Add additional fuse box or replace/upgrade existing one?

Hello, How do you know you’re going to exceed your RCD current rating? Have you calculated / measured the maximum demand of your electrical installation? Assuming your property is a single dwelling, SPD’s aren’t a requirement of BS 7671 2018. The total value of your installation and equipment becomes the deciding factor in whether or not you risk negating it. I see too many electricians making their potential clients pay for this aspect, and charge a lot more for it.... when it isn’t really required. Regulation 443.4, page 101, provides the four examples where SPD’s are a requirement. It then goes on to mention a risk assessment exercise. Would it be beneficial to have a metal CCU fitted? Perhaps. Does it need to be done? Maybe. As always, get somebody to have a look at it and give you advise, hopefully honest advise 😊 Regards, Carl.

Definitely best to replace it with new one. Metal box, full RCBO unit with SPD protection. 7 years old is likely plastic one (non fire rated) which does not comply with 18th Edition of BS7671 so I doubt that you would sell it. However you can try to sell the RCDs and MCBs but you would get pennies for them.

Hi you can how ever install a separate inclosure depending on how many xtra circuits you want depends on how big of a inclosure you get. You can put a rcbo inside and that is a RCD built into the mcb in simple form. You will need to seek a qualified professional to carry out this work as it will involve adapting the meter tail and splitting them between your old consumer unit and your new inclosure. This would be a cheaper option less work and still safe and convenient. Hope that helps Output electrical ltd