superiore said:I was worried that if I use 2.5 cable, the wires inside the pump shower unit look alot thinner than the 2.5 connection I will be making to the socket...
Does it? Or does it show that some people have such an A-A-F view of electrics, that they think a large cable will "push" so much current into something that it will be damaged, and therefore a nice safe way to prevent a device from being damaged woud be to use thin cables - that way you can't give it too much electricity.AdamW said:This is quite a common thought actually (although not always regarding shower pumps!), and it shows that people are at least thinking about what they are doing rather than blindly following advice..
ban-all-sheds said:Does it? Or does it show that some people have such an A-A-F view of electrics, that they think a large cable will "push" so much current into something that it will be damaged, and therefore a nice safe way to prevent a device from being damaged woud be to use thin cables - that way you can't give it too much electricity.
Why should the size of the cable supplying a device cause overheating of the device?
No, I wasn't and I did, and my statement above about AAF was an attempt to explain why I was concerned about superiore's view that using a thick cable to power his pump would damage it.AdamW said:ban-all-sheds said:Does it? Or does it show that some people have such an A-A-F view of electrics, that they think a large cable will "push" so much current into something that it will be damaged, and therefore a nice safe way to prevent a device from being damaged woud be to use thin cables - that way you can't give it too much electricity.
My point is, it is better that people (well, at least one!) are considering their DIY electrics and asking for considered advice instead of blindly leaping after reading a few posts. Ban, you were not born knowing all about voltage drop, cable ratings and current. I am sure you learned by asking questions.
It wasn't rhetoric, I wanted to know what he thought was going on, and why, and what fundamental understanding of voltage and current he had.Why should the size of the cable supplying a device cause overheating of the device?
Ah - I don't mean sheds as in wooden garden refuges from SWMBO, I mean places like Bodgit & Quickfit, [sarcasm]with their range of fine products at keen prices, and their helpful and knowledgeable staff[/sarcasm]I still haven't figured out what you have against sheds either!
djrpowell said:When you think about it the mains electricity +/+ and 0 or live and neutral are constantly alternating between a voltag of 230V and -230V. This can be thought of like a mountain, the height of which is the value of 230.
Now the two connections live and neutral are always different in potential or voltage which makes the electrons want to flow through the shower device.
However, the resistance of the shower is fixed. This means that the current is the same whatever current flows.
The problem is that if you use a cable which cannot take the current or flow of electrons pusing through the wire then the wire melts.
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