Electrical Tutorials - AC Electricity -What you need to know

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Electrical Tutorials - AC Electricity -What you need to know

Postby Itchy » Mon Aug 22, 2005 9:49 pm

This tutorial introduces Alternating Current, single phase and three phase.

It is the prerequisite for understanding how fuses and circuit breakers work and when and where you need to use and earth connection (tutorial 4).
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Last edited by Itchy on Tue Aug 23, 2005 1:14 pm, edited 2 times in total.
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ground question

Postby dozer » Tue Aug 23, 2005 8:49 am

Great explanation of three phase vs single phase.

One question though, I'm a little confused about the distinction between ground and neutral. Why doesn't a 3 phase user need neutral?
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Postby Itchy » Tue Aug 23, 2005 1:19 pm

There is no distinction between "Ground" and "Neutral", if you look at that last drawing you will see the "Neutral" is connected to "Ground" (Earth).

Three phase users don't need a "Neutral" because the electrical current travels back to the generator via the three phases (i.e. it will flow to you on Red, but back on Yellow and Blue), Then when Yellow is providing current, it will flow back via Red and Blue etc.

I'm going to discuss "Ground" (earth) in my next tutorial.
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Fixtures and fittings

Postby jazzman » Fri Mar 02, 2007 1:01 pm

How to build a $20,000 / £14,000 house and a $???? MOTEL Updated 21 March 09 - with BOQ and costs
Don't let this happen in YOUR house.
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