IEC 60364 Table 48A

ProMbrooke:

davezawadi (David Stone):

I am not an advocate of AFDDs and have been at a number of meetings where they were discussed at length. I have no particular influence on JPEL/64, or the BSI or CENELEC or the IEC, although I have spent a lot of time with AFDDs and written a paper. I agree that they probably will not make a significant difference to the fire statistics, as they have not in the USA as far as I can find out. Have you looked at the front of BS7671? You can see that there are a lot of representatives on JPEL/64 who may have vested interests in selling AFDDs and possibly many other things too. The problem is not a lack of democracy but that ANY vested interests must be declared at all levels and stages. I should state that I have precisely none and my views are not necessarily those of the IET. Do you have any vested interests?

David CEng etc.

Vested Interests? Cutler Hammer bribed the NFPA and had UL create not only a 1699 standard tailored to Eaton's tastes but various studies claiming how arcing was not only behind most home fires but also how AFCIs would slash the number each year. Since day one it was destination science funded by a gamble.


I encourage you to read these 4 PDFs:

https://www.electriciansforums.net/threads/afdds-are-a-massive-fraud.175536/page-18#post-1720416

 

gkenyon:

ProMbrooke:

davezawadi (David Stone):

I am not an advocate of AFDDs and have been at a number of meetings where they were discussed at length. I have no particular influence on JPEL/64, or the BSI or CENELEC or the IEC, although I have spent a lot of time with AFDDs and written a paper. I agree that they probably will not make a significant difference to the fire statistics, as they have not in the USA as far as I can find out. Have you looked at the front of BS7671? You can see that there are a lot of representatives on JPEL/64 who may have vested interests in selling AFDDs and possibly many other things too. The problem is not a lack of democracy but that ANY vested interests must be declared at all levels and stages. I should state that I have precisely none and my views are not necessarily those of the IET. Do you have any vested interests?

David CEng etc.

Vested Interests? Cutler Hammer bribed the NFPA and had UL create not only a 1699 standard tailored to Eaton's tastes but various studies claiming how arcing was not only behind most home fires but also how AFCIs would slash the number each year. Since day one it was destination science funded by a gamble.


I encourage you to read these 4 PDFs:

https://www.electriciansforums.net/threads/afdds-are-a-massive-fraud.175536/page-18#post-1720416

 

Inventive way to get people to register on another Forum?

Errr, not my goal. I link to other forums all the time when information is present within them. Ill see if I can upload the PDFs to this forum however. My appologies :) 


Edit: I have removed the link.

ProMbrooke:

Zoomup:

 

I've long proposed discarding the emphasis/focal point of earthing and bonding and rather creating a new, third central pillar of source loop conduction theory, which rooted in admittance on the basis of protecting life and property rather than having earth electrodes and connecting metal things to one another.

What is "source loop conduction?". How does it work? Or is it just something that The Dr. and Rose Tyler would come across?


B.S. 7671 already covers safety of installations.


Reg. 131.1 "...intended to provide for the safety of persons, livestock and property against dangers and damage which may arise in the  reasonable use of electrical equipment."


Z.


 

Source loop conduction is the idea that high admittance between the line and CPC/metal work at any point that a fault  is capable of occuring can trigger disconnection of the over current device rapidly enough to prevent physiological harm and fire to the property.


Basically a more evolved theory of ADS.


I know BS7671 covers protection of life and property.

I'll stick with the approved, tried and tested systems in place at present thanks, not some unproven, unconvincing and unworkable "theory".


Z.

ProMbrooke:

Also this video. Most importantly around 25 minutes in, the author shows a breaker tripping magnetically vs thermally:



https://www.youtube.com/watch?v=emxfsOUTkUg

Yeh, but the fire was started by a propane torch not an electrical arc. Why worry about electrical arcs when the fire has already been started by another cause? Illogical.


Edit, add.


In the U.K. we have the wonderful 13 Amp. plug made to B.S. 1363. Have you ever heard of it? It contains a fuse. The fuse rating can popularly be either 3 Amp or 13 Amp, but other sizes are available like 5 Amp or 10 Amp. Flexes are protected by these fuses which are less in value than the 20 Amp circuit breakers referred to in the dated video.


Z.

Source loop conduction is the idea that high admittance between the line and CPC/metal work at any point that a fault is capable of occuring can trigger disconnection of the over current device rapidly enough to prevent physiological harm and fire to the property. Basically a more evolved theory of ADS.

 

I've long proposed discarding the emphasis/focal point of earthing and bonding and rather creating a new, third central pillar of source loop conduction theory, which rooted in admittance on the basis of protecting life and property rather than having earth electrodes and connecting metal things to one another.

To protect life and property.


Z.