Should all circuits in schools be protected by a 30mA RCBO/RCD regardless of their use?  This would apply to new or existing circuits.

Absolutely not - schools are often large and complex electrical installations with many sub-mains/distribution circuits - putting 30mA RCD "protection"  on them would result in many unneeded disconnections and so create extra hazards resulting from the loss of power (everything from lighting to kitchen refrigeration), not to mention loss of teaching time.

   - Andy.

Hi Andy

My intention there was for Final circuits rather than distribution circuits but I do see your point about unneeded/unwanted disconnections.  I do wonder how this will change when schools start to have EVSE and Solar PV fitted?

Hi Andy

My intention there was for Final circuits rather than distribution circuits but I do see your point about unneeded/unwanted disconnections.  I do wonder how this will change when schools start to have EVSE and Solar PV fitted?

I do wonder how this will change when schools start to have EVSE and Solar PV fitted?

It's already happening - the primary school near me had most of its south facing roofs covered in panels over last summer, and I doubt it was the first. What difference would it make though? - as they won't be downstream of other final circuits.

  - Andy.