nolabama

wandering around the internet i find this http://www.copper.org/applications/e...erquality.html

are they for real or are they just trying to sell more copper , in particular i am wondering about the number of recepticles and the neutral recommendations

leland

# of rec. as a(personal) rule I stick to about8-10. No code.
Neutrals, with harmonics, In an office setting/commercial, some validity to the over size.
Ground: 250 covers this pretty well.
As far as the 12 G. being safer... That all depends on the load (10 questions to ask).
It's all safe if sized correctly.
So Yes, They are selling copper. (imo).

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"When one American is not worth the effort to be found, we as Americans have lost" (Rolling Thunder MA 1)

brian john

In my experience this issue is way overblown.

The few times I have seen neutral issues was in casinos and call centers. Never in office buildings and I have completed 100's of office building harmonic surveys.

The number one reason to install harmonic mitigation equipment and/or more copper is a DAMN good sales person.

Marco Electric

I agree with a neutral for each circuit. I heard storys about guys getting hit on the neutral in multi-wire circuits. It happened at Merck,which has a major hard-on for saftey. After a guy got hit on the neutral they changed all multi wire circuits to one hot,one neutral. CHA-CHING.

As for multiple rods,I've had this discussion with inspectors and contractors. A ground is a ground is a ground. If you want me to put in 3 rods in the shape of an obtuse triangle and then run 4 bare cooper around and then encase it all in concrete. CHA-CHING.

I do agree with not using metal conduitr for equipment ground. I know you can,and I do it. I just think a coupling coming loose or the pipe being damaged could compromise the ground and not effect the circuit,potentially leaving a hot circuit ungrounded.

All of this is in my humble opinion of course.

leland

Offices,not so much now. With the first generation of electronic ballasts (80s) it was a real issue.
Now the concerns are as stated in server/computer rms.Can also be an issue in the wireless sites.

__________________
"When one American is not worth the effort to be found, we as Americans have lost" (Rolling Thunder MA 1)

ACB

3-6 outlets per circuit,,,, pael manufacturers better start doublig the capacity of panels,,, imagine a 3000 square foot home, 140 breakers later

MDShunk

If I was a trade organization representing the copper industry, I'd say all the same things copper org says too. You can't blame them.

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InPhase277

This is a load of CRAP. 3 receptacles per circuit? Oversized ground wire? Puh-lease. Why? The ground wire can't carry anymore current than the circuit conductors can supply. No shared neutrals? Hell, in that case, we should apply it the service too. We will start pulling two neutrals for single phase services, and three neutrals for three phase services.

Suck my hatchi.

Greg Swartz

Last year I did a 6000 sq ft house, and it was tough getting everything into 1 panel... (concrete house: Concrete floors, concrete walls... so no other panel was going to fit...)

AFCIs made it more fun

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Greg
Colorado Licensed Journeyman Electrician, Master Electrician, Electrical Contractor, and Electrical Engineer.
USMC 1991-2000 1142 / 8563