Earth Fault Loop Impedance...

[Taggle]

I think their preparing the ground for combined AFDDs and RCBOs where there is a need to switch off the neutral, also 536.3.1 mentions RCDs needing to be switched for all live conductors.

 

[Strima]

Wonder why that is ?.
There is no requirement to switch/disconnect the neutral during over current conditions for a TT or TN arrangement except for certain requirements in part 7

I know, maybe you should ask Schneider.

 

[Ian1981]

I think their preparing the ground for combined AFDDs and RCBOs where there is a need to switch off the neutral, also 536.3.1 mentions RCDs needing to be switched for all live conductors.

No such regulation exists in bs7671 536.3.1 I mean

 

[Taggle]

No such regulation exists in bs7671

I miss typed it should be 531.3.1got over excited being on the forum!

 

[Ian1981]

I miss typed it should be 531.3.1got over excited being on the forum!

That’s for IT earthing arrangements.

Except where 531.3.1.201 applies.
531.3.1.201
For protection against electric shock there is no requirement to disconnect/switch the neutral in TT or TN systems
It would mean that all single pole rcbos are non compliant even on TN arrangements.

Also 531.2.2.201