cu change

[martinsayer81]

quick question

if i was changing an old fuse board to a new c/u, and i was installing 3 new circuits,
would i have to fully test all the old wiring before connecting it all up?

and what if the old wiring keeps tripping the new rcd?

how would you guys go about it??

 

[malcolmsanford]

I assume DNG that regulation 631.1 and the part about "changes to an existing installation" in regards to issuing an EIC, does not apply to a CU change ...........

 

[Des 56]

Quick answer is yes all circuits should be tested. With this job two certificates would be produced (if required) "arguments will ensue" one an electrical installation cert ( through the EICR docs.) for the three new ciruits, and a periodic electrical cert (again through the EICR docs.) for the changing of the CU. It must be stressed that the changing of a consumer unit is a change in an existing installation and should never be covered under an electrical installation cert. which is for NEW installations only. Then with regards to possible old wiring tripping, then fault finding will have to be carried out. viz. unplug all appliances and megger between live and neutral to earth of all circuits. Ensure that the main neutral is disconnected from system, either by the double pole main isolator, or by disconnecting from main neutral connection.

DNG
Documentation doesn't appear to be your strong point :smile5:

 

[Nik_lamb]

Can't go wrong with a BG in my opinion nice and cheap! (big factor for me as I'm self employed) Also everyone stocks them so the local wholesaler to the job your on is bound to have one in stock. And pretty easy to install to be fair! Sawing the bus bar is a bit annoying tho lolThink the mini spirt level inside is a bit funny. Never know when you might forget your spirit level I spose lol

 

[telectrix]

i have 3 local wholesalers who refuse to stock BG. because B&Q are selling the CUs for less than the wholesalers can buy from BG.

 

[Nik_lamb]

Just done my 2391 and CU would of course need a EIC, EICR if your were to periodically test and inspect the installation prior to any fuse board being changed.

 

[axel132132]

I was going to mention bonding but i hit the link and its all in there

I think you should have a good read of this thread.​

**CU Changes And YOU**

If you take the time to browse the forum "stickies" (The top section of posts at each part of the forum) you will be surprised at what you can learn.

Read more: http://www.electriciansforums.net/e...ical-forum/58899-cu-change.html#ixzz1y9vtFk9s​

 

[Nik_lamb]

Telectrix, there crazy! I work all over London so have to use a few wholesales and they all do a 12 way board and a variety of breakers at very reasonable price.

 

[telectrix]

i have to admit , i like the BG boards. i have 1 wholesaler that stocks the boards and MCBs, but he's 30 miles away. there is nowhere around here stocks them. ( bear in mind, here there are only CEF, elec. ctr. and eddies )

 

[Steve_P]

changing of a consumer unit is a change in an existing installation and should never be covered under an electrical installation cert. which is for NEW installations only​

sorry mate, thats rubbish. an EIC is necessaryt for a CU change. what else would you use?

​

For belt and braces, there's nothing stopping you using an EIC instead of a minor works. Ok, a little over kill but no reason why not, apart from the time implication of course.

 

[Octopus]

For belt and braces, there's nothing stopping you using an EIC instead of a minor works. Ok, a little over kill but no reason why not, apart from the time implication of course.

Minor works for a CU change?

 

[Richard Burns]

For belt and braces, there's nothing stopping you using an EIC instead of a minor works. Ok, a little over kill but no reason why not, apart from the time implication of course.

That would be a lot of paperwork with one minor works certificate for each circuit altered, but I suppose you could do that if you really wanted, I prefer the EIC much quicker and you have done most of the testing beforehand.

 

[Tonkatoy27]

Quick answer is yes all circuits should be tested. With this job two certificates would be produced (if required) "arguments will ensue" one an electrical installation cert ( through the EICR docs.) for the three new ciruits, and a periodic electrical cert (again through the EICR docs.) for the changing of the CU. It must be stressed that the changing of a consumer unit is a change in an existing installation and should never be covered under an electrical installation cert. which is for NEW installations only. Then with regards to possible old wiring tripping, then fault finding will have to be carried out. viz. unplug all appliances and megger between live and neutral to earth of all circuits. Ensure that the main neutral is disconnected from system, either by the double pole main isolator, or by disconnecting from main neutral connection.

For NEW circuits only? Is that why there is a new/addition/alteration tick box option?

I think you are misinformed sir........

 

[Djlelectrical]

Yes its completely necessary when changing the CU, And doubly so as a provision for a new circuit is going in..
Electrical Installation Certificate
Schedule of Test results
Schedule of Inspections

JOB DONE..