New CU does it have to be RCD protected?

[SLIPSHOD & SLAPDASH]

I have read the post, still find it hard to see how you can drill through 1/3 of it, unless your really unlucky and hit the back panel

What if it was full of cheese ?

 

[kme]

Then you`d need a Gromit, (sic) I suppose...........

:coat

 

[PC Electrics]

You have contradicted yourself here. In this case the RCD tripped due to the elements insulation breaking down after 5 years, not due to their design of current going down to earth. The problem is cheap Chinese cr4p, not RCD'sEdit, It is known though, that electric oven elements can be hygroscopic, but are fine after the first heat up. I was told to connect to a non rcd supply for half an hour if problematic

Yep ! ccc every time.

 

[Fracticus]

Replacing distribution boards/CUs requires Initial Verification and completion of any defects prior to issueing certificate.

Re RCDs reliable/unreliable - RCDs parameters can change with age hence periodic testing through the ranges required, they have their place.

 

[Sidewinder]

Fracticus,

Not all defects must be rectified when changing a CU, only those for the work you indicate on your cert, and those glaringly obvious or dangerous.

There is "formal" guidance on this from the ESC.

RCD parameters do not change with time, most are now solid state devices, it is the mechanical part that gives issues.

There is a research paper on this, I have struggled to locate it definitively.

However, I remember the gist of the document which was that the failure increases were directly related to the failure of the mechanical segment of the device.

This is normally caused by contamination and thus seizing / stiction of the mechanics.

This can be prevented by the 3 monthly testing routine, which is rarely done!

 

[PC Electrics]

Replacing distribution boards/CUs requires Initial Verification and completion of any defects prior to issueing certificate.Re RCDs reliable/unreliable - RCDs parameters can change with age hence periodic testing through the ranges required, they have their place.

Not so. See here (guide 6):

Best practice guides : Electrical Safety Council

 

[Fracticus]

When replacing distribution boards or CUs then do an Initial Verification, this will keep you right, Any defects should be brought to the attention of the client, certificate can not be issued until remedial works are completed.

---------- Post Auto-Merged at 13:04 ---------- Previous post was made at 11:51 ----------

When replacing distribution boards/CUs you need to do an Initial Verification. Any defects need to be brought to the attention of the client for remedial action. This will keep you right. The certificate cant be issued until repairs are completed.

 

[ianmacd]

You have said that 3 times now. Doesn't make it any more true.

 

[Fracticus]

When replacing distribution boards/CUs you will need to an "Initial Verification" and based on what you find advise the client of any remedial works required. and you dont issue the cert until compliance is achieved.

---------- Post Auto-Merged at 13:18 ---------- Previous post was made at 13:17 ----------

Sorry did not get visibility or the 1st 2, theme is the same

 

[ianmacd]

There is no requirement to do an "Initial Verification". Anything that is not dangerous and is not fixed should be noted on the EIC. EIC only covers work stated on it so can be issued at any time.

 

[Sidewinder]

Your EIC only covers YOUR work, thus you cannot fill in an EIC for existing work.

Thus the EIC should be issued on completion of the CU change detailing the CU change and the work YOU have undertaken in the extents box.