AFDDs are a massive fraud

[Cookie]

Derailed another thread with AFDDs, so I am starting this one. I will simply say that UK RCDs and MCBs provide arc fault protection as is. UL not only knows that, but extensively researched UK power systems in an effort to emulate the very same concept 40 years. One the simply fact (growing concern) that the US National Electrical Code does not prohibit a maximum earth fault loop impedance.

 

[Bobster]

What is it you're trying to post. Links to other sites?

 

[Sisyphus]

Dr Joe Engel's paper details how AFDD's passed UL , this is relevant to the OP ~S~

 

[Sisyphus]

They use a 'simulator' , which introduces 15KV to a piece of zip cord with a cut in it, wrapped in flammable tape.

Of note is that UL created , vs testing to a standard here.

Which is unprecedented

~S~

 

[Sisyphus]

Unless the poco has a very bad day, mother nature has it in for you, or you've gone wild with some sort of tesla coil install, 15KV just does not exist in the average dwelling ~S~

 

[DPG]

Sisyphus - are you confusing AFDD devices with SPDs?

 

[Bobster]

Sisyphus - are you confusing AFDD devices with SPDs?

Maybe, but the test for arcs they use in a lab is several KV. I have in the past read a document, possibly the one he is referring to.

 

[DPG]

Maybe, but the test for arcs they use in a lab is several KV. I have in the past read a document, possibly the one he is referring to.

Probably so as part of the testing yes. But his post seemed to be intimating that because such high surges are rare on household power supplies then AFDDs aren't needed.

 

[Devonchris]

On the one hand, you say the poster has raised interesting points, on the other, you want to know more about the poster before you assign any credibility to the interesting points?

Yes, and why not?

If Theresa May announced that she believed all electricians pay should increase by 100%, and that she had a bill on the issue for parliament, and that she was confident of getting the required votes, then I would find that interesting, but not very credible.

On the other hand that Prof Brian Cox fellow on telly I find very credible, but I have not the slightest interest in what he drones on about.

Now we come to Cookie. Do I believe him? I believe he is sincere in what he is saying but misguided and wrong. Why? Chiefly because his credibility score is nil.

 

[DPG]

I'm with Devonchris on this one. Although I do like some of the Brian Cox stuff.

 

[Devonchris]

I'm with Devonchris on this one. Although I do like some of the Brian Cox stuff.

I think I'm probably missing out there, and I have tried. But as someone somewhere once said, you can take a ----- to culture but you can't make them think.

 

[DPG]

Must admit I don't understand a lot of his subject matter, but interesting nonetheless.

------ - yep another interesting subject.

 

[Cookie]

MOST OF ww1 AND 1/2 OF ww2 ,

Weren't most here born after 1947?

 

[DPG]

1847 for Tel.

 

[Pete999]

Weren't most here born after 1947?

1847 for Tel.

What has 1947 got to do with this?

 

[Cookie]

then fix the lack of loop impedance testing. cure the disease, not the symptoms.

Exactly. Code should not mandate what technology cures the disease.

Assuming that a short circuit at 120 volts being cleared thermally instead of magnetically is a fire risk to begin with. UL was only able to prove that with flammable tape and neon gas transformers...