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A Troll, may be?????? only asking not accusingYes I do and no I do not. I am disappointed he has not described his background and said where he lives.
Discuss AFDDs are a massive fraud in the UK Electrical Forum area at ElectriciansForums.net
A Troll, may be?????? only asking not accusingYes I do and no I do not. I am disappointed he has not described his background and said where he lives.
TL.DR version. AFDDs are a crap solution to a problem we don't have, use an RFC and forget about them.
In more detail..
From IEC62606-2103
"Residual Current Devices (RCDs) are recognised as efficient to reduce the risk of fire by detection of leakage current and arcing to ground as a consequence of tracking currents within an electrical installation. However, RCDs as fuses or circuit-breakers are not able to reduce the risk of electrical fire due to series or parallel arcing between live conductors.
During a series arc fault, there is no leakage to ground therefore RCDs cannot detect such a fault. Moreover, the impedance of the series arc fault reduces the load current, which will keep the current below the tripping threshold of the circuit-breaker and the fuse. In the case of a parallel arc between phase and neutral conductor, the current is only limited by the impedance of the installation. In the worst cases of sporadic arcs, the conventional circuit breakers were not designed for that purpose."
And the test procedure from IEC62606-2013..
"The insulation across both wires is to be slit 50 mm (or 2 inches) from one end to a depth to expose the conductors without severing any strands.
d) The slit in the insulation is to be wrapped with a double layer of electrical grade black PVC tape and overwrapped with a double layer of fiberglass tape.
e) The conductors are to be stripped at the end farthest from the slit approximately 12 mm (or 0,5 in) for connection to the test circuits. The cable specimen shall be then conditioned to create a carbonized conductive path across insulation between the two cable conductors:
f) The cable specimen is to be connected to a circuit providing 30 mA short circuit current and an open circuit voltage of at least 7 kV. The circuit is to be energized for approximately 10 s or until the smoking stops.
g) The cable specimen is to be connected to a circuit providing 300 mA short circuit at a voltage of at least 2 kV or sufficient to cause the current to flow. The circuit is to be energized for approximately one minute or until the smoking stops."
AFDDs are an attempt to reduce fires in timber buildings using relatively high-current radials, in North America where poor termination and/or breaks in conductors start fires. In the UK RFC's are inherently tolerant of single faults, a feature that makes them incompatible with AFDDs. Given the choice between an RFC and an AFDD it has to be the RFC, it's a cheaper and much more reliable way to reduce the risk of fire from a broken conductor.
Well looking at Cookie's avatar, he is an AMERICAN one of the World's Police Force, the special relationship and all that goes with it,
And I'm assuming he's male. But now we all know, he's just an internet warrior.
A Troll, may be?????? only asking not accusing
I’ve only shared dribs and drabs of mine.I still don't see why you won't share your background. It's the first time I've ever seen this on a forum. You still haven't given a proper reason as far as I can see.
I’ve only shared dribs and drabs of mine.
I still don't see why you won't share your background. It's the first time I've ever seen this on a forum. You still haven't given a proper reason as far as I can see.
Clearly you've never been on a US forum, because AFCI angst literally goes on for 5 dozen pages. Search "Mike Holt AFCIs"
Me too, but it seems a bit deliberate in this case. And when you start making the sort of accusations he is making then it would help. In my opinion anyway.
What type of background would you like me to have? What would have you believe me?
You're just avoiding the issue again.
I never mentioned how long threads go for.
Go and a US forum and you will see plenty of not sharing credentials and people hold AFDD opinions far more extreme then mine.
I give up. I was interested in this thread but its going nowhere for me.
Hi - opinions are like ears, everyone’s got one or two. It’s just human nature to have more respect for statements if there is some background knowledge of the person making them. If you don’t feel you can share, that’s fine .Go and a US forum and you will see plenty of not sharing credentials and people hold AFDD opinions far more extreme then mine.
Hi - opinions are like ears, everyone’s got one or two. It’s just human nature to have more respect for statements if there is some background knowledge of the person making them. If you don’t feel you can share, that’s fine .
I’m a big believer in proper design, installation and testing. I might be wrong, but I think this would remove the need for an AFDD, at least in UK (?).
Hi - yes, I agree, don’t shoot the messenger .But some opinions are based on fact others are based on fiction. I don't understand how my links (openly saying your breakers detect arcing) is not supporting evidence in of itself. I don't care who the messenger is, but rather what is he trying to say and what evidence he has.
Reply to AFDDs are a massive fraud in the UK Electrical Forum area at ElectriciansForums.net
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