I have a 60/80 amp supply coming into my house and am already running 2 electric showers one 10 Kw one 8Kw we never use both at the same time as our water pressure is too low to run both. At the moment we have a gas oven but would like to install an electric double oven but have been to that this will need another 30amp supply and with the 2 existing showers I will be overloading my supply and could cause my RCD to keep tripping, is this correct and if so is there a way round this?

A) What is a "60/80" service?

B) What country are you in? Most of us here are in the US.

The showers must be on 240V else you would be over 80 amps to begin with, and that's not a standard residential breaker size

Stan, whenever Residual Current Device is mentioned, the poster is from away, as we say in Maine. Just like you flatlanders in New York.

Most likely located in United Kingdom.

Why would the oven be on a RCD? The oven can be a 30 amp spur off the Mains, assuming you have a Main Ring.

You need to help us in the USA to help you.

We do not have any expert that is well versed in the electrical service of Europe.

Stan, whenever Residual Current Device is mentioned, the poster is from away, as we say in Maine. Just like you flatlanders in New York.

Most likely located in United Kingdom.
Yeah, I was pretty sure of that, but I knew he was not in the US.

Do you know if they use the term RCD in other countries?

I am not a world traveler by any means. My trips have been to Canada, DR, and Bahamas, and that is about as far I care to go.

I get the heebie geebies just going to Manhattan. Waayyyy too many people. And I will say, all nice people I have run into there. Don't anyone believe the rumors of New Yorkers being crude and rude. Not true. Just too many for my taste.

Only what I have run to here, Europe, India, and I think New Zealand, have mentioned RCD. So my guess is the better part of the East uses that terminology of RCD, which is another term for GFI that we use here.