Protection of TT submains

[JohnW2]

If the only way you can satisfy the disconnection times is with an RCD then one will have to be fitted for each distribution circuit.

Well, as I said, I can currently satisfy the disconnection time requirements with the fuses, but I don't think I should really 'rely' on that, for the reason I've given.

If I take the conservative view and assume that I 'might' need RCDs to achieve the disconnection times, then presumably my present setup is OK - one RCD per phase (each phase supplying one or more distribution circuits). The Type S RCDs will satisfy the 1 second disconnection time requirement on any of the submains.

Kind Regards, John

 

[ban-all-sheds]

maybe he's thinking you meant 6491X?

That would be the most obvious explanation, but that would be a very unusual error for someone as precise as BAS to make!

Yes, it's the obvious explanation.

Quite so! He appears to be slightly conspicuous by his absence at the moment!

I do have other things in my life.

 

[JohnW2]

maybe he's thinking you meant 6491X?

That would be the most obvious explanation, but that would be a very unusual error for someone as precise as BAS to make!

Yes, it's the obvious explanation.

Indeed it is, but is it also the correct explanation in this case?

Kind Regards, John