Home>Discussions>ELECTRICAL & LIGHTING>Can someone explain the difference between phases and poles??
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goldhiller
Re: Can someone explain the difference between phases and poles??
JLMCDANIEL wrote:

100 years ago when I worked in a printing plant, we used Naptha to clean up the ink. Not sure you can even get it anymore.
Jack

Thanks much, Jack. I'm also hoping for an answer from someone different though....and for a different reason. Bear with me, if you will. That answer may be willingly forthcoming or may not. We shall see. I kinda doubt it. They may be "too bashful" to answer.

goldhiller
Re: Can someone explain the difference between phases and poles??
JLMCDANIEL wrote:

100 years ago when I worked in a printing plant, we used Naptha to clean up the ink. Not sure you can even get it anymore.
Jack

Sure can. Got a gallon can over at the shop. It's sold here in both the hardware stores and the paint stores.

RabbitGun
Re: Can someone explain the difference between phases and poles??

Ignorant small minded discussion.

Any one here even heard of concentric neutral cable?

Romex Racer
Re: Can someone explain the difference between phases and poles??

uh huh. YAWN.

djohns
Re: Can someone explain the difference between phases and poles??

There's no limit to what a sick mind will do . :rolleyes:

rickpantel
Re: Can someone explain the difference between phases and poles??

Hello again to the posters on this forum:

I started this discussion on "the difference between phases vs poles", and was heartened to see the comprehensive answers provided by the very knowledgable members of this forum.

Partway through the discussion, I also posted a supplemental question asking why the power pole outside my house had only one wire on top, and why there was no return lead for the primary transformer. This question, suprisingly, stumped some of the responders. I stumbled across the complete answer recently:

The answer is that our power distribution system appears to be what is known as "Single Wire Earth Return" (SWER) or "Single wire Earth Ground" (SWEG).

Basically, the return path from the high voltage distribution line to the electrical grid is via the earth (ie, the dirt and water table) itself, rather than an electrical wire. This system was developed in New Zealand in the 1920's for power distribution in rural areas where houses are spaced by several kilometers. The advantage is that only one wire needs to be strung along the poles, rather than two, resulting in a great reduction in cost. The disadvantage is a reduction in transmission efficiency. The system is widely used in rural America, Canada, New Zealand and Australia.

There is an excellent discussion and review on Wikipedia: http://en.wikipedia.org/wiki/Single_wire_earth_return.

Thanks to all who posted a response to my questions. :)

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canuk
Re: Can someone explain the difference between phases and poles??

rick ... believe or not we had touched on that topic of SWER and it seems your BC Hydro is employing this as well as our Hydro folks in the urban areas as well as the rural.:)

Sabio
Re: Can someone explain the difference between phases and poles??

I have a related question:

In my house I have a two phase 3 wire system that produces 220volts between phases and 120volts between each phase and neutral.

If I leave one phase on but turn the other off (via breaker) I still measure a voltage of about 40V between the phase that is off and neutral. Shouldn´t it be zero since I have disconnected that particular phase? :confused:

Anybody??

kentvw
Re: Can someone explain the difference between phases and poles??
Sabio wrote:

I have a related question:

In my house I have a two phase 3 wire system that produces 220volts between phases and 120volts between each phase and neutral.

If I leave one phase on but turn the other off (via breaker) I still measure a voltage of about 40V between the phase that is off and neutral. Shouldn´t it be zero since I have disconnected that particular phase? :confused:

Anybody??

Digital meter? Throw it away for these types of readings.

JLMCDANIEL
Re: Can someone explain the difference between phases and poles??

Actually you are probably reading the other phase to neutral through a 220 device's load.
Jack

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