My first EICR - A little help with coding required!!

[HappyHippyDad]

Not cautious, I'd say thorough.

How big was the house/how many circuits?

It was a large house.. 4 floors with 5 bedrooms.

Only 6 circuits in total.. 2 rings, 2 lighting, water heater and smoke alarms.

I'm always going to be thorough Murdoch, cant help it can you :smiley2:. That 0.01Mohm on the L-N is going to bug me unless I find it!!! :annoyed:

 

[Octopus]

It was a large house.. 4 floors with 5 bedrooms.

Only 6 circuits in total.. 2 rings, 2 lighting, water heater and smoke alarms.

I'm always going to be thorough Murdoch, cant help it can you :smiley2:. That 0.01Mohm on the L-N is going to bug me unless I find it!!! :annoyed:

That has got to be something plugged in!

 

[Guest55]

no. 5 0.01 Mohm for ins res is a C2 , dont just assume its a neon or connected load , you need to prove it either way.

 

[Silly Sausage]

no. 5 0.01 Mohm for ins res is a C2 , dont just assume its a neon or connected load , you need to prove it either way.

The job's a Periodic, IR L to N is not required.

 

[Richard Burns]

Sounds like a good and thorough, not drive by, EICR, good work.
10,000 ohms is a slightly odd one as it seems too low for even modern neons, though many are now LED as well, I would normally expect 100,000 ohms+, however for a normal load 10,000 ohms is too high. I would expect some electronics connected somewhere, transformers, aerial boosters, etc.
As it stands it should be a C2 with a further investigation, since you have measured and recorded it. But as Archy says it would pass if it had not been measured!

I would agree with the rest of the Marvo coding, with a caveat on the inspector assessing the socket by the sink for environmental suitability, which it sounds like you have done and it is suitable, so no code.

 

[HappyHippyDad]

Sounds like a good and thorough, not drive by, EICR, good work.
10,000 ohms is a slightly odd one as it seems too low for even modern neons, though many are now LED as well, I would normally expect 100,000 ohms+, however for a normal load 10,000 ohms is too high. I would expect some electronics connected somewhere, transformers, aerial boosters, etc.
As it stands it should be a C2 with a further investigation, since you have measured and recorded it. But as Archy says it would pass if it had not been measured!

I would agree with the rest of the Marvo coding, with a caveat on the inspector assessing the socket by the sink for environmental suitability, which it sounds like you have done and it is suitable, so no code.

Thanks for the encouragement Richard , I'll be returning to the house to carry out the required work anyway, so will spend some time hunting down the 10,000 ohms.

 

[HappyHippyDad]

The job's a Periodic, IR L to N is not required.

Could you explain more Archy?

As part of the EICR I have to complete Form 4 (schedule of test results) so its in black and white that I have a IR of 0.01Mohm.

 

[Silly Sausage]

H, I'll answer tomorrow, can't be bothered at the moment!

 

[spark 68]

Hi HHD,

On an EICR, it makes sense to just do a L+N to E IR test, otherwise you run the risk of damaging something electronic that may still inadvertently be connected, eg. burglar alarms, combi-boiler panels, aerial amplifiers and neon's on switches etc., furthermore I usually do a soft test @ 250V first,as this will show if anything is still connected.

Another reason for testing this way is to save you taking lamps out an disconnecting everything wired across L+N.

On an initial verification newbuild etc. then you would obviously do a full IR test on the wiring before sensitive equipment is connected.

On the SoTR there are two columns live/live and live/earth, I just fill in the live/earth one in when testing this way (put a dash or line in the L/L column/row).

On smallish installations (normal domestic) it is easier and quicker to do a global IR test on the whole lot in one go, only splitting the circuits up if you get a lower than expected reading, this is where experience kicks in to see what you would normally expect.

 

[thebigcheese]

On smallish installations (normal domestic) it is easier and quicker to do a global IR test on the whole lot in one go, only splitting the circuits up if you get a lower than expected

Howdy, EICR newbie too... how do you record this on the test sheet?

 

[spark 68]

Tin hat on here lol

Say my global test comes in at 10 Megohms, I usually fill each box as >10 meg, as the circuits are in parallel then none of them will be lower, and all will be almost certainly higher than this.

Don't forget that this is only on an EICR where the circuits are already being used powered up.

Ps, don't forget to operate any two-way switches as well when doing this test,and record the lowest (worst) reading.

Edit: I also make a note on the cert that a global IR test was done L+ N to E

Edit ii) if it is much lower than this then I start to check individual circuits one at a time, still L+N to E at first, and more intensive testing/investigation if there is a problem.

 

[thebigcheese]

Ahh ok that seems rather obvious! Thanks
I'm sure you thought your 1500th post would be more interesting!

 

[spark 68]

check my editing ^^^

 

[spark 68]

The more EICRs you do, you sort of get used to expected readings depending how many and what type of circuits there are, the age and type of wiring etc. physical conditions as well.

You normally get a feel for what is what fairly early on at the visual stage, ie. if there is evidence of DIY disasters, bodges, loads of additions, or even the age of the installation, you sort of develop a sixth "spidey" sense lol