0.06 meg Ohm could it be a load

[Tetris1985]

Would a load register as something like 0.06 Meg ohm on a circuit between N - E ( something like an unfused spur with the fuse removed? or is it just wishful thinking

 

[westward10]

I think you need to elaborate as how you have achieved this reading and the purpose of the test.

 

[Tetris1985]

I think you need to elaborate as how you have achieved this reading and the purpose of the test

Purpose is curiosity of my own electrical installation, and why i would have almost a dead short on N-E but with no RCD tripping unless it was a load

My flat has a circuit in it that tests as follows when live cpc and neutral are disconnected from the CU @ 250 volts

ZS 0.45

L-E >200 megohm
L-N >200 megohm
E-N 0.006 megohm

 

[westward10]

0.06 Meg ohm (6000 ohm) is not a dead short.

 

[Risteard]

0.06 Meg ohm (6000 ohm) is not a dead short.

Just a correction - that should be 60,000 Ohms.

 

[littlespark]

If it’s just the circuit you’re testing, N-E should be clear. Any load, even a neon light, would be between L-N

What is on this circuit?
Is everything unplugged if it’s sockets?
Is the polarity correct at each point on the circuit?
What are the readings at other points on the circuit?

 

[westward10]

Just a correction - that should be 60,000 Ohms.

Oops you are quite correct.

 

[timhoward]

If it's a radial circuit e.g. cooker/shower/maybe immersion then have you tried turning the isolator off near the load?
I'm having a stab in the dark that this is a heating element.

 

[pc1966]

I have seen this with an old RCD socket - it had something like 50k to E as a means to trip out in the event that neutral is open or swapped.

But it could be some faulty cable of course, which is more worrying. You need to see if any loads were still connected during the test as there was only SP isolation on them.

 

[Rockingit]

60KΩ isn't going to be a design load for an appliance, do the maths and that's an Ib of 3.8mA which is daft. It could though be a Neon?

 

[timhoward]

60KΩ isn't going to be a design load for an appliance, do the maths and that's an Ib of 3.8mA which is daft. It could though be a Neon?

agreed, I was wondering if it was a element deteriorating N to E as 3.8ma leakage seemed plausible.
I should be patient and wait and see what the circuit is!

 

[oscar21]

Whenever I come across a reading like this, almost but not quite a dead short on the megger it usually turns out to be a surge protection extension lead plugged in somehwere.