Free Delivery on all orders over £99*

Socket Tester BS 1363 - Knightsbridge TE3

£899
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 TE3 is a plug-in socket tester for UK BS 1363 13A sockets, designed to verify correct wiring after installation or when diagnosing faults in existing sockets. The tester uses three brass pins that plug directly into the socket under test, drawing mains power to illuminate a series of LED indicators that show the status of live, neutral and earth connections.

Intended for electricians, facilities maintenance teams and DIY installers working on domestic or light commercial electrical work, the TE3 checks six common wiring faults: outlet wired correctly, missing earth, live/neutral reverse, missing neutral, live/earth reverse, and wiring fault combinations. The LED pattern displayed on the blue polycarbonate face corresponds to a fault diagnosis chart printed on the unit, allowing immediate identification of incorrect wiring without needing a separate reference sheet.

The compact 66mm x 66mm x 48mm polycarbonate body fits easily into a tool pouch or electrician's kit and weighs approximately 60g. The tester operates at 230V 50Hz mains voltage and carries IP20 ingress protection, meaning it is suitable for dry indoor use only and must not be used in damp locations, bathrooms or outdoor sockets. The unit is certified to EN 61326 and EN 61000 electromagnetic compatibility standards.

Specification
Height 66 mm
Width 66 mm
Depth 48 mm
Projection 26 mm
Construction Polycarbonate
Finish Blue
IP Rating IP20
Primary Voltage 230V 50Hz
Warranty 1
Downloads

Product Specification Sheet

Frequently Asked

What faults does the TE3 detect?

The tester checks for six fault conditions: correct wiring, missing earth, live/neutral reverse, missing neutral, live/earth reverse, and wiring fault. The LED pattern corresponds to a printed chart on the face of the unit showing which fault is present.

Can it be used in bathrooms or outdoor sockets?

No. The TE3 carries IP20 ingress protection, meaning it is designed for dry indoor use only. It must not be used to test sockets in bathrooms, kitchens near water sources, or outdoor locations where moisture may be present.

Does it work on RCD-protected circuits?

The tester draws minimal current from the socket and should not trip a functional RCD under normal operation. However, if the socket wiring has a fault that creates an earth leakage path, the RCD may trip during testing, which itself indicates a problem requiring investigation.

Is the tester sold with instructions?

The fault diagnosis chart is printed directly on the face of the unit. A full product specification sheet is available in the Downloads tab above and includes additional guidance on interpreting LED patterns.

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.

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.

Design help

Not sure what you need?

Our design team can help you plan your lighting, share photos and videos of stock, and send samples worldwide. Book a showroom visit in Birmingham, Hong Kong or Dubai, or ask about our lighting design service.

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 TE3 is a plug-in socket tester for UK BS 1363 13A sockets, designed to verify correct wiring after installation or when diagnosing faults in existing sockets. The tester uses three brass pins that plug directly into the socket under test, drawing mains power to illuminate a series of LED indicators that show the status of live, neutral and earth connections.

    Intended for electricians, facilities maintenance teams and DIY installers working on domestic or light commercial electrical work, the TE3 checks six common wiring faults: outlet wired correctly, missing earth, live/neutral reverse, missing neutral, live/earth reverse, and wiring fault combinations. The LED pattern displayed on the blue polycarbonate face corresponds to a fault diagnosis chart printed on the unit, allowing immediate identification of incorrect wiring without needing a separate reference sheet.

    The compact 66mm x 66mm x 48mm polycarbonate body fits easily into a tool pouch or electrician's kit and weighs approximately 60g. The tester operates at 230V 50Hz mains voltage and carries IP20 ingress protection, meaning it is suitable for dry indoor use only and must not be used in damp locations, bathrooms or outdoor sockets. The unit is certified to EN 61326 and EN 61000 electromagnetic compatibility standards.

    Specification
    Height 66 mm
    Width 66 mm
    Depth 48 mm
    Projection 26 mm
    Construction Polycarbonate
    Finish Blue
    IP Rating IP20
    Primary Voltage 230V 50Hz
    Warranty 1
    Downloads

    Product Specification Sheet

    Frequently Asked

    What faults does the TE3 detect?

    The tester checks for six fault conditions: correct wiring, missing earth, live/neutral reverse, missing neutral, live/earth reverse, and wiring fault. The LED pattern corresponds to a printed chart on the face of the unit showing which fault is present.

    Can it be used in bathrooms or outdoor sockets?

    No. The TE3 carries IP20 ingress protection, meaning it is designed for dry indoor use only. It must not be used to test sockets in bathrooms, kitchens near water sources, or outdoor locations where moisture may be present.

    Does it work on RCD-protected circuits?

    The tester draws minimal current from the socket and should not trip a functional RCD under normal operation. However, if the socket wiring has a fault that creates an earth leakage path, the RCD may trip during testing, which itself indicates a problem requiring investigation.

    Is the tester sold with instructions?

    The fault diagnosis chart is printed directly on the face of the unit. A full product specification sheet is available in the Downloads tab above and includes additional guidance on interpreting LED patterns.

    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.