang 35mm metal boxes and a 3-terminal 30A junction box. Product availability may vary by branch.
Do you deliver electrical accessories?
Yes. County Building Supplies offers local delivery for electrical accessories and other building supplies across our trading area. Delivery options and availability may vary depending on your location and order, so contact your nearest branch for more information.
County Building Supplies (Holdings) Ltd. 52A St. Andrew's Road, Malvern, Worcestershire, WR14 3PP.
Find your local County branch / Email: sales@countyonline.co.uk.