1970's Wiring Modification and My Liabilities?

[Engineer54]

And make sure they are double pole RCBOs,

Idealy maybe but certainly not esential, at least not on a TN installation!!

 

[davesparks]

Hmmmm, that is really just a matter of opinion.

I am of the belief that if a protective device is going to detect a fault it should disconnect that fault. It seems daft that SP RCBOs will detect a N-E fault and then disconnect the L.

I think we are moving closer to DP RCBOs becoming a regular item, they are available in single module form for domestic CUs for the same price as SP RCBOs.
It's just a matter of time before they become mor readily available for non-domestic installations.

 

[Engineer54]

I think you are referring to Single phase plus neutral (1ph+N) rather than DP RCBO's. Yep, all in favour of them, but how readily available they are right now is another matter. I had a look at the major UK players a while back, and at the time none were offering these RCBO's within their UK website catalogues...

 

[davesparks]

Yeah sorry single phase & switched neutral is what I meant.
They are not common yet, but there is a guy who sells to trade only doing them for the same price as other pekoe for SP RCBOs