Low insulation reading

[Octopus]

No spin this was an individual circuit.

Then you have an easier job to do then .........

How many socket circuits in the property?

I was doing a CU change recently and when I tested the "immersion" circuit I got a similarly low reading .................. I found an RCD spur that a plumber had added for a shower pump ................ removed the RCD spur and the readings went over 30 mohms

 

[Octopus]

Thats it thou isnt it, customers gonna say well im not sure about that, and im thinkng well it is what it is. Customer needs an extra socket in the loft ready for the cctv guy whos installing Thursday.

Matey ......... this is the real world - if you don't outline potential issues you won't learn ................

 

[buzzlightyear]

I had a similar problem few months back did a ir reading low ohms
found a Arial booster where some T88T had hid it under the cosy rap
right in the corner of a loft .

 

[haptism]

Then you have an easier job to do then .........

How many socket circuits in the property?

I was doing a CU change recently and when I tested the "immersion" circuit I got a similarly low reading .................. I found an RCD spur that a plumber had added for a shower pump ................ removed the RCD spur and the readings went over 30 mohms

More searching required then it looks like, before surgery.

 

[buzzlightyear]

More searching required then it looks like, before surgery.

big craw bar is needed then .

 

[Octopus]

More searching required then it looks like, before surgery.

Absolutely ........

how many socket circuits?

 

[haptism]

Matey ......... this is the real world - if you don't outline potential issues you won't learn ................

Yep Ive always got time for a cup of tea

 

[haptism]

Absolutely ........

how many socket circuits?

Er 3 I think, but its only 1 that im concerned about atm

 

[buzzlightyear]

may be a mouse chewed through the cable .

 

[Octopus]

Er 3 I think, but its only 1 that im concerned about atm

So your next step is clearly identify ALL the sockets on each of the circuits, then go hunting for additional connections ............. alarms, TV amplifiers, RCD sockets, RCD spurs, floodlights....................

tedious but has to be done

And if you can't find any extra connections then you need to split the circuit to try and find where the low reading is...

 

[Deleted member 26818]

Unfortunately, you will have to identify every accessory and their circuits, if only to eliminate them from the circuit you are working on.
You may also have to check lights, as sometimes people feed lights from power circuits, especially outside flood lights or inside wall lights.

 

[littlespark]

Old house?
Squeaky floorboards?
Have someone step on the squeaks while you are testing. If your reading fluctuates, you’ve got a nailed cable.

Could be a squashed cable behind a socket? Live nicked against screw?

Time consuming, but got to be done.

And if all else fails, CCTV supplied from lighting circuit

 

[Deleted member 26818]

Yeah, look out for squeaky sockets.

 

[haptism]

Yes will have to find it, looking forward to it now after all that.

 

[buzzlightyear]

Yes will have to find it, looking forward to it now after all tha

keep us posted .on a stamp to father xmas .north pole .

 

[haptism]

And if all else fails, CCTV supplied from lighting circuit

The lighting is a right old state, tbh the whole house needs rewiring ker-ching

 

[Wilko]

Hi - did you say the boiler is still connected? I've seen the boiler pumps lose IR before, just saying.

 

[Wilko]

Hi - did you say the boiler is still connected? I've seen the boiler pumps lose IR before, just saying.

 

[Wilko]

Hi - did you say the boiler is still connected? I've seen the boiler pumps lose IR before, just saying.

 

[Wilko]

Hi - did you say the boiler is still connected? I've seen the boiler pumps lose IR before, just saying.