OP
andyelectric
And here's your answer.... Why would you need two 10KW showers in a flat?? Why not two 8KW showers if you really need two?? As you already have a gas supply for heating, Why not invest in a system that CAN run showers and store hot water??
I have a 4.6 KW shower here (no gas, except bottled gas for cooking) and that unit gives more than enough hot water in the coldest of weathers (not uncommon for temperatures to drop to -10C here in winter)...
Never had nor wanted an electric shower in the UK ever, and certainly not a shower rated at anything near 10 KW!! So as a i said Madness!! ...lol!!
One word... Cost.
I am well agreed that electric showers are poor compared to gas powered off the boiler, but they suffice and an electric shower is much cheaper than a new gas boiler. 2 showers are required as the missus is fed up with baths(the lodger has the first shower in her en-suite). And since we are having a second not much difference between 8kw and 10kw but the missus wants 10.
My question was though.. Will the 60A fuse suffice considering it's very rare the showers will be run at the same time, and not are electric showers any good. I have decided anyway that as it's so easy to remove the 60a I will, and will be on an 80a after the shower install.