Socket & See CB400 Non-Trip Installation Testing Calibration Checkbox

Socket & See

£273.00 / £327.60 incl VAT

⚡ Non-trip RCD testing method

⚡ Reduces expensive calibration costs

⚡ Continually validate your instruments through regular self-calibration checks

⚡ Null facility to remove lead resistance

⚡ 2 Year Socket & See Warranty

In stock (can be backordered)

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SKU: SOC-CB400 Category: Brand:

Description

Socket & See CB400 Non-Trip Installation Testing Calibration Checkbox

The Socket & See CB400 Non-Trip Installation Testing Calibration Checkbox performs reliable installation checks, ensuring test equipment meets current wiring regulations. The CB400 is capable of checking six insulation, three loop check, five RCD and five continuity levels (plus checks installation testing correct output).

The CB400, featuring a useful null facility, operates correctly with all leading makes of Insulation/Continuity, Loop and RCD testers regardless of multifunction or single operation. Designed to be exceedingly user friendly, simply plug the checkbox into the mains supply before connecting your equipment and recording the results.

Contained within a tough, drop-proof watertight case for use on site and easy carrying capability, the CB400 offers compliance to – BS EN 61557 Test Instrument Requirements.

 

Key Features:

  • Non-Trip Installation Testing Calibration Checkbox
  • Installation checks guarantees equipment conforms to regulations
  • Check six insulation levels – 0.25, 0.5, 1.0, 2.0, 10 & 200MΩ
  • Three Loop check levels
  • Five checks covering 30mA and 100mA RCD’s
  • Five continuity check levels – 0.5, 1.0, 2.0, 100 & 2000Ω
  • Checks RCD over current test
  • Null facility to remove lead resistance
  • Rugged, IP54 rated outer casing
  • Full calibration documentation

Socket & See Part Number: SOC/CB400

Socket & See CB400 Non-Trip Installation Testing Calibration Checkbox Technical Specifications

FunctionCheck ValuesAccuracyRating
Insulation Test0.25MΩ1%Up to 1000V
0.5MΩ1%Up to 1000V
1.0MΩ1%Up to 1000V
2.0MΩ1%Up to 1000V
10MΩ1%Up to 1000V
200MΩ2%Up to 1000V
Output Voltage 3 Bands250V @ 0.25MΩN/A
500V @ 0.5MΩ
1000V @ 1.0MΩ
Continuity TestNULL1%±20MΩCurrent Rating 1A
0.5Ω1%±20MΩCurrent Rating 1A
1.0Ω1%±20MΩCurrent Rating 1A
2.0Ω1%±20MΩCurrent Rating 1A
100Ω1%Current Rating 250mA
2000Ω1%Current Rating 25mA
Loop TestLocalN/ACurrent Rating 25A (Pulsed) 10ms pulses
Additional 1Ω1%±20MΩ
Additional 100Ω1%
RCD Test30mA (x1)5%30mA AC Type
30mA (x5)5%30mA AC Type
30mA (x1/2)5%30mA AC Type
100mA (x1)5%100mA AC Type
100mA (x1/2)5%30mA AC Type and ACS Type
Current Break Time 38ms ±N/AN/A
LED for Current Accuracy>200mA @2Ω1%
Case Size328 x 230 x 125mm
SafetyComplies with IEC EN 61010
Weight2.42kg
  • Socket & See CB40
  • IECP UKA 13A Plug to IEC Female Connector
  • Pair of 4mm Test Leads
  • Calibration Certificate

🚚 Testersmans Shipping Policy

Free Mainland GB Delivery Over £150

We offer free delivery on most mainland Great Britain orders over £150 (ex VAT).
This applies across England, Wales, and most of Scotland, excluding certain remote or offshore postcodes.

If your order total falls just short of £150, or you’re a returning customer, feel free to contact us — we may be able to offer a discount code or delivery workaround.
📞 01945 738112 | ✉️ [email protected]


📦 UK Delivery Options

We work with both Royal Mail and DHL to offer reliable and flexible delivery across the UK:

  • Royal Mail – Best suited for lighter parcels and for customers in remote regions, including the Highlands, Islands, and Northern Ireland.
  • DHL – Ideal for most mainland UK orders, providing fast, tracked delivery and excellent reliability for time-sensitive shipments.

Our checkout system automatically displays the available delivery services for your postcode and order weight, ensuring you always see the most suitable options.

Note: Heavy, bulky, or freight-only orders will be charged separately.
Our website is designed for quick, transactional purchases rather than bulk or palletised orders.
Please contact us in advance for a tailored freight quotation if your order falls into this category.


⏱ Dispatch & Delivery Timing

We aim to dispatch all in-stock orders promptly, but delivery depends on both when you order and which service you select.

  • UK orders: placed by 2:00 PM Monday–Friday are usually dispatched the same day.
  • International orders: placed by 2:00 PM Monday–Thursday are usually dispatched the same day.

Orders placed after these times are processed the next working day. This means delivery may occur the following day or later, depending on the courier and service selected.

Once dispatched, your chosen delivery service determines how quickly your parcel arrives:

  • Standard services We use Royal Mail Tracked 24 or DHL Parcel as our ‘Standard’ services. They are not guaranteed to arrive next working day.
  • Premium services (e.g. Royal Mail Special Delivery or DHL by Noon) offer guaranteed delivery windows.

If your order is time-sensitive, we strongly recommend choosing a guaranteed service or contacting us before ordering to confirm availability.

Please note: For logistical reasons, we may occasionally adjust the delivery method selected at checkout. For example, smaller items may be better suited to letterbox-friendly packaging or may be at greater risk of delay or loss via certain services. We actively monitor courier and postal service disruptions—including strikes and delays—and may modify shipping arrangements to help ensure timely and secure delivery.


📅 Busy Periods & Delays

We always aim to dispatch promptly, but delivery times may be affected by:

  • Seasonal demand (e.g. Christmas, bank holidays, or industry shutdowns)
  • Courier network delays outside our control
  • Supplier lead times or calibration requirements for certain equipment

If your delivery is time-critical, please contact us before ordering so we can confirm stock and courier availability.


🌍 International Shipping

We ship worldwide using UPS Express Saver® and other trusted global courier partners. All international shipments are tracked and generally dispatched Monday to Thursday to ensure smooth customs clearance and transit.

Estimated delivery times:

  • Europe: 1–2 working days
  • North America: 2–3 working days
  • Asia-Pacific & Rest of World: 3–5 working days

Delivery times vary depending on location, customs clearance, and local courier performance.


💰 Taxes, Customs & Import Duties

International customers are responsible for any applicable taxes, customs charges, or import duties.
These are not included in our product or shipping prices.

Your courier will typically provide a secure payment link for any import charges once your parcel reaches customs.
If import fees are refused and the parcel is returned, we will issue a refund minus all incurred shipping and return costs.


📍 Using Your Own Courier

If you would prefer to arrange collection via your own courier (UK or international), please contact us before placing your order to coordinate collection from our Wisbech warehouse.


📝 Important Notes

  • Please ensure your delivery address and contact number are correct at checkout.
  • Undelivered parcels may be returned to us after a short holding period.
  • Redelivery or return fees may apply, even if your order originally qualified for free delivery.
  • By placing an order, you confirm your understanding and acceptance of this policy.

Additional information

Weight2500 g