Easily locating short in cable

What is the easiest way to pinpoint where a T&E cable has been damaged in a wall/ceiling - probably due to rodents!

I understand in larger highways lighting networks they use a thumper and detect the RF emissions to pinpoint the fault.

Is there a similar way that this can be done on a domestic install without very expensive equipment? Perhaps with a signal generator and a small loop antenna attached to a scope?

Parents
  • If you have a MFT (Multi Function Tester) used by the average electrician you could try

    link out the CpC and Line then get your R1 R2

    then use chart on Guidance note 3 or onsite guide for copper resistance and reverse the maths.

    so as an example  if R1 R2 equals 0.07 and you are use 2.5mm2 CSA it give you a value of 19.51 so   0.07 / 19.51 times by 1000 gives you of 3.6 so the calculation would suggest 3.6 meters for the fault.  There are various YouTube tutorials about it.

    Hope this helps

Reply
  • If you have a MFT (Multi Function Tester) used by the average electrician you could try

    link out the CpC and Line then get your R1 R2

    then use chart on Guidance note 3 or onsite guide for copper resistance and reverse the maths.

    so as an example  if R1 R2 equals 0.07 and you are use 2.5mm2 CSA it give you a value of 19.51 so   0.07 / 19.51 times by 1000 gives you of 3.6 so the calculation would suggest 3.6 meters for the fault.  There are various YouTube tutorials about it.

    Hope this helps

Children
No Data