rcd

[Sintra]

Why cant you use 30ma s type

Have you ever seen a 30 mA s type because I don't think there is such an animal.

 

[toptrics]

Ok why a s type 100ma

 

[toptrics]

There is such thing as a 30ma s type sintra

 

[Sintra]

Doesnt make sense, 100ma wont meet the disconnection times for final circuit, also wouldnt 30ma trip before 100ma so why would it need to be s type.

Of course it will. It will give you a max Zs of 500 ohms per circuit protected by it. A 30 mA will trip before a 100 mA but what if you get a higher leakage current of say 100 mA you need to then delay the 100 mA.

 

[Brendan976]

The 30 ma rcd won't see the fault as it will not be protecting the circuits that the 100 ma rcd is protecting. The main this is all circuits on a tt have to be protected by an rcd, does this make it any clearer.
Ben

 

[Brendan976]

Scratch the above the night nurse is affecting reasoning.

 

[toptrics]

Brendan what you just put doesnt make sense

 

[toptrics]

No 1 can answer it can they

 

[polo1]

Scratch the above the night nurse is affecting reasoning.

Bloody 'ell - hope your not driving!!!! It's in the name - "NIGHT" nurse, When I use that stuff it completely knocks me out

 

[Brendan976]

As my above post I am not doing anything very well at the moment.lol