1 - 6 of 6 Posts

Ohms law?so on my JW test i got a question like this:

a three phase circuit is 208v and a resistance of 14.2. what is the amperage?

what formula does one use to find this?? i have not found any answers on google

There should be some assumptions if it is.

PF is 1.

Delta or Wye does matter. The branch of a delta or the phase section of a delta current.

The other assumption is , it is a balanced system?

Links from a internet search.

Chromalox is a thermal technology company. We engineer thermal solutions for the world’s toughest industrial heating applications.

www.chromalox.com

So the real question is. Do you have the concepts of the phase angle of a circle?

Vector addition?

degrees versus radians?

This will help. Concepts first, then try the calculations.

There is the some math resources. I do not know your level so do not take to heart any insult with the posts.

The real Question you should be asking yourself. How much points is it worth to my over all test?

I would move on and answer all the ones I know.

Concentrate on concepts, the math will come later.

If you have more wording on the question it would help.

Electrical contractor 37 years. Electrical inspector 2 years

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4,373 Posts

14.6 amps or 8.5 amps or am I wrong with both?

5.2 kw

Now I have to go back to my Henery book.

ya i fell you i did skip but felt stupid that i had no idea how to do it

There should be some assumptions if it is.

PF is 1.

Delta or Wye does matter. The branch of a delta or the phase section of a delta current.

The other assumption is , it is a balanced system?

Links from a internet search.

## Ohms Law

Chromalox is a thermal technology company. We engineer thermal solutions for the world’s toughest industrial heating applications.www.chromalox.com

So the real question is. Do you have the concepts of the phase angle of a circle?

Vector addition?

degrees versus radians?

This will help. Concepts first, then try the calculations.

There is the some math resources. I do not know your level so do not take to heart any insult with the posts.

The real Question you should be asking yourself. How much points is it worth to my over all test?

I would move on and answer all the ones I know.

Concentrate on concepts, the math will come later.

If you have more wording on the question it would help.

That’s ok, now you know what you have to do to make this your strength.ya i fell you i did skip but felt stupid that i had no idea how to do it

Trick, on test. Note key words and work the problem from there. Some questions are loaded.

Make the 3phase calculations your strength. Make your weakness in to strength and keep moving forward.

1 - 6 of 6 Posts

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