Also have a chat with your spark doing the re-wire and make sure he runs a 10mm cable to the shower and not a 6mm, any shower over a 8 - 8.5KW needs a 10mm feed to it or you are asking for trouble, i'm sure he will put a 10mm cable in but its worth checking...chuck
Electric shower?
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Triton have a 2 year in house warranty. They need seperate water (off/on) valve and 40amp break switch. These are handy for Triton repair man who will probably never need to call.Comment
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thats it mira been trying to think of that name, another top quality make like triton, and as chucklor said make sure of the 10mm cable, my sparky fitted it, and i think on to a seperate trip. so stick to mira or triton and u wont go wrong, and a reputable sparky.support mountain resue
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Yes its better to use a seperate 100ma RCD for a electric shower..using the 30ma RCD that protects the whole house can suffer from nuisance tripping from the electric shower.....This is another good reason to use a mixer shower. All these add extra costs to the electrical installation really makes the job very expensive indeed.Comment
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cost me all together ?245 for 10.5 triton and installation not dear i think. my sparky also cross bonded the bathroom because it wasnt done, so i got good value for my beer tokens, also that shows he was a good sparkyYes its better to use a seperate 100ma RCD for a electric shower..using the 30ma RCD that protects the whole house can suffer from nuisance tripping from the electric shower.....This is another good reason to use a mixer shower. All these add extra costs to the electrical installation really makes the job very expensive indeed.Last edited by gmb45; 29 May, 2010, 20:54.support mountain resue
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sparky did the lot m8 apart from getting the shower, leccy plumbing supplied the pipes, cable, rcd, even the ceiling cord switch, yeh full install, sparky charged me ?150support mountain resue
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But if he is having his house re wired the spark will fit a dual RCD board, as long as the breaker size is 40A or 50A for the according shower size then there should be no problems, the only time I will put a shower on a seperate shower RCD unit is when the house does not have a RCD protected consumer or when the total amperage of the whole installation is close to the main DP rating ie 63A,80A or 100A.....chuckLast edited by chucklor; 29 May, 2010, 23:11.Comment
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Well you as well do it the way you say, sound a good idea because i have just done a 17th edition update, and we were told that lighting circuits are now RCD protected...So thats a big change from the 16th edition, where split load boards were introduced to solve that problem...so basically we go back to the 15th edition where the whole house is now protected with 1 RCD...Unless, like you say...a split load board is used and the shower is on a 100ma RCD and the rest of the house is protected by a 30ma RCD...sounds logical to me
But either way you can only normally pull 80A on a single phase supply around this area....so splitting the load because of the size of the main DP switch makes no difference if the max alllowed incoming current is limited to 80ALast edited by ITS A SCAM !; 29 May, 2010, 23:29.Comment
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Nearly all 17th editions boards are split load, one of the main reasons is to split the circuits lighting and sockets upstairs and downstairs so you have power or lights on opposed RCD's in the event of tripping, and so you can introduce switches and sockets into various zones in bathrooms.A 30mA RCD or a 40A-50A /30mA RCBO is quite sufficient for a shower, splitting the load has nothing to do with the amount of current you draw...chuckLast edited by chucklor; 30 May, 2010, 04:03.Comment
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Any way "Its a Scam" from one pro to another I think sometimes the introduction these edition, radials and rings RCD this and that, zones here and there keep us debating until we are blue in the face, I know some old sparks that have forgotten more than I know but just because they do not want to take the relevant edition are thrown on the scrap heap, on the other hand there is part "P" where someone can take a four week course and can sign my test results because I failed the theory part of 2391, the whole country has gone mad!! we may clash a little in opinions but we both know what we are doing and that the difference, best regards...chuckComment
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The reason why so many sparks have different interpretations is because of the regulations are constantly changing...I left college with the 15th Edition regulations, where there was one RCD or ELCB covering the whole installation. Then the 16th Edition was introduced, this gave us the option NOT to have the lights protected by a RDC ( by this time ELCB's had been removed from use ) so everyone fitted split load boards so if the power tripped because of a faulty appliance, the lighting stayed on ( this was most suited for the night time when you could still see what was going on because your light had not gone off as well as the sockets ) But now we have the 17th Edition, and i am yet to meet a sparky who does it how we were shown by the lecturer. Tha main changes are that the lighting has to be RCD protected, and yes it possible to use a split load board for this purpose. Are you aware that you can now have a socket in your bathroom ? Because thats also a addition to the 17th edition ( and a bloody stupid one as well ). We were told that its best to use RCBO's on all circuits, and to have no main RCB, but to have just one main double pole switch controlling the whole board ! so you buy a empty board for ?20, then a 80A double pole switch for ?5........Then you fill the board with as many RCBO's as you need for each circuit. This quickly mounts up, and at about ?25 each the 17th edition mains board can cost ?300 in just parts. We was also told of the possible intention for every single socket to have its own RCBO and to be fed individually from the mains board, this would mean that a mains board would be in excess of 30 "ways" in size and to have about 25 RCBO's fitted ! This is just stupid in my opinion, and will make the cost of a rewire double in price. Can you imagine a huge mains board in a house ? And its got to be easily accessable in the event of a mains failure. No longer can it be situated in a little box hidden away somewhere. The future for a sparky who works for himself is not looking good, personally i work for a multi Billion pound company, so i have no worries about finding the work, thats done by the engneers. I refuse to do jobs for family & friends, because the job requires so much investment in materials, and the customer cannot see why the job costs so much...i feel horrible giving them the bill, knowing its a lot more than they thought...Comment

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