Who knows what the next edition of the regs might call for, it's not really worth speculating about. There's nothing wrong with exceeding the requirements of BS7671, but in the real world, getting your customer to pay for it may be another matter.
MCB orRCD
- Thread starter rockdg
- Start date
Who knows what the next edition of the regs might call for, it's not really worth speculating about. There's nothing wrong with exceeding the requirements of BS7671, but in the real world, getting your customer to pay for it may be another matter.
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There are times when you would want to avoid using an RCD, such as a submains to an outbuilding so that you can keep the RCD protection local to the point of utilisation, and also split the installation across two or more RCDs.
I design many of my installations to allow circuits which do not specifically require RCD protection not to have it, such as cooker or kitchen appliance supplies, as these can sometimes be more prone to nuisance tripping RCDs.
There is no point trying to future proof installations. No one knows what the next edition of the regulations may or may not require, and it is unlikely to be published for at least the next ten years.
I design many of my installations to allow circuits which do not specifically require RCD protection not to have it, such as cooker or kitchen appliance supplies, as these can sometimes be more prone to nuisance tripping RCDs.
There is no point trying to future proof installations. No one knows what the next edition of the regulations may or may not require, and it is unlikely to be published for at least the next ten years.
again as you will see from original post reply im not professing to be an expert in electrics and i appreciate all the replies iv read as im sure they will help me and many others in the future cheers everyone
The regulations do not tell you how to do anything whatsoever.
The regulations detail the requirements for safety and proper functioning for the intended use. How you achieve this is largely up to you but in particular the regs require that circuits are designed and protected appropriately and that persons, livestock and property are protected from the dangers and damage that may arise in the reasonable use of installations.
Design and install to the current regulations (and the 17th edition will be around for a good many years yet) and all will be well.
Try and guess what future editions might require and you're heading into all sorts of hassle.
(It would also help a great deal if you all got your heads around the correct terminology!)
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MCB
(Unless you are referring to yer old BS 3871
)BS EN 60898 (1991) simply uses the term Circuit Breaker
(PS: The manufacturers are also wrong in this respect - but then manufacturers have no idea about regulations or British Standards anyway... which makes it a mockery that 134.1.1 requires we follow their instructions!)
To explain the problem; the OP appeared to think that MCBs or RCDs were alternatives, rather than circuit elements which are used in series.
Your post, as far as it could be interpretted in the face of having no punctuation, appeared to suggest that an RCD was sufficient.
This could have lead to the OP omiting an MCB with possible disasterous consequences.
Arc fault breakers will be the next new thing, you mark my words.
I blame the punctuation and grammar on my teachers. However the lack of technical knowledge regarding electrics and its associated regulations and proper practice,I will put that down to pure inexperience in aforementioned catagory, and i appreciate, as will the OP, all the guidance and advice available. thanx all
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