Hey Barnyard Engineer Electrical

John T · Jan 24, 2020

You asked an EXCELLENT question but it got lost on the previous page. While nowhere near perfect and far from complete, I did give you a very basic short n sweet answer which I will link below in hopes it helps answer your great question. Basically why you should NOT mix n match or substitute Neutral for Ground and vice versa. Hope this helps

https://www.yesterdaystractors.com/cgi-bin/viewit.cgi?bd=ttalk&th=2128765

John T Retired Electrical Power Distribution Design Engineer
Neutral is NOT Ground

BarnyardEngineering · Jan 24, 2020

Thanks John T, I saw it. Very much appreciated.

old · Jan 24, 2020

Ah but what is the ohm reading between the 2????????????????

John T · Jan 24, 2020

You sure are welcome

John T

John T · Jan 24, 2020

Ah, Sorry I cant answer that but can tell you how to figure it out Rich. Its an easy calculation, I'm sure you can compute it.

The ohms of resistance between the two (say a Neutral and Ground at a receptacle or dryer or water heater etc) is the resistance per unit length of the wire times the length. Easy Peasy calculation, piece of cake.

For typical copper wire branch circuits and subject to its size, the resistance would be VERY LOW and a cheap ohm meter may not yield an accurate result.

Good question Rich, hope this helps and answers your question.

John T

old · Jan 24, 2020

Did not help much since all my stuff is old enough to be 3 wire not 4 wire so have not place to taking readings

buickanddeere · Jan 24, 2020

(quoted from post at 14:55:55 01/24/20) Ah but what is the ohm reading between the 2????????????????

Ohms had better be low . The ground bond to the neutral is supposed to keep that conductor as close to earth potential as possible .
At the first service where the neutral and ground are bonded . It is cheap and tacky but the ground and neutrals can be on the same bus . Any pony panels supplied from that first panel need to have the neutral bar float isolated from the ground system .
Otherwise voltage drop due to current flow will raise the ground system above earth potential .
Nobody here heard tell of tingle voltage in livestock barns ?

John T · Jan 24, 2020

Yep it takes a good ohm meter (and measurement points) to measure such typical low resistances, sorry I couldn't help more but at least I taught you how to compute the resistance you asked about.

Best wishes Rich, glad to help. Just multiply the unit of length resistance times the feet of wire, you can do this !!!

John T

JMOR · Jan 24, 2020

John, I tried to send you an e-mail....might be out of date address @msn.com

John T · Jan 24, 2020

Thanks, I got it, the picture isn't coming through very well I will try to enlarge and take a closer look. Try and post it here maybe ??? A picture is worth a thousand words !!!!!!!!

John T

JMOR · Jan 24, 2020

resent as picture instead of attachment. Might post later if worthwhile

Geo-TH,In · Jan 24, 2020

JohnT
We have a lot of Ohmless people in Terre Haute.
I tend to think those people aren't wired right.
Any idea how to fix their problem?
Geo.

John T · Jan 24, 2020

I guess offering them a job is out of the question lol

John T

Geo-TH,In · Jan 24, 2020

JohnT,
Are you kidding me? A job might make them lose their disability.
geo.

Hey Barnyard Engineer Electrical

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old

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