Rcd fault ?

[Mt1975]

Hi have a rcd and 4 fuse that keep tripping. Fuses are. 1 is for cooker. 2 is for lights 3 is water heater  and 4 is sockets. Removed all plugs from sockets. Can only get a TV or a lamp to work at same time any more fuse and rcd trip. Reset rcd and only reset cooker fuse and it trips tries the same with just water heater and it trips tried with just the lights and it trips. So it's like half the fuse box is triping out all time. Half runs upstairs lights all fine. Towel heater and shower all a fine.  Any ideas why all off a sudden 4 different circuits all trip fuses and rcd

 

[Murdoch]

The rcd is tripping because you have fault conditions.... You need a competent spark with a MFT and knowledge how to fault find...

 

[Mt1975]

Is there anyway all 4 circuits and be connected ?

 

[Murdoch]

Turn off all 4 mcb's, reset RCD, turn back on each mcb, when the RCD trips again this may indicate which off the 4 circuits has a fault

 

[kerching]

Yes with the neutrals, unless they are DP RCBOs and I sincerely doubt that 

 

[Mt1975]

All 4 mcbs trip all together and even 1 at time. So could be a neutral side then if they are all connected. 

 

[Sharpend]

Had any work done recently? Like a change of consumer unit? 

 

[Mt1975]

Last work was a wet room kitchen remodel with extra sockets and new fuse box. But that was 2 years ago and all been fine till now.