Free Delivery on all orders over £99*

Knightsbridge 9-12 Gang 35mm Galvanised Steel Back Box

£599
The RRP is the manufacturer's recommended retail price of the item.
Limited Stock
We are an Independent UK Company
Price match. Found it cheaper? Contact us
Trade Discount Available
Description

The Knightsbridge 9-12 gang galvanised steel back box is a 35mm-deep flush-mounting enclosure measuring 199mm high by 134mm wide, designed to house 9-12 gang modular grid systems. The galvanised steel construction resists corrosion and provides a rigid mounting platform for grid mounting frames, with an integrated earth terminal for safe connection of metal faceplates and modules.

Used in commercial and residential installations where multiple switches, sockets, or data modules need to be grouped into a single faceplate location, this back box pairs with Knightsbridge's range of grid mounting frames and accepts both flat plate and screwless faceplate styles. The 35mm depth accommodates standard grid modules and switch mechanisms without requiring deeper chasing into plasterboard or masonry, making it suitable for retrofits where wall depth is limited.

The box is supplied with multiple knockout points for cable entry from the top, bottom, sides and rear, allowing flexible conduit routing depending on the wall cavity configuration. Pre-punched fixing holes at each corner accept standard screws for securing to masonry or timber studs. The galvanised finish on the steel prevents oxidation in humid environments and provides reliable long-term performance behind the wall.

Specification
Height 199 mm
Width 134 mm
Depth 36 mm
Construction Steel
IP Rating IP20
Earth Terminal Yes
Warranty 25
Downloads

Product Specification Sheet

Frequently Asked

What grid systems is this back box compatible with?

The box accepts Knightsbridge 9-12 gang grid mounting frames and faceplates, both flat plate and screwless styles. It works with standard modular grid components including switches, sockets, data modules and blanking plates.

What wall depth is needed for installation?

The 35mm depth requires a minimum 40mm chase depth in masonry or plasterboard to allow the box to sit flush with the finished wall surface and leave clearance for plastering or finishing around the faceplate edge.

How are cables fed into the box?

The box has multiple knockout points on all sides and the rear for cable entry. Knockouts can be removed with a screwdriver or punch depending on the conduit route required by the installation.

Does it have an earth terminal?

Yes. An integrated earth terminal inside the box allows safe connection of metal faceplates and ensures continuity with the main earthing system.

Shipping & Returns

Delivery UK delivery is £14.99, and delivery is free on all orders of £99 or more, in the UK and internationally.

Returns If you change your mind, you have 14 days from delivery to tell us, and a further 14 days to send the goods back. Return postage for a change-of-mind return is paid by you. Change-of-mind returns are subject to an inspection and handling deduction. See our full returns policy.

To arrange a return, call us on 020 8149 5199 or use our contact page.

See it lit, in person

Lighting looks different in a real room. Come and see our range at our showrooms in Birmingham, Hong Kong and Dubai, or talk to our design team wherever you are.

Niori lighting showroom trailer video with closeups of alabaster lighting

Why Niori

Over 20 years lighting homes worldwide

We are a specialist lighting and mirror retailer with showrooms in Birmingham, Hong Kong and Dubai, shipping to customers around the world. Our own design team is here to help, from first idea to final fitting.

Genuine products

An authorised stockist

Every product arrives brand new with the full manufacturer warranty. Found it cheaper elsewhere? Ask us about a price match.

Installation

Fits standard UK back boxes

Designed to fit standard UK back boxes for a straightforward swap of your existing fittings.

Ordering with us

Free delivery over £99

Free delivery on orders over £99, in the UK and worldwide. Easy returns within 14 days, subject to our returns policy. Full manufacturer warranty included.

You Might Also Like

Recommended For You

    Our Reviews

    From first click to final installation, our customers share how Niori lights up their spaces. Read their words and envision what’s possible for yours.

    Featured Projects

    Step into our portfolio and see how we transform homes, restaurants, and commercial spaces and more, worldwide. Click here for a closer look at our latest projects.

    Description

    The Knightsbridge 9-12 gang galvanised steel back box is a 35mm-deep flush-mounting enclosure measuring 199mm high by 134mm wide, designed to house 9-12 gang modular grid systems. The galvanised steel construction resists corrosion and provides a rigid mounting platform for grid mounting frames, with an integrated earth terminal for safe connection of metal faceplates and modules.

    Used in commercial and residential installations where multiple switches, sockets, or data modules need to be grouped into a single faceplate location, this back box pairs with Knightsbridge's range of grid mounting frames and accepts both flat plate and screwless faceplate styles. The 35mm depth accommodates standard grid modules and switch mechanisms without requiring deeper chasing into plasterboard or masonry, making it suitable for retrofits where wall depth is limited.

    The box is supplied with multiple knockout points for cable entry from the top, bottom, sides and rear, allowing flexible conduit routing depending on the wall cavity configuration. Pre-punched fixing holes at each corner accept standard screws for securing to masonry or timber studs. The galvanised finish on the steel prevents oxidation in humid environments and provides reliable long-term performance behind the wall.

    Specification
    Height 199 mm
    Width 134 mm
    Depth 36 mm
    Construction Steel
    IP Rating IP20
    Earth Terminal Yes
    Warranty 25
    Downloads

    Product Specification Sheet

    Frequently Asked

    What grid systems is this back box compatible with?

    The box accepts Knightsbridge 9-12 gang grid mounting frames and faceplates, both flat plate and screwless styles. It works with standard modular grid components including switches, sockets, data modules and blanking plates.

    What wall depth is needed for installation?

    The 35mm depth requires a minimum 40mm chase depth in masonry or plasterboard to allow the box to sit flush with the finished wall surface and leave clearance for plastering or finishing around the faceplate edge.

    How are cables fed into the box?

    The box has multiple knockout points on all sides and the rear for cable entry. Knockouts can be removed with a screwdriver or punch depending on the conduit route required by the installation.

    Does it have an earth terminal?

    Yes. An integrated earth terminal inside the box allows safe connection of metal faceplates and ensures continuity with the main earthing system.

    Shipping & Returns

    Delivery UK delivery is £14.99, and delivery is free on all orders of £99 or more, in the UK and internationally.

    Returns If you change your mind, you have 14 days from delivery to tell us, and a further 14 days to send the goods back. Return postage for a change-of-mind return is paid by you. Change-of-mind returns are subject to an inspection and handling deduction. See our full returns policy.

    To arrange a return, call us on 020 8149 5199 or use our contact page.