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#4520 - 09/29/01 01:28 PM Electrical Wiring
Joe Tedesco Offline
Member

Registered: 10/07/00
Posts: 3325
Loc: Boston, Massachusetts USA
Look here for some suggestions on electrical wiring.
http://urbanideas.com/



[This message has been edited by Joe Tedesco (edited 02-08-2003).]
_________________________
Joe Tedesco, NEC Consultant

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#4521 - 09/29/01 02:46 PM Re: Electrical Wiring
Anonymous
Unregistered


 Quote:
“You use the cold pipe because it goes directly outside into the ground,” Mike says.


Oh, well. Some people never learn.
The misinformation just goes on and on...

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#4522 - 09/29/01 02:50 PM Re: Electrical Wiring
pauluk Offline
Member

Registered: 08/11/01
Posts: 7693
Loc: Norfolk, England
The use of a water pipe as a grounding electrode was outlawed by the IEE here as far back as the 1966 edition due to the increasing use of plastic pipes and couplings. Even the 1955 notes state that caution should be used and to check.

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#4523 - 09/29/01 03:14 PM Re: Electrical Wiring
Anonymous
Unregistered


Yes, but my point is that the current needs to get to the EGC, into the service panel, and onto the GC back to the xfrmr. Getting to the earth outside the window is not what grounding is all about.

Ya do th'hokey-pokey and ya turn yerself aroun'...

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#4524 - 09/29/01 03:16 PM Re: Electrical Wiring
Bill Addiss Offline
Member

Registered: 10/07/00
Posts: 4196
Loc: NY, USA
 Quote:
(GFI's)They are designed to trip (shut off) as little as 240 milliamps of voltage in 0.025 seconds.


That number (240ma) is way high! (60 times!)

On the subject of the DIY avice: One of my peeves is that too many people tend to over-simplify things to the point where just about anyone thinks that they can do anything without a second thought. I'm sure that it causes many a dangerous situation.

Bill

[This message has been edited by Bill Addiss (edited 09-29-2001).]

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#4525 - 09/29/01 03:59 PM Re: Electrical Wiring
pauluk Offline
Member

Registered: 08/11/01
Posts: 7693
Loc: Norfolk, England
 Quote:
Originally posted by Dspark:
Yes, but my point is that the current needs to get to the EGC, into the service panel, and onto the GC back to the xfrmr. Getting to the earth outside the window is not what grounding is all about.

Ah... Our different grounding systems again! I guess if the pipe used to ground a receptacle was properly bonded to the N-G busbar it would be OK, but it seems kind of tacky. And someone might come along later and cut out part of that pipe and insert a plastic coupling.

Ya do th'hokey-pokey and ya turn yerself aroun'...
"Hokey-cokey" here, for anyone who's remotely interested!

Bill:
I see these over-simplified explanations here regularly. I'm always saying to myself, "Ah, yes, but..."

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#4526 - 09/29/01 04:50 PM Re: Electrical Wiring
Anonymous
Unregistered


So now milliamps measure voltage??

Leak 250 milliseconds of 240 milliamps of voltage and the breaker will stumble and fall (trip).

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#4527 - 09/29/01 05:12 PM Re: Electrical Wiring
Bill Addiss Offline
Member

Registered: 10/07/00
Posts: 4196
Loc: NY, USA
oops,

I missed the Voltage part
Voltage and Current get mixed up a lot from what I see. The time factor is probably off too. I think I've heard 1/10th second response time. Does anyone know?

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#4528 - 09/29/01 06:56 PM Re: Electrical Wiring
nesparky Offline
Member

Registered: 06/21/01
Posts: 650
Loc: omaha,ne
I wish there was a way to get these jerks out of the electrical business. Ignorance gets it's own reward.
_________________________
ed

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#4529 - 09/30/01 08:37 AM Re: Electrical Wiring
pauluk Offline
Member

Registered: 08/11/01
Posts: 7693
Loc: Norfolk, England
I've sometimes heard the "experts" in big DIY stores giving bad advice to customers. If it's something that could be dangerous, I'll step in and try to straighten it out.

Whether they'll take notice or not, I don't know, but at least I tried.

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