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BT Master Telephone Socket - Polished Chrome Screwless

£1199
The RRP is the manufacturer's recommended retail price of the item.
Limited Stock
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Description

The Knightsbridge SF7300PC is a BT master telephone socket with an integrated surge arrestor and RC circuit filter, housed behind a polished chrome screwless faceplate. The master socket provides the primary termination point for incoming telephone lines, allowing service providers to obtain a fixed resistance value during line diagnostics without needing to access secondary extension sockets downstream.

Designed for residential and commercial installation, the socket fits a standard 25mm minimum back box depth and uses screw terminals for secure cable connection. The screwless cover plate clips onto a separate metal sub-frame, giving a clean finish with no visible fixings on the wall once installed. The built-in gasket between the faceplate and sub-frame provides a dust-resistant seal around the socket aperture.

The polished chrome finish is achieved on 201 stainless steel, providing a reflective metallic surface that pairs well with contemporary interiors and other polished chrome electrical accessories. The low-profile design adds only 4.3mm projection from the wall once fitted, keeping the socket flush with plasterwork. Certified to BS 5733 for telephone master sockets, the unit includes overcurrent protection via the surge arrestor to protect connected telephone equipment during electrical transients on the line.

Specification
Height 87.5mm
Width 87.5mm
Depth 22.9mm
Projection 4.3mm
Recessed Depth 18.6mm
Min. Mounting Box Depth 25mmmm
Plate Depth 4.3mm
Construction 201 Stainless steel
Finish Polished Chrome
IP Rating IP20
Terminal Screw
Warranty 2 Year Guarantee
Downloads

Product Specification Sheet

Frequently Asked

What's the difference between a master socket and an extension socket?

The master socket is the primary termination point for the incoming telephone line from the service provider. It includes a surge arrestor and RC filter to protect the line and allow diagnostics. Extension sockets downstream connect to the master socket and do not include these protective components.

What back box depth is required?

A 25mm minimum back box depth is needed for safe installation. The screwless cover plate adds 4.3mm of projection from the wall once fitted, giving a low-profile finish.

Is the screwless plate removable for redecorating?

Yes. The polished chrome cover plate clips onto a separate metal sub-frame fixed to the back box. The cover can be removed for painting around the socket and re-clipped without disturbing the wiring.

What other finishes are available in this range?

Knightsbridge produces master telephone sockets in a range of finishes including polished chrome, brushed chrome, polished brass, antique brass, matt black and white. Use the search function or filters to find other variants in stock at Niori.

Shipping & Returns

Free worldwide delivery

Free worldwide delivery on all orders over £99. International orders for third-party brand products may be subject to an additional courier surcharge based on volumetric weight, particularly on larger lighting fixtures — if a surcharge applies, our team will email you with the amount before dispatch and you can proceed or cancel for a full refund. See full delivery terms.

Returns

30-day returns window from delivery. As all our products are electrical or lighting goods, returned items must be inspected and recertified by a qualified electrician before resale — the cost of this inspection (25–40% of the item value) is deducted from your refund. Customers pay return shipping. Made-to-order, special-order and clearance items cannot be returned. See full returns policy.

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    Description

    The Knightsbridge SF7300PC is a BT master telephone socket with an integrated surge arrestor and RC circuit filter, housed behind a polished chrome screwless faceplate. The master socket provides the primary termination point for incoming telephone lines, allowing service providers to obtain a fixed resistance value during line diagnostics without needing to access secondary extension sockets downstream.

    Designed for residential and commercial installation, the socket fits a standard 25mm minimum back box depth and uses screw terminals for secure cable connection. The screwless cover plate clips onto a separate metal sub-frame, giving a clean finish with no visible fixings on the wall once installed. The built-in gasket between the faceplate and sub-frame provides a dust-resistant seal around the socket aperture.

    The polished chrome finish is achieved on 201 stainless steel, providing a reflective metallic surface that pairs well with contemporary interiors and other polished chrome electrical accessories. The low-profile design adds only 4.3mm projection from the wall once fitted, keeping the socket flush with plasterwork. Certified to BS 5733 for telephone master sockets, the unit includes overcurrent protection via the surge arrestor to protect connected telephone equipment during electrical transients on the line.

    Specification
    Height 87.5mm
    Width 87.5mm
    Depth 22.9mm
    Projection 4.3mm
    Recessed Depth 18.6mm
    Min. Mounting Box Depth 25mmmm
    Plate Depth 4.3mm
    Construction 201 Stainless steel
    Finish Polished Chrome
    IP Rating IP20
    Terminal Screw
    Warranty 2 Year Guarantee
    Downloads

    Product Specification Sheet

    Frequently Asked

    What's the difference between a master socket and an extension socket?

    The master socket is the primary termination point for the incoming telephone line from the service provider. It includes a surge arrestor and RC filter to protect the line and allow diagnostics. Extension sockets downstream connect to the master socket and do not include these protective components.

    What back box depth is required?

    A 25mm minimum back box depth is needed for safe installation. The screwless cover plate adds 4.3mm of projection from the wall once fitted, giving a low-profile finish.

    Is the screwless plate removable for redecorating?

    Yes. The polished chrome cover plate clips onto a separate metal sub-frame fixed to the back box. The cover can be removed for painting around the socket and re-clipped without disturbing the wiring.

    What other finishes are available in this range?

    Knightsbridge produces master telephone sockets in a range of finishes including polished chrome, brushed chrome, polished brass, antique brass, matt black and white. Use the search function or filters to find other variants in stock at Niori.

    Shipping & Returns

    Free worldwide delivery

    Free worldwide delivery on all orders over £99. International orders for third-party brand products may be subject to an additional courier surcharge based on volumetric weight, particularly on larger lighting fixtures — if a surcharge applies, our team will email you with the amount before dispatch and you can proceed or cancel for a full refund. See full delivery terms.

    Returns

    30-day returns window from delivery. As all our products are electrical or lighting goods, returned items must be inspected and recertified by a qualified electrician before resale — the cost of this inspection (25–40% of the item value) is deducted from your refund. Customers pay return shipping. Made-to-order, special-order and clearance items cannot be returned. See full returns policy.