Seaward NTB-1 Portable RCD Isolator

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The Seaward NTB-1 is the perfect adaptor for non-trip RCD testing. It is compatible with all PAT Testers.

rrp £99.00

now £64.50 (Ex. VAT) £77.40 (Inc. VAT)

rrp £99.00


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"Non-trip RCD testing adaptor"

  • Description

    Seaward NTB-1 Portable RCD Isolator

    The Seaward NTB-1 Portable RCD Isolator is an adaptor for use when RCD testing that allows users to test a portable RCD or RCD protected extension lead without the risk of tripping the main RCD in the installation. The NTB-1 portable RCD adaptor does this by providing an isolated mains supply which prevents unwanted tripping of any RCD at the main distribution board or consumer unit. This enables the user to continue testing without the worry of causing disruption to the premises they're working on. The Third Edition of the IEE Code of Practice has meant increased significance of RCD testing and it is now a common electrical test procedure. Many PAT testers now incorporate an RCD test and the Seaward Non Trip Box is a lightweight RCD adapter that can be used easily and effectively with any make of PAT tester or RCD test instrument.

    Part number: 372A953

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  • Delivery Information

    At we understand the importance of a reliable delivery service when shopping online. Especially when the goods are often essential to your working day. If your goods are required by a certain date please feel free to contact us for an honest and realistic indication whether this can be met. We aim to process all orders we receive within 1 to 3 working days, however from time to time we do have an increased demand for certain products or there might be delays from the manufacturer. In such cases delivery of your equipment may be subject to a minor delay.

    We use DPD/Interlink for all larger items and Royal Mail for smaller items and accessories. With DPD/Interlink you will receive a 1 hour delivery window on the day of delivery via e-mail/text and a notification 15 minutes before arrival so you will not have to wait around all day. You can even manage your booking online and re-arrange delivery for another date or arrange the goods to be left with a neighbour of your choice.

    We also offer delivery options for goods required urgently on certain products, all which are sent by DPD/Interlink.

    Our charges for UK deliveries:

    • FREE Delivery (on select products only): typically 3-5 working days*
    • Standard Delivery at £4.95: 2-3 working days
    • Next Working Day Delivery (on select products only) at £7.50
    • Pre-Noon Next Working Day Delivery (on select products only) at £9.50*
    • Pre-10.30am Next Working Day Delivery (on select products only) at £18.50*
    • Saturday Pre-Noon Delivery (on select products only) at £14.50*
    • Sunday Pre-Noon Delivery (on select products only) at £14.50*

    *UK mainland only

    NOTE! For next working day or Saturday/Sunday delivery options the order MUST be placed no later than 3pm on the working day before delivery is required. After 3pm, please arrange with our staff before selecting a priority delivery service. Priority services are available to UK mainland residents only (this might exclude certain areas in the north of Scotland).

    Customers outside the UK: exports to many countries all over the world. Prices for shipping vary on location and weight/dimensions. Costs are calculated for certain countries at the checkout. If your country is not included in this list please e-mail with your name, address and the items you would like to order for an accurate shipping quote or go to for more information.

    For more information on delivery, please see our terms and conditions.