Megger DET14C Digital Earth Clamp Resistance Tester
Megger DET14C Digital Earth Clamp Resistance Tester - Image 2
Megger DET14C Digital Earth Clamp Resistance Tester - Image 3
Megger DET14C Digital Earth Clamp Resistance Tester - Image 4

Megger DET14C Digital Earth Clamp Resistance Tester

Megger

£1,199.00 / £1,438.80 incl VAT

The Megger DET14C is a professional clamp-on earth resistance tester designed for fast, safe testing of grounding systems without disconnecting the earth conductor. Measuring both earth resistance and true RMS leakage current, it is ideal for electrical contractors, maintenance engineers, substations, telecoms, lightning protection systems and industrial installations.

Free Mainland GB Delivery on orders over £150 Fast Dispatch from our UK Warehouse Price Match Available on Many Products Need Advice? Call 01945 738112
Add Full 12 Month Calibration Certificate?
SKU: MEG-DET14C Category: Brand:

Description

Megger DET14C Digital Earth Clamp Resistance Tester

The Megger DET14C is a high-performance clamp-on earth resistance tester that enables electricians and engineers to measure earth resistance quickly and safely without disconnecting the grounding system. Using clamp-on technology, the DET14C injects a test signal around the earth conductor and measures resistance in multi-ground installations, significantly reducing testing time while maintaining safety.

Designed for demanding industrial environments, the DET14C features an innovative elliptical clamp head, providing improved access to earth cables, bonding conductors and earth tapes where space is limited. The clamp accommodates conductors up to 37 mm diameter and earth tapes up to 50 mm wide, making it ideal for substations, power stations, telecommunications sites, commercial buildings and lightning protection systems.

Unlike traditional earth clamp testers that use interlocking teeth, the DET14C incorporates flat jaw technology, reducing dirt build-up and helping maintain long-term measurement accuracy with minimal maintenance. An integrated filter also improves measurement stability in electrically noisy environments.

In addition to measuring earth resistance from 0.05 Ω to 1500 Ω, the DET14C also measures true RMS AC leakage current from 0.5 mA to 35 A, allowing engineers to safely identify unwanted current flowing through grounding conductors before disconnecting them.

For improved productivity, the DET14C stores up to 256 test results, each with a date and time stamp for later review directly on the instrument. The bright backlit display, automatic ranging, high and low alarm settings and automatic self-calibration make operation straightforward even in challenging environments.

Built to CAT IV 600 V safety standards, the DET14C is suitable for use throughout commercial and industrial electrical installations where dependable earth resistance testing is essential.

Key Features

  • Clamp-on earth resistance testing with no disconnection required
  • Measures earth resistance from 0.05 Ω to 1500 Ω
  • Measures True RMS AC leakage current from 0.5 mA to 35 A
  • Elliptical clamp head for improved access in confined spaces
  • Accepts cables up to 37 mm diameter and earth tapes up to 50 mm
  • Flat jaw design reduces contamination and improves long-term accuracy
  • Built-in noise filter for improved readings in electrically noisy environments
  • Stores up to 256 test results
  • Automatic self-calibration and auto-ranging
  • High and low alarm functions
  • Backlit LCD display
  • CAT IV 600 V safety rating
  • Supplied with carrying case, wrist strap and calibration check

Watch the Megger DET14C in Action

Typical Applications

The Megger DET14C is ideal for:

  • Electrical installation testing
  • Industrial maintenance
  • Power stations
  • Electrical substations
  • Telecommunications sites
  • Lightning protection systems
  • Commercial buildings
  • Data centres
  • Earthing system inspections
  • Ground loop continuity testing

Specifications

SpecificationValue
Earth Resistance Range0.05 Ω – 1500 Ω
Leakage Current Range0.5 mA – 35 A True RMS
Maximum Jaw Opening39 mm
Maximum Conductor Size37 mm cable / 50 mm earth tape
DisplayBacklit LCD
Data Storage256 readings
Power Supply4 × AA batteries
Safety RatingCAT IV 600 V
Weight985 g

What’s Included

  • Megger DET14C Earth Clamp Tester
  • Carrying Case
  • Wrist Strap
  • Calibration Check
  • 4 × AA Batteries
  • User Documentation

DET14C-DET24C_DS_en

🚚 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.

You may also like…