Upgrade shower - cable size
- Thread starter Alison556
- Start date
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433.3.1(ii)
The circuit is already in place as she has an 8.5kW shower installed - she wanted a new one and more powerful if possible and if it was going to be a straight swap, then I can do that. If the cable is suitable, then I won't obviously.
If it is 6mm cable, what's the highest power shower that can be installed?
Yeah, when the council renovated the houses, they installed showers for everyone that didn't already have them - mother had had hers for ages so didn't get a new one. She had got permission for it at the time it was installed.
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Are you sure that it is a good idea to say things when you have no idea?
Because I don't - I think it's a b****y stupid idea.
I know you were, as unlike you I am able to pay attention.As i was referring to Flameport's post
And in my reply to you I did not give any indication that I thought you were doing anything other than referring to Flameport. So why you thought that pointing out that you were doing something which I had not said or implied you weren't was funny, IHNI. Your limited intellect, maybe?
You really must learn to pay attention.
But back to the plot. I'll re-do the quote, so that it is simple enough for you to understand what I'm doing.
Flameport is wrong - of course for this type of circuit you can have a 50A breaker on a cable with an Iz of 47A.
And that is why I asked you why your advice was to listen to him, and why I said that listening to EFLI was a better idea.
What's your maximum cable size?
For what reason(s)?
Indeed. It's also untrue that it would operate at 45A in 16 minutes, as it mustn't operate at a current of less than 1.13 times its rating (which is 45.2A), but must operate within an hour at 1.45 times its rating.
Not sure how many times I have said this:No, i would not install a 50a breaker on a 6mm cable. Minimum cable size i install for showers is 10mm.
Kindest regards,
DS
A FIXED LOAD CANNOT OVERLOAD.
You only need to provide FAULT PROTECTION. So if a 6mm^2 cable can thermally withstand the fault current until disconnection occurs, then a 50A protective device will adequately protect the cable. Simples.
But you will remain incapable of understanding it?
We all know the answer to that.
Except, perhaps, DS, but then he'll probably be wrong anyway.
Except, perhaps, DS, but then he'll probably be wrong anyway.
Well, I'm sorry for causing a row
I think we'll just play safe and replace it with a new 8.5kW shower. I can't see any way round replacing the cable as it runs under the floor and we've no access under the floor - floorboards, plywood and then laminate.
The only other thing is if a 9.5kW would run safely off 6mm and a 40amp breaker - but I'm scared to ask lol
I think we'll just play safe and replace it with a new 8.5kW shower. I can't see any way round replacing the cable as it runs under the floor and we've no access under the floor - floorboards, plywood and then laminate.
The only other thing is if a 9.5kW would run safely off 6mm and a 40amp breaker - but I'm scared to ask lol
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