Trying to work out cable size for a new shower and not sure what correction factors to apply to things these days. It's been a little while since I've done this.
Here's what I have done so far.
10.5kW @ 230 = 45.65A = Ib
Am I correct in saying that I can't apply diversity to this? The shower is thermostatically controlled, 10 settings.
Selected a 50A MCB (I know a lot of people prefer RCD these days but let's stick with MCB for now please).
Now I am really confused at this bit, do I need to 1.45 x 50A and divide by the correction factors to get Iz. It's the 1.45 x 50A that's stumped me, I'll still apply the other correction factors for grouping, ambient temp etc.
I find some stuff mentioning 1.45 and others not. So it is a bit unclear or have I completely got it wrong.
Any help appreciated.
Here's what I have done so far.
10.5kW @ 230 = 45.65A = Ib
Am I correct in saying that I can't apply diversity to this? The shower is thermostatically controlled, 10 settings.
Selected a 50A MCB (I know a lot of people prefer RCD these days but let's stick with MCB for now please).
Now I am really confused at this bit, do I need to 1.45 x 50A and divide by the correction factors to get Iz. It's the 1.45 x 50A that's stumped me, I'll still apply the other correction factors for grouping, ambient temp etc.
I find some stuff mentioning 1.45 and others not. So it is a bit unclear or have I completely got it wrong.
Any help appreciated.