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5A Junction Box 4-Terminal - White (59mm)

£149
The RRP is the manufacturer's recommended retail price of the item.
Limited Stock
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Minimum order for this item is 20.

Description

The Knightsbridge SN8400 is a 5A 4-terminal junction box with a 59mm diameter white thermoset resin case and selective cable entry points around the perimeter. The box houses four brass terminals inside a shallow 25mm-deep housing, allowing multiple lighting or low-load circuits to be joined or branched within ceiling voids, under floors, or behind wall linings.

Designed for fixed wiring installations in residential and commercial properties, the junction box suits lighting circuits rated up to 5A on 230V mains. The selective entry design allows cables to enter from any point around the circumference, with knock-out sections removed as needed during installation. The white thermoset resin case is fire-resistant and dimensionally stable under heat from connected loads, meeting BS EN 60670 for electrical accessory enclosures.

The IP20 rating means the box is suitable for dry indoor locations but not for outdoor use or damp environments such as bathrooms without additional IP-rated enclosures. The 59mm diameter and 25mm projection suit standard UK ceiling joist spacing and back-of-plasterboard installation without requiring deeper recesses. Knightsbridge backs the junction box with a 25-year warranty against manufacturing defects.

Specification
Diameter 59 mm
Projection 25 mm
Construction Thermoset resin
Finish White
IP Rating IP20
Primary Voltage 230V 50Hz
Warranty 25
Downloads

Product Specification Sheet

Frequently Asked

What cable sizes does it accept?

The junction box accepts standard UK lighting cable sizes, typically 1.0mm² or 1.5mm² twin-and-earth cable. The brass terminals inside accommodate multiple cores as needed for looping or branching circuits.

Can it be used in bathrooms?

The IP20 rating means the box is not inherently protected against water ingress. If used in a bathroom it must be positioned outside shower zones and enclosed within a higher IP-rated accessory or fitting to comply with wiring regulations.

What does selective entry mean?

Selective entry allows you to choose which points around the perimeter the cables enter from. Knock-out sections are removed during installation depending on cable routing, rather than the box having fixed pre-drilled entry holes.

Is it suitable for outdoor use?

No. The IP20 rating and thermoset resin construction are designed for dry indoor locations only. For outdoor installations use a junction box with an IP65 or IP66 rating and UV-resistant enclosure.

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.

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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.

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    Description

    The Knightsbridge SN8400 is a 5A 4-terminal junction box with a 59mm diameter white thermoset resin case and selective cable entry points around the perimeter. The box houses four brass terminals inside a shallow 25mm-deep housing, allowing multiple lighting or low-load circuits to be joined or branched within ceiling voids, under floors, or behind wall linings.

    Designed for fixed wiring installations in residential and commercial properties, the junction box suits lighting circuits rated up to 5A on 230V mains. The selective entry design allows cables to enter from any point around the circumference, with knock-out sections removed as needed during installation. The white thermoset resin case is fire-resistant and dimensionally stable under heat from connected loads, meeting BS EN 60670 for electrical accessory enclosures.

    The IP20 rating means the box is suitable for dry indoor locations but not for outdoor use or damp environments such as bathrooms without additional IP-rated enclosures. The 59mm diameter and 25mm projection suit standard UK ceiling joist spacing and back-of-plasterboard installation without requiring deeper recesses. Knightsbridge backs the junction box with a 25-year warranty against manufacturing defects.

    Specification
    Diameter 59 mm
    Projection 25 mm
    Construction Thermoset resin
    Finish White
    IP Rating IP20
    Primary Voltage 230V 50Hz
    Warranty 25
    Downloads

    Product Specification Sheet

    Frequently Asked

    What cable sizes does it accept?

    The junction box accepts standard UK lighting cable sizes, typically 1.0mm² or 1.5mm² twin-and-earth cable. The brass terminals inside accommodate multiple cores as needed for looping or branching circuits.

    Can it be used in bathrooms?

    The IP20 rating means the box is not inherently protected against water ingress. If used in a bathroom it must be positioned outside shower zones and enclosed within a higher IP-rated accessory or fitting to comply with wiring regulations.

    What does selective entry mean?

    Selective entry allows you to choose which points around the perimeter the cables enter from. Knock-out sections are removed during installation depending on cable routing, rather than the box having fixed pre-drilled entry holes.

    Is it suitable for outdoor use?

    No. The IP20 rating and thermoset resin construction are designed for dry indoor locations only. For outdoor installations use a junction box with an IP65 or IP66 rating and UV-resistant enclosure.

    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.