Not sure if it's what you were suggesting, but red/black cable doesn't necessarily mean it's that old - It was still the standard into the first few years of the 21st century.
Can cable share the same notch as copper central heating pipes?
- Thread starter tombodge
- Start date
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Clearly not, or you would already have known about the issues of cables up against CH pipes.
The thing is, rewiring a house, installing new CUs etc is not a trivial job, and I can assure you that it involves knowing far more than you think it does.
Asking questions here can be a useful part of a learning process, but they are not a substitute for proper structured studying. The key term there is "learning process" - you cannot learn all the things you need to know just by asking questions here. It isn't structured enough - it won't provide you with a way to progress where each step builds on what you learned before.
You can't carry out a job of this magnitude by asking whatever random questions happen to occur to you. You've already shown that you have some dodgy misconceptions - what if you get something wrong because you have no idea your knowledge is wrong? What if you miss something because you simply have no idea it even exists, and just don't realise you don't know it?
You told them that you were rewiring a house yourself, and they were happy with that? What did you tell them would be the way you would ensure compliance with Part P?
It beggars belief that you don't see how essential it is to know enough before you start.and once I have finished I will know enough
Clearly not, or you would already have known about the issues of cables up against CH pipes.
The thing is, rewiring a house, installing new CUs etc is not a trivial job, and I can assure you that it involves knowing far more than you think it does.
Asking questions here can be a useful part of a learning process, but they are not a substitute for proper structured studying. The key term there is "learning process" - you cannot learn all the things you need to know just by asking questions here. It isn't structured enough - it won't provide you with a way to progress where each step builds on what you learned before.
You can't carry out a job of this magnitude by asking whatever random questions happen to occur to you. You've already shown that you have some dodgy misconceptions - what if you get something wrong because you have no idea your knowledge is wrong? What if you miss something because you simply have no idea it even exists, and just don't realise you don't know it?
You told them that you were rewiring a house yourself, and they were happy with that? What did you tell them would be the way you would ensure compliance with Part P?
It beggars belief that you don't see how essential it is to know enough before you start.and once I have finished I will know enough
Ive got to the point of running my cables which im doing now so I looked into where im aloud to wire them. Safe zones in the walls. Safe zones in the floors. Where im aloud notch and drill holes. Ive got to a point where the original cables where run in the same notchs as copper pipes and thought there's no way that's aloud so I dug deeper and Ive got my answer. All my back boxes are installed in places there aloud to be install. Light switchs, Cables are all in safe zones.
All of the ceilings are down downstairs. All the cables are visable in the loft. Everything is accessible. All the cables are still visible in the walls (unplastered)
Building control basically said if I get an electrician to go over it before it gets covered up (plastered) and before it goes live. And they do the final hook up test it pass it and sign it off then there happy. Ive spoken to at least 4 sparks in person that are happy todo it not one has had a problem with it. And the last 2 i asked said it was ok to finish my plastering.
I can't understand why your so offend by it?
Clearly not, or you would already have known about the issues of cables up against CH pipes.
The thing is, rewiring a house, installing new CUs etc is not a trivial job, and I can assure you that it involves knowing far more than you think it does.
Asking questions here can be a useful part of a learning process, but they are not a substitute for proper structured studying. The key term there is "learning process" - you cannot learn all the things you need to know just by asking questions here. It isn't structured enough - it won't provide you with a way to progress where each step builds on what you learned before.
You can't carry out a job of this magnitude by asking whatever random questions happen to occur to you. You've already shown that you have some dodgy misconceptions - what if you get something wrong because you have no idea your knowledge is wrong? What if you miss something because you simply have no idea it even exists, and just don't realise you don't know it?
Non of it is live and its all getting checked over buy a qualified electrician. Its only a small 2 bed with everything left on show
You told them that you were rewiring a house yourself, and they were happy with that? What did you tell them would be the way you would ensure compliance with Part P?
It beggars belief that you don't see how essential it is to know enough before you start.and once I have finished I will know enough
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I totally expect another flaming but I might as well risk it. Whats considered a mechanical protection if i decide to keep with the notch's? What thickness of metal
And are they defiantly needed if Im using RCBOs for every circuit?
And are they defiantly needed if Im using RCBOs for every circuit?
3mm thick steel plates, and yes they are always required regardless of whether the circuits are RCD protected or not.
I went to a job a good few years ago. The cables were in notches with no mechanical protection. The customer was so incredibly lucky not to have had a fire. This is what I found.
Not only did it burn a huge hole in the cable surrounded by the flammable joist, floorboard and lath and plaster ceiling, it also almost set the fuse box on fire.
These might seem like trivial things to you, but I assure you, if they're done wrong they can have truly devastating consequences.
I went to a job a good few years ago. The cables were in notches with no mechanical protection. The customer was so incredibly lucky not to have had a fire. This is what I found.
Not only did it burn a huge hole in the cable surrounded by the flammable joist, floorboard and lath and plaster ceiling, it also almost set the fuse box on fire.
These might seem like trivial things to you, but I assure you, if they're done wrong they can have truly devastating consequences.
Girls aloud or allowed grrr
Hmm, is that one of those non-flammable metal fuseboards?
If you're going to buy a book then get the On Site Guide.
http://electrical.theiet.org/books/amendment-no3/on-site-17th-ed-amd3.cfm
It's got all you need to know, the BS7671 itself has a load of stuff you don't need to know and it's not a good read.
All you need to know about putting cables in notches is that you shouldn't.
So - according to you, at that point you already knew what you needed to know so far.
Which means that according to you you had already done the design.
Which means that according to you you already knew all about using ambient temperature de-rating factors when choosing cable sizes.
Which means that according to you you already knew that 2.5mm² would be inadequate for a ring final once the temperature got to about 48°.
Which means that according to you you already knew that you couldn't have the cable sharing notches with CH pipes.
You have assured us that you had already learned what values of Ca to use for different ambient temperatures.I did think it was prity doggy having cables sitting on hot pipes
How have you been able to do the design work without a copy?
No - it has not got all you need to know. It is only a handy guide for some very basic stuff, and gives references to BS7671 - which is where the real information can be found.
You need both IMO.
Acording to me... Your a monumental bellend.. Look ive got much better things todo than lissing to your bull. Like getting layed. Drinking beer and enjoying myself. You should try it instead of sitting behind your computer flaming people. Your still not really getting to the bottem of what your problem is.
If i had come on here with no regard for the regs and argued with peoples advice staying i was just going to wing it in regardless i could understand. But Im not. Im researching everything and doing it buy the book.
My sparkys happy. Building regs are happy. Im happy. The only person thats got a problem is you. And i havent asured anyone of anything or stated anything.
Regarding the "design" work I had a sparky from site come round and tell me what i needed. He rewires/ wires up hoispitals and schools and big sites with a team of sparkys working for him. So im pritty sure his good enough to tell me what I need in my small 2 bed. I just told him what i want and where. 4 spots in the bathroom. 5 sockets in this room. Gas boiler. Ect ect and then wrote down everything he told me. I havnt got it all here with me but it was along the lines of 2.5mm ring. 1.5mm lighting 35amp rbco ring. 6amp rcbo for the lighting. 10mm raidal for the cooker. Metal consumer box. Told me ive got to get the specs on safe zones. That kind of thing. Is this a design?
If i was having 30 spot lights in each room and electric underfloor heating everywhere i could understand your consern.
To everyone else thats helped out in this tread i really appreciate it
You have assured us that you had already learned what values of Ca to use for different ambient temperatures.I did think it was prity doggy having cables sitting on hot pipes
How have you been able to do the design work without a copy?
Im unsure how ive assured you that when i dont even know what Ca s are..... Yet. All ive done so far is mount the backboxs so i can plaster the room.
So what are Cas????
Wouldn't make any difference, you'd still approach it in the same way as you already have. All would happen in practice is you might need a few more circuits.
Ca is the chemical symbol for Calcium. Ia is the fault current. Get a copy of the OSG and it will lead you through the process.
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