BS7671:2018

[Midwest]

Siemens link with some lovely vids, Petes gonna be annoyed;

Arc-Fault Detection Units (AFD) - Power Distribution - Siemens - http://w3.siemens.com/powerdistribution/global/en/lv/portfolio/pages/afd.aspx

Like those German CU's, nice & big.

 

[Andy78]

Thanks very much Midwest, some to go at for homework

 

[Midwest]

Thanks very much Midwest, some to go at for homework

If you understand it, can you let me know

 

[Andy78]

If you understand it, can you let me know

Well what I seem to have gleaned so far is they work similarly to an RCD, do much the same job, but can't be easily tested for correct operation. They will expand the size of a CU considerably, increase the cost even more, possibly be the cause of frequent nuisance tripping, and they are not even proven to work properly.

I can see some stern opposition from those more knowledgeable than me when the public draft comes out.

 

[Midwest]

See now I thought it was all those plastic CU's causing the fires!

Seems the AFDD, fills the gap between MCB & RCD, and primarily used on socket final circuits, but not exclusively.

I note the Siemens vid shows a corded drill arcing & sparking, causing a AF. We'll all have to go cordless.

 

[Bobster]

I'm a bit behind with these new proposals, does anyone have any detailed info about arc fault detectors and their application in the new version ?

The americans have been using them as part of the NEC for a while. In a word they are sh!t.

The yanks don't do testing, but there is no way outside a lab they can be tested if they are working properly.

 

[westward10]

Just logged onto IET website and can't find a dicky bird about it, unless was looking in wrong place.

 

[Deleted member 26818]

As far as I am aware, they do not work.

 

[Midwest]

Just logged onto IET website and can't find a dicky bird about it, unless was looking in wrong place.

You should read OP perhaps.

 

[westward10]

You should read OP perhaps.

It's me age

 

[Midwest]

It's me age

Know what ya mean.