testing

[new boy21]

Hi lads trying to get my head around testing, on insulation resistance testing does a reading of

500 meg and below need to be rewired

 

[acat]

BRB 612.3.2 page 158 selv and pelv 0.5Meg 1meg are the minimums acceptable for the rest


Chris

 

[BigSteve]

BRB 612.3.2 page 158 selv and pelv 0.5Meg 1meg are the minimums acceptable for the rest


Chris

abosolutly correct

 

[m4tty]

But under 2meg ohm needs investigation or think nic say under 5meg ohm needs investigating but over 1meg ohm is a pass cheers

 

[james b]

Under 2 m ohm to 1 m ohm is a latton defect an needs re checking 1 m ohm is to low anything over is a good reading.

 

[Deleted member 9648]

Despite what the NIC says tracking down and rectifying 'low' readings of 1meg plus is very difficult. It is not always viable to trace and improve readings as high as this,in practice only much lower readings are likely to be a practical proposition to trace......IMHO attempting to improve readings of 1meg plus is pointless....and anything approaching 2megs??...well despite what the NIC may suggest i'ts a waste of valuable time.....5megs???? give me strength.
I realise the increasing use of RCD's makes high IR readings desirable but you can go too far.

Edit....talking existing installations here.....a new installation would expect readings way above the minimum.