FIRST HOME - Help with new Consumer Unit

[DaniQ]

My partner and I bought our first house a week ago. We don't have much DIY experience but we are determined to learn and do as much work as we can to save cost.

The house is a 3bed an ex-council house built in 1959 and needs a complete refurbishment.

The existing CU is not too old (pvc wires) but we have to add sockets, electric shower...and we prefer to get it upgraded. Please see photos.

I have had an electrician having a look a few hours ago. He said he can move the CU 180 degrees facing the hall with the length of the existing cables. He quoted me £250 for moving the CU, including new CU.

He said he could install the following CU:
http://www.screwfix.com/p/british-g...dual-rcd-consumer-unit/2920g?_requestid=39295

If I replace it I would like to get a good quality one with space for more modules and individual ring per floor for the lights and sockets, 2 sockets outside, an electric shower, induction cooker, oven...

I am thinking something Like:
RCD 1
32A Upstairs Ring Main
6A Upstairs lights
6A Smoke Detector
16A????? Immersion heater - in case the gas boiler fails

RCD 2
32A Kitchen Ring Main
32A Downstairs Ring Main
6A Downstairs Lights
45A Cooker

Do you think I could reuse the RCBOs from my current CU for the new one :
RCBO 1
Electric Shower (9-10kw)

RCBO 2
Outside sockets or kitchen sockets


My questions are:

1. Could you recommend a better Consumer Unit?

2. Would it be to much work and too expensive to split the existing ring socket and lights per floor? Or should just leave as it is?

3. What do you think about using the RCBO for shower and outside or kitchen socket?

4. Could you please arrange the two RCDs in a better way?

5. Do you think the MCD specs are OK (amps)?

6. What do you think about this job for £250?

Thank you very much. We are quite stressed wih the refurbishment and your help would be much appreciated.

 

[Octopus]

Your fuse board can be considered obsolete So replacing it with a new unit is the way forward and it's highly unlikely that any posts from the old unit would fit a new unit.

As for the price, I would say it's on the low side... Considering it should include a full rest of the existing unit , production of the EIC and part p if you are in England or Wales

As for splitting the house into more circuits, this may not be possible without considerable work.

Maybe get another quote.

Edit. I now remember your earlier posts...... So consider all the options, and prices before you start

 

[davesparks]

My advice would be not to have an electric shower, they are inferior to a proper plumbed in shower with a hot and cold water feed, this way you can have thermostatic control and a pumped feed for a good pressure. Electric showers are notoriously unreliable and rarely give good performance.

Plus of course having the biggest electricity supply in the house terminated just above the bath and in the same cheap plastic box as a mains water feed really doesn't sound like a good idea.

 

[Octopus]

Just to add a dual rcd cu with just 5 circuits means you would lose 2 or 3 circuits if a rcd trips.... Ask about RCBO boards...

 

[Richard Burns]

The consumer unit you link to is fine as the circuits stand at the moment, but if you wanted to split up circuits and add circuits then you would want a larger consumer unit.
Any of the main manufacturers consumer units should be OK.
Hager, Wylex, MK, Crabtree, BG, MEM, Schneider, Lewden.

Remember a consumer unit change does not cover modifying or adding any circuits, this is a completely different job.

Changing a circuit that is spread over two floors into two circuits one on each floor would very often mean just rewiring the entire circuit into two circuits from scratch, if you were very lucky with the current wiring layout you might be able to just split the circuit up into two but generally (especially if you are already adding sockets) the rewire of the circuits is the easiest option.
A lighting circuit is often more straightforward to separate out than a socket circuit.

The existing parts that you have are obsolete and reusing them would not be a good idea or particularly cheaper.

Generally a dual RCD consumer unit is split up so that lights and sockets on the same floors are separated, a downstairs ring would be separated from a kitchen ring the boiler and immersion heater would be separated.
These separations are so that if one side fails there is still some electric power on each floor/ a way to heat water, etc. on the other side.
Your proposed split does not do this, ask your electrician for advice on that one, you have also not listed the central heating circuit which you would need.
Using an all RCBO consumer unit would avoid these splitting problems but would cost more to install.

The MCB ratings are standard except a cooker would usually be 32A.

£250 is very cheap for a consumer unit change and relocation.

 

[westward10]

Did you not post a very similar thread a few weeks ago about moving the consumer unit AND service head?

 

[NDG Elecs]

I have stopped using the BG boards due to numerous problems with them over the past year or so. I have gone back to using Hager.

Splitting the RFC and lights is a good idea if possible. But it may not be that easy, and there are unknown aspects about the best way to do it, so it would be hard to price. There may well be two circuits on that lighting MCB so it could be split already without you realising.

RCD protection on showers is a must. I don't know of any manufacturers that will not state that.

Let the spark decide on the individual cct details in relation to current rating.

£250.00 is too cheap in my view.

 

[SJD]

For £250, I'd be very surprised if everything (or even anything) is going to be tested (which it all should be).

 

[DaniQ]

Thank you for all youur answers.

The consumer unit you link to is fine as the circuits stand at the moment, but if you wanted to split up circuits and add circuits then you would want a larger consumer unit.
Any of the main manufacturers consumer units should be OK.
Hager, Wylex, MK, Crabtree, BG, MEM, Schneider, Lewden.

Remember a consumer unit change does not cover modifying or adding any circuits, this is a completely different job.

Changing a circuit that is spread over two floors into two circuits one on each floor would very often mean just rewiring the entire circuit into two circuits from scratch, if you were very lucky with the current wiring layout you might be able to just split the circuit up into two but generally (especially if you are already adding sockets) the rewire of the circuits is the easiest option.
A lighting circuit is often more straightforward to separate out than a socket circuit.

The existing parts that you have are obsolete and reusing them would not be a good idea or particularly cheaper.

Generally a dual RCD consumer unit is split up so that lights and sockets on the same floors are separated, a downstairs ring would be separated from a kitchen ring the boiler and immersion heater would be separated.
These separations are so that if one side fails there is still some electric power on each floor/ a way to heat water, etc. on the other side.
Your proposed split does not do this, ask your electrician for advice on that one, you have also not listed the central heating circuit which you would need.
Using an all RCBO consumer unit would avoid these splitting problems but would cost more to install.

The MCB ratings are standard except a cooker would usually be 32A.

£250 is very cheap for a consumer unit change and relocation.

Could you please explain me what you mean with?

"Using an all RCBO consumer unit would avoid these splitting problems but would cost more to install."

Thank you

 

[DaniQ]

My advice would be not to have an electric shower, they are inferior to a proper plumbed in shower with a hot and cold water feed, this way you can have thermostatic control and a pumped feed for a good pressure. Electric showers are notoriously unreliable and rarely give good performance.

Plus of course having the biggest electricity supply in the house terminated just above the bath and in the same cheap plastic box as a mains water feed really doesn't sound like a good idea.

At the moment I have an old gas boiler with a small immersion tank. Then If I have a bath the next person would have to wait the water to heat. Also If I connect a Pumped Electric Shower to the water tank in the loft that supplies the water to the boiler I could have person having a bath and another having a shower downstairs at the same time. Please correct me if I am wrong.

 

[NDG Elecs]

It means that in the event of a certain type of fault you would only lose the one circuit affected, and not 4-5 circuits that go through one RCD.
RCBO boards are more expensive as the individual RCBOs cost around £25 each. RCBO board costs around £300, whereas a dual RCD board around a £100.

Agree with DS that a shower off the boiler is much better than an electric shower. I have done myself out of work a couple of times recommending this instead of a new shower circuit.

 

[DaniQ]

For £250, I'd be very surprised if everything (or even anything) is going to be tested (which it all should be).

The guy was an electrician in Poland and had to go to college here to get the certificate? I am not fully sure if he can do an official test after... Hopefully he will test everything.

 

[SJD]

If you have a consumer unit changed, it is notifiable to building control. Usually done by the electrician via scheme membership (NICEIC, ELECSA, etc.). There is a good chance your work was not going to be notified, which would be a problem if/when you come to sell and the buyer wants the paperwork. Or in the event of some major problem, like a fire, when this might be requested by the insurer.

 

[westward10]

Your last thread in the same vain ran to over thirty posts with experienced electricians giving their opinion. A few weeks later you come back saying you have found some chancer who is not only going to replace your consumer unit but also relocate it for a mere £250 and now you want more advise, not from me.

 

[The Ghost]

You have stated you are new to this kind of building work and I fear you are going to go over budget and get very stressed about it all. If it aint broke don't fix it. If you are starting from scratch, rewire the whole house and get it the way you want it. Do not go for half measures it will be more expensive in the long run. If you cannot afford to rewire to the spec. get a report on the condition of existing wiring to see what needs to be done. I would not even get out of bed to change a consumer unit for £250.00. Unless you realistically have the money to refurb I suggest you don't go there it will end in tears.

 

[NDG Elecs]

Not even a 2 way garage board Vorti?

 

[DaniQ]

.

 

[DaniQ]

Your last thread in the same vain ran to over thirty posts with experienced electricians giving their opinion. A few weeks later you come back saying you have found some chancer who is not only going to replace your consumer unit but also relocate it for a mere £250 and now you want more advise, not from me.

You have stated you are new to this kind of building work and I fear you are going to go over budget and get very stressed about it all. If it aint broke don't fix it. If you are starting from scratch, rewire the whole house and get it the way you want it. Do not go for half measures it will be more expensive in the long run. If you cannot afford to rewire to the spec. get a report on the condition of existing wiring to see what needs to be done. I would not even get out of bed to change a consumer unit for £250.00. Unless you realistically have the money to refurb I suggest you don't go there it will end in tears.

I appreciate your advise and I will take it on board. To arrange the kitchen how we want we have to turn 180degrees the CU. It is not a full reallocation.

 

[DaniQ]

Following your advises I'm considering to don't go over the top with the electrics and just replace the CU without splitting the rings per floor.

Do you think I could have all the lights in the house on a single MCD ?

Same for the sockets? One MCD for the kitchen, another MCD fo the rest of the house?

Then Do you think this would be ok:

RCD 1
32A Socket Ring Main
6A Smoke Detector
16A Immersion heater - in case the gas boiler fails
40A Electric Shower
16A Outside Sockets

RCD 2
32A Kitchen Ring Main
6A Ring Lights
32A Induction Hob
6A Gas Boiler
32A Separate Oven


Thank you

 

[stevethesparks]

Why are you not asking these questions to your Polish electrician?
£250.00 is far too cheap. I wouldn't swap a CU for that, let alone relocate one.
You get what you pay for, as you are going to find out.

Has your proposed electrician checked the main protective bonding, as well as advising about the poor bonding clamp currently providing your main earthing connection? Has he asked you request a pme terminal be fitted? Has he done any preliminary checks? Will the new CU postion be within 3 metres of the service head when relocated?
Good luck....I'm out.

 

[telectrix]

and, if you are moving the CU, are you also moving the cut-out and meter? if so, then it's a few hundred quid for DNO and/or supplier to do this legally.

 

[Taylortwocities]

Seems our friend is posting this on every electricians' forums known to man.

Better to do this in one place, or you'll get confusing replies because not all the information will get to all of the people who might want to assist you.

Just saying

http://Nope/threads/consumer-unit-does-it-need-to-be-ungraded.190060/#post-1525215

 

[Specialist]

Why are you not asking these questions to your Polish electrician?
£250.00 is far too cheap. I wouldn't swap a CU for that, let alone relocate one.
You get what you pay for, as you are going to find out.

Has your proposed electrician checked the main protective bonding, as well as advising about the poor bonding clamp currently providing your main earthing connection? Has he asked you request a pme terminal be fitted? Has he done any preliminary checks? Will the new CU postion be within 3 metres of the service head when relocated?
Good luck....I'm out.

Think you already know the answer to your questions buddy

 

[LewisM]

Your electrician should be able to answer all these questions but at £250 all in I doubt he can.

 

[Octopus]

Following your advises I'm considering to don't go over the top with the electrics and just replace the CU without splitting the rings per floor.

Do you think I could have all the lights in the house on a single MCD ?

Same for the sockets? One MCD for the kitchen, another MCD fo the rest of the house?

Then Do you think this would be ok:

RCD 1
32A Socket Ring Main
6A Smoke Detector
16A Immersion heater - in case the gas boiler fails
40A Electric Shower
16A Outside Sockets

RCD 2
32A Kitchen Ring Main
6A Ring Lights
32A Induction Hob
6A Gas Boiler
32A Separate Oven


Thank you

If I read this correctly you are adding about 5 circuits, so how much is your cheap polish friend saying he wants ti charge for this too?

What is your budget for your kitchen?

 

[polo1]

I have stopped using the BG boards due to numerous problems with them over the past year or so. I have gone back to using Hager.

Off topic, but what problems have you had?

 

[Andy78]

Off topic, but what problems have you had?

My issues have been:
Cage clamp terminals stripping their threads before tightening
RCDs not meeting times
Flimsy blanks that fall out
Poorly made bars and screws that can also strip easily

 

[Andy78]

To the OP,
All these questions should be directed to your electrician. If you don't have one, get one.
If you feel the need to ask the internet instead of your electrician, then get another electrician that you trust more.

 

[davesparks]

At the moment I have an old gas boiler with a small immersion tank. Then If I have a bath the next person would have to wait the water to heat. Also If I connect a Pumped Electric Shower to the water tank in the loft that supplies the water to the boiler I could have person having a bath and another having a shower downstairs at the same time. Please correct me if I am wrong.

Then you would be much better off having the plumbing sorted with a bigger hot water cylinder, if possible an unvented hot water cylinder will give you mains pressure hot water.
Or a combi boiler may be suitable.

 

[NDG Elecs]

My issues have been:
Cage clamp terminals stripping their threads before tightening
RCDs not meeting times
Flimsy blanks that fall out
Poorly made bars and screws that can also strip easily

So it's not just me then! Exactly the same problems bar the blanks which are binned. Plus the grommet strip is carp too, and their IP65 shower boards are shaped in such a way you can't fit a locknut on them without some butchery. Oh, and also the knockout spot welds are far too firm. My main issue from the above is with the awful cage clamp screws that strip far far too easily, had it happening with two RCDs and a couple of MCBs. They are cheap for a reason.

 

[JK-Electrical]

My issues have been:
Cage clamp terminals stripping their threads before tightening
RCDs not meeting times
Flimsy blanks that fall out
Poorly made bars and screws that can also strip easily

I experienced pretty much the same set of problems with a BG board that I fitted a couple of weeks ago. One of the meter tails kept slipping out of the cage clamp. An RCD was found to be defective. This is the second - and final - time that this has happened to me with a BG board, and some of the screws on the neutral and earth bars were quite stiff to turn. In addition, I had a titanic struggle to get the lid aligned. NEVER again.

 

[Rpa07]

And that's the problem with these cheaper boards that will inevitably be fitted by the chancers, poorly fitted and with little or no testing going against good workmanship from the get go. How many future faults will be incubating by the fitting of these cheap inadequate boards by cheap and inadequate fitters?

 

[DaniQ]

Thank you to everyone for your opinions and ideas.

I removed part of the plasterboard on the wall where the CU has to be fitted. It is a bearing wall with space of 320mm in between the studs, I expected to have a bit of luck and get at least 360mm to get a normal CU but I wasn't lucky this time.The space in between plasterboard is 85mm.

I have been searching for the right size of box but I can''t find any Dual RCD box to fit there with a minimum of 7 MCBs.

I would love to get a Design 10 Flush Consumer Unit by Hager with 10 ways and get the main switch plus 8 RCBOs but we are talking of over £250 and It doesn't give much room for future upgrades.

Also I have seen a Wylex one which I could fit removing the plasterboard on the back and fitting a new solid wood board on the top of the plaster (screwing to the timber, of course) to make the wall 12mm deeper. It shouldn't be to difficult.
Wylex Metal 17th Edition Amendment 3 7W High Integrity + 7 MCBs Consumer Unit - Toolstation - https://www.toolstation.com/shop/Electrical/d190/Wylex+Consumer+Units/sd2615/Wylex+Metal+17th+Edition+Amendment+3+7W+High+Integrity+%2B+7+MCBs+Consumer+Unit/p67344


I could take out an RCD and fit individual RCBOs to get extra space from a "two way" RCD ending with:


11 SPACE
RCD 1
32A Socket Ring Main
6A Smoke Detector and Lights
16A Immersion heater - in case the gas boiler fails
6A Gas Boiler


RCBO
32A Induction Hob
32A Separate Oven
32A Kitchen Ring Main
16A Outside Sockets
40A Electric Shower



What do you think about this idea? Also do you think I could combine any anything to save space in the CU?

Again, Thank you very much for all your help

 

[Octopus]

^^ that board DOES NOT have RCD's it has rcbo's

Read my earlier post - it's obsolete - and needs changing ....

 

[DaniQ]

^^ that board DOES NOT have RCD's it has rcbo's

Read my earlier post - it's obsolete - and needs changing ....

Yes, this is what that post is about, replacing this CU. I'm trying to find the right one to fit in between the timber.

 

[telectrix]

if that stud wall is not load bearing, you could probably get away with chopping a piece out of 1 of the vertical timbers. maybe to 1 where your hand is in pic#1. and reinforce with a couple of noggins.

 

[SJD]

You could take all the plasterboard off, and move one of the studs a few inches, to gain a bit more width.

You could also fit a dual RCD board but remove one of the RCDs and instead fit a few RCBOs and the remaining RCD, that will win you 2 slots.

 

[DaniQ]

if that stud wall is not load bearing, you could probably get away with chopping a piece out of 1 of the vertical timbers. maybe to 1 where your hand is in pic#1.

Is there any easy way to know what type of wall this is?

 

[telectrix]

stud walls are generally not load bearing. load bearing walls are generally masonry and if you look directly above, upstairs, you'll see if there's a wall directly above.

 

[Midwest]

I don't think the Polish electrician even exists, if he does his written English is very good. Better than mine.