Hey all, my house is 27 years old 3 phase and equipped with two 300mA RCCBs.

Can I replace them both with F204 A-63/0.03? Will I experience nuisance trips on the main DB since theres so many load?

There is no extra 10mA RCCB for the solar water heater with electric backup. Do I need one? The pipes in the wall seem to be made of PPR material.

DIY replaced MCB few months ago.

Picture of my db:



This post has been edited by DroppedJaw: Jun 7 2024, 06:57 PM