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LTW315 Two Wire Non-tripping Loop Tester

The Megger LTW315 Two Wire Non-tripping Loop Tester with an advanced noise detection system makes testing safer & easier!

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Megger LTW315 Two Wire Non-tripping Earth Loop Tester

Megger LTW315 two-wire non-tripping loop tester makes loop impedance testing/results clear and obvious.  Unlike three-wire loop testing it makes it possible should no neutral be present.  With auto-start the LTW315 will calculate and display the PFC and PSCC value at the press of a button up to 20 kA.

Verify the loop impedance of a live electrical circuit, ie without the need to disconnect the electrical supply. The new LTW300 series instruments offer a 2 wire loop testing solution that does not trip 30 mA RCDs and can be used on a wide range of voltages.


Megger LTW315 Key Features:

  • 2 Wire loop impedance measurement
  • No tripping of RCDs
  • Simple connection
  • Automatic test extension on noise detection
  • Greater confidence in loop result
  • 50 V to 440 V operation
  • 110 V centre-tap loop testing
  • CAT IV installation testing
  • AUTO start - operation
  • 0.01 Ω resolution
  • Large clear backlit display
  • IP54 weatherproof case
  • Calibration certificate included 
  • 3 year warranty

The various models of the Megger LTW300s:

  • LTW315 - 2 Wire loop impedance measurement
  • LTW325 - 2 wire + maxZ + (R1+R2)
  • LTW335 - 2 wire + maxZ + (R1+R2) + Download


Comparison Chart for: Megger LTW315 Two Wire Non-tripping Loop Tester

 2Wire Non Tripping Loop Testing 
2Wire Fast Test (High Current)
110V to 280V Applications
50V to 440V Applications
Phase to Phase Testing
20KA PFC Range
40KA PFC Range
0.01Ω Resolution
0.001Ω Resolution
AUTO Noise Detection
AUTO Start Loop Test
Voltage Measurements
Frequency Measurements
Max Zs Display
R2+R2 Display
Backlit Display (White Light)
BuiltIn Front Cover (Foldaway)
IP54 Weatherproof Case
Accepts Rechargeable Batteries
Test Result Storage
Product Downloads


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