Major Tech RCD/ELCB, Loop & Polarity Tester – MT312

Streamline safety verification and electrical installation testing with the Major Tech RCD/ELCB, Loop & Polarity Tester (MT312). Designed for electricians, electrical inspectors, and maintenance technicians, this compact, handheld instrument performs reliable ELCB/RCD trip testing, loop impedance verification, and polarity checks on 3-wire AC circuits. Featuring clear LCD voltage readouts, Non-Contact Voltage (NCV) detection, and color-coded LED wiring status indicators, it ensures quick and accurate safety compliance checks.

Key Features:

• 3-in-1 Electrical Testing: Performs ELCB/RCD trip testing, loop impedance measurement, and wiring polarity verification.

• Dual Voltage Display: Simultaneously displays Live-Neutral (L-N) and Neutral-Earth (N-E) voltages directly on the clear LCD screen.

• Visual LED Status Indicators:

  • Green (Good): Resistance < 1.8\Omega

  • Orange (Check): Resistance between 1.8\Omega and 92\Omega

  • Red (Urgent Check): Resistance > 92\Omega

• Non-Contact Voltage Detection: Built-in NCV function allows safe detection of live AC voltages without direct circuit contact.

• Precision Trip Testing: Measures fault trip times up to 99.9ms max, featuring a 10-second buzzer alert upon ELCB trip.

• Versatile Lead Options: Accommodates interchangeable leads for testing directly at wall sockets or at distribution boards (MT350L optional DB lead available separately).

Detailed Description:

The Major Tech MT312 provides quick and effective testing for standard 3-wire AC circuits in residential, commercial, and industrial installations. Its automatic loop impedance testing evaluates wiring integrity and earthing safety, displaying immediate visual feedback via color-coded LEDs.

Equipped with an intuitive keypad, backlit screen, and durable rubber holster, the MT312 allows technicians to perform rapid fault identification both at wall outlets and distribution boards.

Technical Specifications

Note: FREE Delivery does not apply, please make arrangements prior to collecting in store.

Shipping: Allow For 1 - 3 Business Days Before Shipping.