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MFT1721 Multifunction Tester

Megger MFT1721 Multifunction Installation Testers offers 2 & 3 wire non-trip loop testing, plus Insulation test at 100 V, 250 V, 500 V & 1000 V. Simple colour coded test selection with large clear backlit display for ease of use.

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1920.00 incl. VAT)
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Megger MFT1721 Multifunction Tester with an Additional 100V Insulation Test Range

The Megger MFT1721 is the most popular of the range of Megger 18th Edition testers!

Designed to test low voltage electrical installations to BS7671, providing all the tests required to complete the necessary electrical certification for industrial, commercial and domestic fixed wiring installations.

It features auto RCD testing and adding phase rotation, 3-phase RCD testing and current measurement (with optional clamp), plus this model adds an additional 100V insulation test range, true RMS voltage measurement, mV sensor input and Type B RCD testing!

Megger MFT1721 Key Features:

  • TRMS System voltage and frequency measurement
  • Insulation test at 100 V, 250 V, 500 V and 1000 V Including input protection against live circuits up to 600 V even when insulation test is locked-on
  • Continuity resistance at 200 mA or 15 mA
  • Automatic start - no need to press TEST so leaving both hands free to hold probes
  • Resistance range up to 100 kΩ with fast continuity buzzer at selectable thresholds
  • Earth loop test
  • 2 and 3 wire non-trip range
  • 2 wire Hi current including phase to phase
  • Prospective fault current measurement up to 20 kA
  • RCD testing including:
    • Type AC, A, S, B and programmable RCDs
    • 3-phase RCDs
    • Auto-test routine
    • Fault (Touch) voltage display

The Megger MFT1721 is supplied in a robust moulded case (as is the MFT1711)
Whereas the MFT1731/MFT1741 tester is supplied in a large soft pouch with additional space for optional extras.

What comes with the Megger MFT1721?

  • Megger MFT1721 Multifunction Tester 
  • 3 wire test lead set with probes and crocodile clips
  • Mains plug test lead
  • Batteries
  • Switched test probe for remote testing
  • Megger embroidered Neck strap
  • Carry case
  • Full user guide CD for MFT 1721
  • Megger calibration certificate


Comparison Chart for: Megger MFT1721 Multifunction Tester

Earth loop impedance ranges
Conventional 3-wire no-trip test L-PE
New algorithm 3-wire no-trip test L-PE
Confidence meter
Tests through 10 mA RCDs
Tests through 30 mA RCDs
2-wire no-trip test L-PE
L-PE 48 V to 280 V, 45 Hz to 65 Hz
2-wire high current test
L-N / L-E 48 V to 280 V, 45 Hz to 65 Hz
L-N / L-E 48 V to 480 V, 45 Hz to 65 Hz
PSCC or PFC calculations displayed with loop impedance
Up to 20 kA fault current
ZMAX value retained
Calculated R1 + R2
Insulation resistance range
250 V, 500 V and 1 kV test voltages
100 V test voltage
Applied voltage display
Adjustable buzzer threshold
Full protection against live circuits
Continuity and resistance range
200 mA test current for certification
15 mA test current to prolong battery life
Auto-start continuity test
Adjustable buzzer threshold
Voltage, frequency and phase rotation range
10 V to 600 V AC and DC
True RMS
Frequency 15 Hz to 400 Hz
Phase rotation
RCD testing range
10, 30, 100, 300, 500 mA RCDs
1000 mA RCDs
1/2 I, I and 5 I tests
0° and 180° phase angle
High speed auto RCD test
Ramp test for RCD fault finding
Type A, type AC and type S RCDs
Programmable RCDs
Type B (pure DC) RCDs
3-phase (no earth) RCDs
Touch voltage display 0 V to 253V
Earth electrode resistance range
Stakeless or clamp on testing**
3-wire testing for fall of potential or 62% rule
Attached rod technique 3-pole testing
Option of 25 V and 50 V output
Ground noise check
Intelligent safety system
Test inhibit
Safe contact
Live safety warning
Auto discharge
Additional benefits
Analogue arc
Probe incorporating test button
Current measurement 0.1 mA to 200 A*
On-board recharging
On-board memory
Bluetooth downloading from memory or blobbing
Hard plastic carry case
Large soft carry case
Weather and dust proof to IP54
Safety rated to CAT IV 300 V
Calibration certificate
1 year warranty, upgradeable to 3 years
Notes:**Requires optional MCC1010 and MVC1010*Requires optional MCC1010
Product Downloads




Megger Mega to use!

Having been a user of Fluke testers in the past I found the Megger a lot more user friendly with some good features such as no trip Zs recordings, phase rotation, RCD ramp tests. Very easy to go through results on the screen and the battery life is longer than Fluke and it's also rechargeable.

Only downside would be if the soft case was slightly more robust or came with a hard case that was similar to Fluke where you have ample room for small hand tools and doubled up as a seat.

All in all, will use megger MFT in future for sure.