A Publication AFCI manufacturers and CMPs don't want you to read

[romex jockey]

Then i would simply encourage you to sit on the sidelines and digest what is offered Dave

There is a LOT of information out there that could kill this manufactured disease , but it needs a venue to do so

~RJ~

 

[mbrooke]

Yes because GFCI's were a load of crap too jammed into a big old receptacle that didn't fit in a box. And you have no Idea if it's of any benefit to any of the end users. For all you and the others know, AFCI's have saved hundreds of lives.

Not from an operational perspective. And not from an understanding perspective. Studies determined what level of current was dangerous to the human body, and investigators were able to determine live cases or damaged cords after an accident. There was evidence from all angles to support them. And even prior with underwater luminaries GFCIs were determined to be successful in catching broken EGC in combination of an energized shell. Any of which can be recreated, measured and verified to trip a GFCI. Arcing not so much. And in case the electrician was not happy about the new technology he had the alternative of an equal potential ring. And fwiw on construction site (have to find the code article) one still has the option of omitting GFCIs with assured grounding.


http://www.necconnect.org/resources/gfcis/


Now, where the original GFCIs junk in terms of reliability? You bet, but the basis and threshold at which tripped has never changed.

Hello.

In fact at first there was no difference between french electrical installations and US electrical installations (115 /230 V).

The TT was been mandatory when voltage was increased 115 / 230 to 220 / 380 V (in 1960's years) ( for all dwelling)

Why was TT made mandatory? Does TT offer any benefit to fire protection? Or just a preference?


This explains the GFP main breakers. They were originally 500ma?

In this SLT, Main breaker with differential device are mandatory associated with a ground earh independant of the neutral.

But for other areas we have 4 others SLT in function since décades...And the SLT TN-C-S is close to your US dwellings.

So TN-C-S is not allowed in French dwellings? Even commercial business?

Sorry it's in french but the patterns are understandable

https://fr.wikipedia.org/wiki/Schéma_de_liaison_à_la_terre

Best regards

Thank you, and much respect. Best regards too

 

[mbrooke]

And a decade and half (roughly the same time point afci's are at now) after their intro into the code, gfci's were more than proven, reliable, and cheaper too.

There may have been objections to gfcis in the beginning, but were there still reasonable doubts about efficacy/exact purpose in the middle to late 1980's?
In fact, I believe there was something somewhere that had mentioned that in the first couple of decades after their debut, that gfcis had cut the the no. of accidental electrocutions in half.

And I believe that considering the number of two prong cord caps and receptacles. Personally CMPs made a huge mistake not mandating whole house grounding receptacles in the early 50s which lead to manufactures making 2 prong cord cap appliances even into the years when grounding outlets were popping up. So GFCI did wonders with existing tools. But still, even if everything had a fully functional EGC from the 20s, that does not protect against direct contact of a damaged cord. So no matter how you slice or dice it GFCIs targeted the root of a very real problems.