Introducing the MT310 — Major Tech’s Compact Socket & ELCB Tester Setting a New Standard


When safety, reliability, and ease-of-use matter, every electrician and installation specialist knows: a robust tester is indispensable. Major Tech now brings Australia the MT310 Socket / ELCB Tester, designed for fast, accurate on-site verification of socket wiring, polarity, and earth leakage devices.

What Is the MT310?

The MT310 (also called the Socket ELCB Tester) is a compact, lightweight instrument that evaluates 3-wire AC power outlets in the range 216 V to 264 V, and tests Earth Leakage Circuit Breakers (ELCBs).

Key built-in features include:

  • Voltage readout via LCD (150 V to 245 VAC ±10 %)
  • Selectable test currents - from 10 mA up to 35 mA - to gauge tripping behaviour
  • Polarity / wiring indication via bright neon lights that clearly indicate correct or incorrect wiring (identifies 5 different faults)
  • Separate test button, making it easy to initiate the leakage test when desired
  • Rugged IP40 double-injection rubber housing for durability in field use
  • Safety ratings of CAT IV 300 V and CAT III 600 V

Simply plug the MT310 into a wall socket use neon lamps to verify that no faults are present, choose a test current, press the test button, and read results instantly - no wiring disassembly required.

 

Why the MT310 Matters in Australia’s Electrical Landscape

1. Safety & Compliance

Earth leakage protection and correct socket wiring are foundational to Australian electrical safety standards. The MT310 enables electricians and inspectors to verify that outlets are not only properly wired, but also correctly and safely respond to leakage currents.

2. Accurate, On-the-Spot Diagnosis

With fault indication voltage measurement and trip current testing built-in, the MT310 lets technicians diagnose issues immediately - whether it’s a miswired outlet, nonfunctional ELCB, or marginal voltage levels.

3. Versatility in Testing

Because the tester supports multiple current settings (10 mA through 35 mA), it can help identify both high-sensitivity and standard tripping behaviours - valuable in sites with existing protective devices or older wiring systems.

4. Rugged & Portable

At just 130 g and compact dimensions (130 × 69 × 32 mm), the MT310 is light enough for daily use, yet its durable housing stands up to job-site wear and tear.

5. Clear Visual Feedback

Rather than cryptic error codes, the combination of neon indicators and the LCD readout provides clear, intuitive feedback - reducing guesswork and speeding up fault resolution.

6. Powered by circuit under test

The MT310 is powered by the circuit under test, bypassing the need for costly and wasteful batteries. 

Typical Applications

The MT310 is ideal for:

  • Routine safety inspections in residential, commercial, or industrial buildings
  • Commissioning of new outlets and verifying correct wiring
  • Maintenance checks on circuits protected by ELCBs/RCDs
  • Electrical audits, refurbishment projects, or site compliance checks

Specs & Purchase Info

Some key specifications:

Feature

Specification

Voltage measurement

150 – 245 VAC ±10 %

Test currents

10 / 15 / 20 / 25 / 30 / 35 mA ±1.75 mA at 230 VAC

Safety rating

CAT III 600 V / CAT IV 300 V

Weight

130 g

Dimensions

130 × 69 × 32 mm

Safety Standard

IEC 61010 / EN 61010

IEC 61557-7 / EN 61557-7

For electricians, inspectors, and electrical contractors in Australia, the MT310 Socket / ELCB Tester offers a smart balance of safety, simplicity, and functionality. It’s a tool built to demystify wiring faults, streamline testing workflows, and ensure compliance with critical safety standards.