Martindale EZ150 Socket Tester with Earth Loop Impedance

Martindale EZ150 Socket Tester with Earth Loop Impedance

By Martindale · Model: EZ150 · Electrical & Lighting

Professional socket tester detecting 31 fault conditions with non-trip earth loop impedance testing and T-Safe technology.

  • Detects 31 different socket fault conditions
  • Earth loop impedance measurement up to 500 ohms
  • T-Safe non-trip technology prevents RCD tripping during testing
  • LED traffic light indication for instant pass/fail
  • Identifies faults other socket testers cannot detect
  • Compact plug-in design — no leads required
Check Price on Amazon

Overview

The Martindale EZ150 was the first socket tester to include earth loop impedance measurement, and it remains the benchmark for UK electricians. Its T-Safe technology ensures that RCDs will not trip during the loop impedance check — a common frustration with cheaper testers that cut power to entire circuits during testing.

In-Depth Look

The Martindale EZ150 is the socket tester that serious electricians carry alongside their multifunction tester. It provides a fast first-look at socket condition without the setup time of a full loop impedance test.

31 Fault Conditions

Where basic socket testers check for three or four common wiring faults, the EZ150 detects 31 different conditions. This includes reversed polarity, missing earth, high earth impedance, and several fault combinations that cheaper testers simply cannot identify.

T-Safe Non-Trip

The T-Safe technology is the EZ150’s standout feature for working electricians. When performing the earth loop impedance check, the test current is kept below the trip threshold of RCDs, meaning you can test sockets on RCD-protected circuits without cutting power to the entire circuit. For electricians working in occupied homes and offices, this is invaluable.

Verdict

The Martindale EZ150 is the professional socket tester that goes beyond basic pass/fail. Its 31-fault detection, earth loop impedance measurement, and T-Safe non-trip technology make it an essential tool for electricians who need quick, reliable socket checks without the disruption of tripped RCDs.

Specifications
Fault Detection31 conditions
Earth Loop ImpedanceUp to 500Ω
Non-Trip TechnologyT-Safe
IndicationLED traffic light system
Voltage Range220-250V AC
PowerPowered from socket under test
StandardsBS 1363

Who It's For

  • Electricians carrying out visual inspections and quick socket checks
  • Electrical inspectors performing EICR pre-checks
  • Landlords and property managers verifying socket safety between tenancies

Pros & Cons

Pros

  • 31 fault conditions detected — far more than basic socket testers
  • T-Safe non-trip technology avoids disrupting circuits during testing
  • Earth loop impedance gives meaningful safety data beyond simple pass/fail
  • No batteries required — powered from the socket under test

Cons

  • Higher price than basic 3-LED socket testers
  • Not a substitute for full EICR testing with a multifunction tester
  • LED indication requires reference to the included chart for some faults
Check Price on Amazon
Affiliate Disclosure: This page may contain affiliate links. If you purchase a product through one of these links, we may receive a small commission at no additional cost to you. This helps support our research and keeps this site running. Full disclosure.

Related Products