OP
Silly Sausage
If it had no RCD would there not be another type of protection?
What about what the DNO put in their cut out thingys, what are they called?
No idea, I've never seen inside one!
Discuss cable behind 50mm insulated plasterboard in the Electrical Wiring, Theories and Regulations area at ElectriciansForums.net
If it had no RCD would there not be another type of protection?
What about what the DNO put in their cut out thingys, what are they called?
So the trick is to make sure the impedance is low enough that any fuse will operate.Unfortunately on a TT the dno fuse is unlike to operate due to the high impedance.
Cheers
So the trick is to make sure the impedance is low enough that any fuse will operate.
It's not difficult, I do it all the time. My own home is on a TT and has a sub 1 ohm impedance. If memory serves me well it's around the 0.5 - 0.6 mark (can't be bothered to go and get the cert) my record is 0.29.
Well if we want to be pedantic it's actually a Ze although the terms are interchanged all the time when talking about TTs. Ra is the resistance of the electrode itself measured with the spike system. The 0.29 was a domestic
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