cu change and existing circuits

[Johno]

i didn't mean that at as cowboy reference, i just love RCBOs

 

[jase]

just change the CU,with existing circuits as long as they test out ok and put on the install cert recomendations for the work of spliting circuits it would be just as cheap to put in a 8 way board with main switch and the 4 rcbo's this would leave 4 spare ways for the future wiring and as every cicuit is rdc protected it complys with regs, the 17th allows for the fact that a lot of installations are wired to 16th and as long as they conform to the 16th i.e. EEBADS, it is fine to keep them like that as long as any new work conforms to 17th.

so you reckon this is ok?i cant see anything wrong with it, the reason i ask it that i am going to change my CU in my house for my assesment, at the mo there is a 5way board with a 63A 30mA rcd main switch 1 ring, 1 lighting circuit, 1 shower circuit, if i change the board put in a normal main switch and use rcbo's then if the ring trips we wont lose the lights, and if the lights trip we still have lights from table lights etc whereas at the mo the whole board trips if any of the ciruits fault.
the new arrangement using rcbo's would comply with chapter 31 of the regs

 

[GT1]

doing a CU change next week which will be assessment for NIC.
only 4 circuits existing, and impossible (without major works to the house) to split upstairs and downstairs lights and sockets. Its quite a small house and limitations explained to client. RCBOs to be fitted and thus avoiding every circuit going off in the event off a fault.

 

[tuckermot]

Hi all

why create work by splitting lights and sockets if i was doing a periodic report it would not fail because of this so why worry now


Rich

 

[damo16v]

hi all,

thanks for so many great replies to my questions.

i agree with the fact that to do the change exactly as the 17th ed state would cause me a lot of hassle.

the rcbo route is defo the easiest and may opt for that and just hope the assessor doesnt think i have taken that route because i'm lacking knowledge or lazy!

the main earth needs upgrading to 16mm and the bonding to 10mm so this will give me a bit to do as i think the incoming water is at the rear of the property and the cu at the front and its a terrace house!

i completed my 2330 about a year ago and have 17th ed but i was trying to find a trainee job for a long while but i had no joy, so i have decided to get part p and start off doing work at eves and weekends so i can ease myself into it and keep my day job.

thanks again! i know where to come if i need anymore help.

damian

 

[jase]

let us know how your assesment goes!!!