|Kiloki||Forum||DIY||Electrical||Electric Shower, Cable/Rating.|
Electric Shower, Cable/Rating.
I want to upgrade my electric shower and whilst doing so get a more powerful one.
Currenty have a 8.5kw, cable (6mm I believe) is not trunked goes from main board, under floor, through airing cupboard into loft connecting to pull cord, i'd estimate in all around 12-15m absoloute max, then a metre in the loft from pull cord into plastered wall for 1 metre to shower.
My question is can I go to 9.5kw or dare I say 10.5kw?
View related: Circuit rating2012-10-30 20:10:57I currently have a 7.2 kW electric shower fed by 6mm twin and earth via a 30A breaker. The shower needs to be replaced but the lowest rating shower available now is 8.5kW which equates to around 35A. As 6mm cable is rated at 40A, would I be ok just uprating the MCB to a 40A unit to supply an 8.5kW shower?...
Fuse Rating for Electric Shower.2012-01-18 00:21:16Hi...
I have a 7kw triton electric shower which i am going to replace as it has developed a fault, the current fuse rating is 30amp.
I am replacing the 7kw shower with a new Triton seville 7.5kw shower, i understand the fuse rating will now be 32amp, my question is this... would it be safe to use the 30amp fuse... ? and if not, i notice that physically the size of the 32amp fuse is bigger... so presumably i would need a new consumer fuse holder?? any help with this would be much appreciated. cheers....
What Kw shower can I use??2013-02-27 12:47:30Hi, I'm doing up my ensuite bathroom and in my wisdom chucked out the old electric shower before checking the kw rating on it. How can I tell which kw rated shower I can use? Had a look at the fuse box but cant see a rating on it. Any help really appreciated....
cable for shower pump2011-11-25 22:47:16Hi, a bit of advice please - I am installing a new shower pump, rating 450W, 2.0 amps - would 3 amp mains cable be good enough for this - I know it should in theory but I am not sure of the tolerances. thanks.
Also, fitted an electric shower last year 10mm cable - checked by local P reg electrician. The ceiling switch broke recently & I had to replace it. Am I supposed to call him back again to recheck it? thanks....
electric shower replacement2011-11-17 00:17:22I intend to replace my existing electric shower ( 8.5kw ) with another of the same rating. The present installation uses 6mm cable running 8 metres. The cable is protected by a 32amp MCB.
As I am simply changing the shower unit only, will this installation still meet all regs?
If it is inadvisable to keep this installation will the following be correct for an 8.5kw shower.
8 metres of 10mm cable protected by a 40amp RCBO at the CU ( main switch 100A ) Wired to a wall mounted 45amp DP Switch located outside of the bathroom.
I know that a new installation will need to be done by a qualified sparky but I need to at least route the cable and do other prep work beforehand....
installing shower and extractor2011-11-20 14:08:09im putting a new electric shower in my sisters bathroom. at present they have an electric shower in there with a pull switch with neon indicator but no extraction. in my house i have electric shower and extractor and a switch outside room with red switch that controls the shower and the extractor. i want to do the same for my sister.do away with the pull cord and have it the same as mine. the showers rating is staying the same and its moving into another corner closer to the pullcord. i just need to know how to do the wiring from the feed into the existing pullcord onwards. thanks...
Heatstore Multi-flow 12kw instead of shower2011-11-25 13:28:31Looking to replace an electric shower with a 12kw multi-flow instantaneous water heater from Heatstore. I've removed the old electric shower and all the wiring (cable far too small - needs 10mm2) and MCB from the consumer unit and was looking to procure all the parts required for the Heatstore.
The consumer unit I have is a MEM unit from the 80s and seems to only accept MCBs with a max rating of 45Amps (if I were to buy a second hand one from ebay as you cant get new ones to fit).
So I figure that the best thing to do would be to install one of these separate shower consumer units with built in RCD and a MCB rated to 50Amp (as per the MCB rating specified in the Heatstore installation manual). All of the 50Amp MCBs seem to be rated to 11Kw (MK units) or 11.5Kw (Wylex Units) max rating though, and I need 12kw.
Can anyone recommend a good brand of unit that will suit? or will this make much difference?
There is a crabtree unit in screwfix (starbreaker shower kit) but the spec they give you on their website is pretty basic and crabtrees own website is dung also. Looks not too bad for ?41?...
RCD and CU for electric 10.8w shower2011-11-27 17:58:17I'm gathering the bits for a 10.8 kw electric shower installation, which, when I've got everything, I'm then going to ask a part P registered electrician to connect.
So far, I've run the 10mm cable from the consumer unit to the shower room, and will be finding an isolation switch for outside the room, and an RCD
The CU main switch is rated at 65A, and is recent (within the last 8 years or so) as is the wiring of the house. I'm confident in the general quality of the house electrics.
Am I right to assume that the 'trip switches' in the CU are MCB's and I just need to ensure that there is a 45A MCB available within the CU?
I'm looking for a cheap RCD for the shower and am wondering if a 63A RCD would be appropriate or do I need to go for a 45A?
(My thinking is that as long as the cut out rating is low enough, say 30mA, then the current rating needs to be at least high enough, but doesn't matter if it's too high?)
thanks for your help
electric requirements for shower2011-11-09 19:18:33Hi I am about to have an 8.5kw electric shower installed and hired an electrician to do all the electric work before calling the plumber.
The problem is the wire used from the main consumer unit is the correct cable which is 10mm and it is connected to an isolation switch but the cable from the islotaion switch leading to the shower he used a 2.5mm cable.
I read online that for an 8.5kw shower a 6mm cable must be used. Would the 2.5mm cable cover my shower warranty or do I need that to be changed to a 6mm....
6mm cable rating2011-11-29 22:56:58hi can i use 40 amp fuse on wiring for 8kw shower, (cable lenght 3metres)
the existing cable is 6mm.
what is the rating of 6m cable ????cheers...
Another shower cable query!2011-11-30 07:47:47Hi,
I need to replace an electric shower, currently 8.4kw, (35 amp fuse, old fuse box, no RCD). Have read some other posts re 6 and 10mm cables, but I'm not sure what my size / rating my cable is.
The existing cable is c. 15 years old T&E, no markings on exposed part of the cable by the fuse box, but cable clips are marked '14 x 7', the 14mm ties in with the width of the external insulation of the cable. Cable appears to be in good condition, never had any problems with the shower in that time (until it sprung a leak!). It's only a short wiring run, c. 1.5 m. exposed up wall (under the stairs) and 3.5m. in floor void / lath & plaster wall void (bathroom is at top of stairs).
Can anyone identify the cable and tell me what power shower I might be able to upgrade to?
Thanking you in anticipation!...
Essentials 9.5kW Electric Shower - Fuse Rating2011-11-15 23:53:27Folks,
I'm new to the site and obviously wouldn't be here if i didn't have a problem which i'm hoping someone might be able to provide an answer to.
I've been living in my house now for about 4 weeks and in the bathroom i've got a Essentials 9.5kW electric shower which has blown the fuse on the main ciruit board
At present it was a 30A fuse and i think replacing it with a 30A fuse is not going to be sufficient. What fuse rating do i need to be looking at? 40..45A?
I've no idea how long the shower has been in the house and i can't find anything on the web that looks like the model i have.
Any suggestions? I'm not any form of electrician so have no idea and was just scouting around for answers before i look about calling in a professional
Shower circuit2011-11-14 08:29:27People,
My house has been signed off to 16th edition around a year and a half ago.
The CU has an RCD protected MCB marked 'SHOWER'. This feeds an existing electric shower in the bathroom.
There is a dedicated feed run from the CU to a junction box in the loft in 6 sq mm (or similar size I cannot recall). There is then a run in from the junction box in the loft to the electric shower in the bathroom in the same size cable.
The electric shower is soon to be removed as part of a bathroom revamp. I am installing a Stuart Truner pump in the airing cupboard as a presurising system to a mixer shower valve in the bathroom (which requires no electric power).
As a homeowner, am I permittted to:-
1. Remove the existing electric shower from the bathroom wall and remove the cable that runs from the electric shower to the junction box that is in the loft??
2. Can I replace the existing junction box in the loft with a Fused Connection unit with a suitable fuse rating for the shower pump and then make a new run of 2.5 sq mm to the shower which is to be installed in the airing cupboard.
This proposal will mean the existing MCB marked 'SHOWER' will be protecting a run of 6mm to the Fused Connection Unit, then I will have a Fused Connection Unit with small fuse protecting a run of 2.5mm to the new shower pump.
If I cannot do the above as a homeowner how can I decomission the existing shower circuit?
remove electric shower2011-12-01 16:47:15Hi all,
I have replaced my electric shower with a bath/shower mixer tap. I have disconnected the water supply from the electric shower. Is it safe/sufficient to now remove just the cable from the ceiling switch to the shower heater unit, and then remove the shower from the wall? That is, leave the wiring in place from the CU to the shower (but switched off at the CU obviously). I assume that an electrician would remove the shower connection at all points, but as I am not an electrician I don't really want to have a go at the CU...
Thanks in advance,
HELP ELECTRIC SHOWER2012-07-31 18:16:14Can anyone help me out. I have zero electric knowledge so please explain anything in real simple terms.
I'm having my shower replaced, I currently have a 8.5kw electric shower.
I’m looking for a new electric shower, and have seen one, we really like and brilliant price but it’s a 9.5kw
What I need to know can a 9.5kw run from a 6mm cable and would my RCD fuse which is 80a 30ma, be ok, or do I have to stick with the 8.5kw.
Any help would be greatly appreciated.
Running a Cable 250 meters to a Shower block2011-11-24 18:07:51I have to run two cables from the house. Both cables are 250 meters in length. One is going to supply a shower block with two showers and has 4 electric heaters. The other is to a caravan for lighting only. Could somebody help with what rating of cable i should purchase.
Regards from a new member...
Shower Cable Confusion2011-11-26 03:37:37I know this question has been asked a thousand times before (for which I appologise) but once more can't hurt can it?
I want to replace an electric shower in my bathroom.
The current unit is an Aqualisa Aquastyle I but it gives no clue as to the power rating.
The house is of modern construction, though is now about 10 years old and I'm guessing the shower is that old.
Before purchasing the new unit I've been up in the loft and found the pull switch for the existing shower. There's 6mm cable coming up the breeze block wall from the consumer unit (presumably) to the switch and then 6mm cable going from the switch back to the unit. Except the cable lengths from the wall to the switch and back the cable is between the breeze block wall and plasterboard.
So reading the back of the boxes in Homebase (and the other posts on this site) it suggests that 6mm cable is only good for showers upto 7.2kw - and I don't seem to be able to buy one of those.
Nearly all the showers I see (online and in shops) are 8.5/9.5/10.5kw.
I've chosen the shower I'd like, which is 8.5kw - but I'm not going through the hassle of upgrading the main feed from the consumer unit to 10mm cable. (I forgot to say the shower circuit is on it's own breaker in the unit).
Q1, Have the regs changed with regards to this, or have showers just increased their power consumption over the last ten years?
Q2, Are there any circumstances under which I can run a 8.5kw shower on my existing 6mm circuit?
Q3, Can you still buy a shower with a 7.2kw (or less) power rating, where from and is it worth it?
Many thanks, much appreciated.
Changing my shower2011-11-19 00:28:53my shower has burnt out, i have bought another shower, the same rating, 10Kw, The cable is 10mm. Am i ok to just change them over, or with the current regulations and it being a bathroom do i have to get a certified installer to do the job?...
Correct MCB rating?2011-11-28 01:31:53I came across an interesting one the other day.
It was a faulty Triton shower rated at 9.5KW.
However the MCB for it in the consumer unit was rated at 32amps. (Definitely the shower one as when switched off the power to the shower was off.)
Now if you take 9500watts and divide by 240 volts you would get 39.58 amps (of course the rating should be even higher if you work on 230Volts)
So how was the shower working on a 32 amp MCB?...
What size electric shower2011-11-23 07:28:39Hello all,
I have a question that I hope someone will give me an answer to
At the moment I have a paltry 8.5kw electric shower and flow is really poor. I have a 10mm cable going to the shower, what is the maximum kw shower I can have installed?