Earth Loop Testers
Loop impedance testers, or loop testers, verify the loop impedance of a live electrical circuit without disconnecting from the electrical supply. Most testers include non-tripping RCD technology as standard to prevent unexpected outages.
Find out more about Earth Loop Testers below.

- Identifies polarity faults
- Easy to Use
- Mains powered (no batteries required)

- Kit comes with loop tester, fused leads, carry case and more
- Earth loop, wiring configuration and other measurements
- LED indicators

- Loop No Trip L-E, Loop High-Current L-E and High-Resolution L-E/ L-N test sequences
- Calculate PFC and PSC
- Cycle through and view L-N, L-E and N-E AC voltages

- High current high resolution (0.001Ω)
- Polarity and voltage present warning LEDs
- Lightweight, compact design with a magnetic hanger for hands free operation

- Easy method of evaluating loop status
- 20, 200 and 2000Ω measurement ranges
- CAT III 300V safety rated

- 2 wire non-tripping loop test
- 50 V to 440 V operation
- 110 V centre-tap loop testing

- 2 wire earth loop tester
- Portable, lightweight design with built-in carrying case
- Guaranteed not to trip RCDs

- Easily test high current loops
- Supplied with fused leads and clips
- Suitable for use on both single and 3-phase equipment

- Built-in memory
- Two-wire system for accurate analysis of single or three phase
- Designed not to trip RCDs

- 2 Wire Non-tripping loop tester
- 50 V to 440 V operation
- 110 V centre-tap loop testing

- Performs RCD trip time, RCD ramp current and automated RCD testing
- Line resistance testing for 3 phase systems
- Non-trip RCD testing

- AC voltage measurement in range 0…440 V
- Frequency measurement 45.0...65.0 Hz
- Rechargeable battery

- Wide operating voltage range ensures suitability for measuring an array of networks
- Measure fault loop impedance to a resolution of 0.01Ω
- Save up to 990 readings which can be download via a USB interface

- Remote control
- Operates voltages up to 900 V AC
- Measurement of very low short circuit loop impedances

- Impedance of phases and neutral conductors up to the 10th harmonic
- Automatically switches between measurement points
- 1kA test current

- Measure the grid impedance of LV grid systems
- Multi-phase measurements with automatic test point switching
- Memory storage and transfer to PC
About Earth Loop Testers
Measuring the earth loop is vital for maintaining both the efficiency of electrical systems and for reducing the risk of electrical fires/shocks taking place due to a short circuit caused by incorrect earthing of a system.
Without regular loop testing, the overall integrity of an electrical system could be compromised. Electricians need to have the tools necessary to carry out earth fault loop impedance testing, as an incorrectly installed loop could be the difference between a safe system and a dangerous one. Earth loop testers are designed to find the exact path of earth loop impedance through a system, allowing users to determine whether the path taken by the impedance is sufficient enough to trip a protective measure installed upon that electrical system before problems arise.
The basic rule for earth loop testers is that the lower the loop impedance, the greater the overall fault current is, and the more quickly the circuit is disconnected during a fault. It is therefore important that users utilise earth loop testers to determine the fault current value and the overall path of the loop, ensuring that the protective measure trips out the circuit quickly and efficiently.
Tester.co.uk offers a wide range of earth loop testers, including Chauvin Arnoux loop testing equipment, Kewtech earth testers, Martindale loop testers, Megger earth loop testers, Metrel earth loop testers, and Socket and See digital loop testers. Our products comply with the latest 18th-edition rules and regulations and come from some of the world's top suppliers of earth loop testers.