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Description
MAJ MT312RCD ELCB Loop & Polarity Tester, Voltage Indication: 25V~264VAC, RCD Test Voltage: 230VAC, Freq: 50 60Hz, Trip Current Setting: 10mA, 20mA , 30mA, NCV: Bar Graph Display & Buzzer Alert, 136x75x31mm RCD ELCB Loop & Polarity Tester Overview The MT312 is a compact, versatile tester designed for 3 wire AC circuits, supporting ELCB RCD testing, loop impedance measurement, and polarity verification. It features a Non Contact Voltage (NCV) function for safe
RCD/ ELCB Loop & Polarity Tester, Voltage Indication:25V~264VAC, RCD Test Voltage:230VAC, Freq:50/60Hz, Trip Current Setting:10mA, 20mA , 30mA, NCV:Bar Graph Display & Buzzer Alert, 136x75x31mm
RCD/ ELCB Loop & Polarity Tester
Overview
The MT312 is a compact, versatile tester designed for 3-wire AC circuits, supporting ELCB/RCD testing, loop impedance measurement, and polarity verification. It features a Non-Contact Voltage (NCV) function for safe AC voltage detection and displays wiring status clearly on a large, easy-to-read LCD screen. Voltage measurements between Live and Neutral, as well as Neutral and Earth, are shown directly on the display. The MT312 automatically performs loop impedance testing to verify correct wiring, with intuitive LED indicators: Green for Good, Orange for Check Circuit, and Red for Urgent Check, highlighting any potential faults. During ELCB/RCD testing, the device measures fault trip times up to 99.9ms, with a 10-second buzzer alert confirming a successful trip. A key feature of the MT312 is its interchangeable leads, enabling testing of standard power outlets with the included test leads or distribution boards using the optional MT350L test lead set.
Features
- Compact, versatile tester for 3-wire AC circuits
- Performs ELCB/RCD testing, loop impedance measurement, and polarity verification
- Non-Contact Voltage (NCV) function for safe AC voltage detection
- Clear LED & LCD display for wiring status and voltage readings
- Measures voltage between Live-Neutral and Neutral-Earth directly on the display
- Fault Trip Time: 99.9ms max, with 10-second buzzer alert on ELCB trip
- Automatic loop impedance testing to verify correct wiring
- Interchangeable leads - Perform measurements at a socket or distribution board (MT350L Optional lead for distribution boards)
- LED indicators for wiring status:
- Green – Good (Resistance < 1.8Ω)
- Orange – Check (Resistance between 1.8Ω & 92Ω)
- Red – Urgent Check (Resistance > 92Ω)
Specifications
|
Function |
Range |
|
Voltage Indication |
25V to 264V AC |
|
RCD Test Voltage |
230V AC |
|
Frequency |
50/60Hz |
|
Trip Current Setting |
10mA, 20mA, 30mA |
|
Fault Trip Time |
99.9ms max. Buzzer alert for 10 seconds when ELCB trips |
|
Loop Impedance Wiring Indication |
Green – Good (Resistance <1.8Ω)
Orange – Check (Resistance Between 1.8Ω & 92Ω)
Red - Urgent Check (Resistance >92Ω) |
|
NCV |
Bar graph display & Buzzer alert |
|
Auto Power Off |
5 Minutes (Approx) |
|
Display |
LED & LCD |
|
Batteries |
2x AAA |
|
Dimensions |
136 x 75 x 31mm |
|
Weight |
185g |
Downloads
Additional Information
| Device | Tester |
| Type | RCD/ ELCB | Loop & Polarity |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.5 ★★★★★
Based on 12 reviews
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Product Reviews
★★★★★ 4
Not a terrible toy
Color: Blue Cow
Not a terrible product, but for a super sure it doesn’t last very long. It’s cute, but this is meant for definitely a small two small medium dog.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 13, 2026
★★★★★ 5
Dog toy
Color: Red Lobster
My puppie loves it
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 2, 2026
★★★★★ 5
Quality material.
Size: Large
Puppy/Dogs like. Not chewed up yet, and looks to be very sturdy. I like purchasing my puppy/dogs rope like toys. And this one is good.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 8, 2026
★★★★★ 4
Francie Isn't Interested
Size: Large
Cute, colorful and appears well made. I can't comment on how well it holds up to heavy chewing as my Jackshund (Francie) doesn't seem interested in it...possibly because it does not have a squeaker... It is a good size, not soft and squishy but harder (rope), which is why I purchased it, hoping it would last longer than some other dog toys that Francie has ripped apart. I may pass it on to two large granddogs.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 1, 2026
★★★★★ 5
Durable
Size: Large
Purchased this for a destructive cat. So far its held up to the chewing and raking.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 27, 2025
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