No current flow on a balanced neutral?

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LarryFine

Master Electrician Electric Contractor Richmond VA
Location
Henrico County, VA
Occupation
Electrical Contractor
rattus said:
It is round and flat--like a pancake. The north and south magnetic poles attract each other which flattens the earth.
So just how far apart are the poles? :confused:
 

K8MHZ

Senior Member
Location
Michigan. It's a beautiful peninsula, I've looked
Occupation
Electrician
LarryFine said:
So just how far apart are the poles? :confused:

It seems the distance changes over the years and actually reverses from time to time. We are long overdue for a pole reversal much to the chagrin of those depending on GPS technology for a reference standard of their particular devices.

In all of time, the only reliable instruments so far has been the sextant and an accurate timepiece to reliably figure out one's position on the earth regardless of the position of the earth's magnetic field.
 

LarryFine

Master Electrician Electric Contractor Richmond VA
Location
Henrico County, VA
Occupation
Electrical Contractor
K8MHZ said:
It seems the distance changes over the years and actually reverses from time to time. We are long overdue for a pole reversal much to the chagrin of those depending on GPS technology for a reference standard of their particular devices.
You do understand it's an extremely slow process, don't you? It's not like we'll wake up one morning and the poles will simply be opposite what they are now.

And GPS has nothing to do with magnetism. It's based strictly on triangulation.
 

Besoeker

Senior Member
Location
UK
LarryFine said:
You mean it's round? :confused:
Geoidal, actually.
geoid.jpg

:grin:
 
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glene77is

Senior Member
Location
Memphis, TN
winnie said:
having two equal and opposite current flows at exactly the same time.

-Jon

Guys,

You can't have "Equal and Opposite Current" flowing at the same time!

The OP is also providing a "Moving Target" type of question.

This is a fun session, and possibly educating.
The moderator had a good handle on it.

I'll check back tomorrow and see where this creek meanders.
 

winnie

Senior Member
Location
Springfield, MA, USA
Occupation
Electric motor research
As I said, my post was only distantly related to the OP (yes, meandering!)

But if you have two beams of protons, crossing so that they are moving in nearly opposite directions through the same patch of space, then IMHO you have an example of 'equal and opposite' currents. The two proton beams are well defined, and are present on both sides of the intersection. In the intersection region, you have 1/2 amp of protons moving to the left, and 1/2 amp of protons moving to the right.

-Jon
 
LarryFine said:
In reality, there is no current. The mathematical balancing means that the physical event never occurs. All of the current flows through the lines and the loads, none through the neutral.

Another thing to think about. Staying with the 120V arena, the three phase circuit is 208/120V with a solidly grounded neutral. When you connect a three phase motor or a heater, the winding is either wye or delta. In either case you DON'T bring the neutral back because there is no neutral current to deal with. In the case of motors and single three phase equipment the ballance of the three phases IS assured and constant.
 

rattus

Senior Member
For Ronald

For Ronald

weressl said:
On an AC circuit?

You could lower the frequency, even to DC, in an effort to prove the point. Even if we had equal and opposite currents, the magnetic fields would cancel!

Ronald, look at it this way. The neutral always has some resistance however small. Currents in both directions would violate Ohm's Law.

The concept of opposing currents in a common conductor is simply a method used in writing loop equations. Nothing else.
 
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