Pre tests on new circuit

[BigSpark]

If i were to install a new circuit in an existing cu asuming all the calcs are ok and the board will handle said amps for new circuit ,what test am i required to do pre install. Am i right in sayin polarity of main incommers ,ze and pfc would be all im required to do or would i attempt to look for faults on existing circuits as these may affect my new install and possibly trip if im installing say an rcd or rcbo where none was present before. If i am required then to what extent do i test, just irt or go for full r1 r2, (r1 rn, end to end )and zs on all circuits in cu. Any help appreciated thanks BigSpark

 

[Andy78]

You need to think about the nature of the addition, the extent of the certificate you will be providing, and the requirements of BS7671 regarding ensuring the existing equipment to be used is suitable for the addition. All will become clear.

 

[Octopus]

And the icing on the cake it's notifiable under Part P too

 

[BigSpark]

Thanks for the help ive had a look into it and i realise that what i am adding to has to be fit for purpose but say the whole board was protected by a single rcd and i was adding a shower to this . Amperage was fine for the board, would i have to test the existing circuits on the rcd or would i assume they are ok as rcd is not tripping and go down route of ze, pfc, earth leakage test . just a bit unsure

 

[Andy78]

Like I said, the extent of the certificate will be limited to the work you do.

 

[Midwest]

Your testing the new circuit, you are installing. However, reg 132.16 applies (e.g. earthing & bonding), but testing is not required to the other circuits you are not working on.

Test the new circuit as per the regs, complete an EIC, with just your new circuit and noting other circuits not worked on.

PS as Murdoch says, it's notifiable in a domestic property.

 

[BigSpark]

Thanks very much for the help. So as long as the rcd and bonding are up to scratch really all ive got to worry about is how the tests are after ive installed my new circuit and of course notify lbc as its a new circuit

 

[Pat H]

If you aren't registered to do notifiable work I believe you are required to notify your lbc before work commences so they can inform you of what checks if any they will require. They may require a 3rd party to check the work and that maybe expensive. Using somebody who is registered with a scheme is often more cost effective.

 

[Midwest]

Thanks very much for the help. So as long as the rcd and bonding are up to scratch really all ive got to worry about is how the tests are after ive installed my new circuit and of course notify lbc as its a new circuit

You might want to test the RCD before you start, saves the old chestnut 'It was ok, before you messed around with it!'. And the 'division of circuits police', might have a say on adding to an install with the one RCD.

PS Ask your scheme re my last.

 

[Octopus]

If you aren't registered to do notifiable work I believe you are required to notify your lbc before work commences so they can inform you of what checks if any they will require. They may require a 3rd party to check the work and that maybe expensive. Using somebody who is registered with a scheme is often more cost effective.

As Stroma only charge £288 per year it's probably best to join then than rely on some 3rd party to test - assuming you can find somebody.

 

[Midwest]

As Stroma only charge £288 per year it's probably best to join then than rely on some 3rd party to test - assuming you can find somebody.

Somebody from Stroma

 

[BigSpark]

Yes thanks for the help i will notify in accordance with part p . while ive got you here , do you know if a new wylex mcb will fit one of nb boards or are tbey not compatible. thanks BigSpark

 

[Andy78]

Yes thanks for the help i will notify in accordance with part p . while ive got you here , do you know if a new wylex mcb will fit one of nb boards or are tbey not compatible. thanks BigSpark

Which method of notification will you be using ?

 

[HandySparks]

Which method of notification will you be using ?

The OP lists his occupation as NICEIC Approved Contractor.

 

[BigSpark]

Like handy sparks said the company i work for is registerd with nic eic so will use them for notification. any ideas on the wylex board

 

[Pete999]

Somebody from Stroma

No somebody to carry out 3rd Party testing

 

[Midwest]

No somebody to carry out 3rd Party testing

Napit or Stroma are the only ones signed up.