rcbo s

[martinxxxxxx]

Really hacks me off, it is usually the plumbers that muck my wires up!

It is everyone with mine plasterers, plumbers, tilers, tackers and chippys. And gas fitters, I chased out a brick wall above a c/u last week to fit a metal 2 by 4 trunking in to carry all the wires from the cu to the rest of the house, only took me 3 hours of hacking. I came back the following week to find the gas guy had installed his effing pipe in my chase. Luckily I carry a 25mm pipe splice.

Martin

 

[JBPElectrics]

Copper conduit?

RF....I have always been far to gullable!

 

[LoveRocket]

Really hacks me off, it is usually the plumbers that muck my wires up!

It is everyone with mine plasterers, plumbers, tilers, tackers and chippys. And gas fitters, I chased out a brick wall above a c/u last week to fit a metal 2 by 4 trunking in to carry all the wires from the cu to the rest of the house, only took me 3 hours of hacking. I came back the following week to find the gas guy had installed his effing pipe in my chase. Luckily I carry a 25mm pipe splice.

Martin

Heh heh, that's given me a good laugh, both at the plumber's cheek and your solution!

 

[yuk7000]

It sounds like a line to earth fault on equipment or your neutral lead is not connected in properly on the neutral bar ( or line or neutral not tight or not in correctly in the rcbo itself) unbalancing your rcbo causing it to trip. Dont think it will be a problem on the N & E on the fixed wiring within the installation itself as it would trip before you switch any thing on at the socket

 

[Spark123]

It could be a N-E fault on a TN-CS type system.
It could just be something not connected up correctly in the consumer unit.

 

[LoveRocket]

It sounds like a line to earth fault on equipment or your neutral lead is not connected in properly on the neutral bar ( or line or neutral not tight or not in correctly in the rcbo itself) unbalancing your rcbo causing it to trip. Dont think it will be a problem on the N & E on the fixed wiring within the installation itself as it would trip before you switch any thing on at the socket

A N-E fault won't trip an RCD until there is current flowing on the circuit.

A loose line or neutral wouldn't cause it to trip. How can this 'unbalance'?

 

[yuk7000]

A N-E fault won't trip an RCD until there is current flowing on the circuit.

A loose line or neutral wouldn't cause it to trip. How can this 'unbalance'?[/quote

LOVE ROCKET

I tested my theory today an rcbo will trip when no load is on the circuit, I tried it on a protus c32 rcbo today, with no live or neutral in the terminals and the rcbo in the on position( with the functional earth and supply neutral connected) when a wire was bridged between earth terminal on the board and the load neutral on the rcbo it trips.

Reason. as there is no discrimination on where current flows, ie a low resistance path. The returning neutrals of other circuits through the neutral bar can pass throungh the supply neutral of the rcbo to earth( if there is a n to e fault) unbalancing the rcbo and causing it to trip.

This also works at any point on the circuit i tried

You were right though about the slack connections it did not cause the rcbo to trip

 

[RF Lighting]

A loose line or neutral wouldn't cause it to trip. How can this 'unbalance'?

 

[mfarrow]

It could also work on any supply where bonding to metallic structures, pipes etc is providing a good connection to earth, and you're not drawing any current but your neighbours are.

Again, it's because you're providing a parallel path to earth for current to flow.

 

[ban-all-sheds]

can i use rcbos on a tn-c-s system

I think that the ignorance displayed by that question means that the answer should be no, you can't.

6 sockets thats it hope my dry liners have not caught the cables

Sounds like you have some sort of building/renovation work going on.

Please get an electrician to do the electrics.