235 question

[graham123]

Can anybody answer this question and show me the formula.

A radial circuit has a load current ib of 28a at 230v ac and has a combined live conductor resistance of 0.16ohms at 20degrees. Determine the voltage drop for this circuit show calculations.

Thanks

 

[telectrix]

ohms law will help.

 

[Farmelectrics]

You need to give more information length of cable type of cable etc

 

[markc123]

mV/A/m x Ib x Length / 1000

Give it a crack, then we shall help you.

Best way to learn.

 

[Darkwood]

Personally i will say it is homework and should not be given to you, the fact that you have been asked the question would suggest its in your notes and copying parrot fashion off here will not help you learn or understand it, im been nasty to be nice here its time to get you head into gear and learn and stop taking shortcuts which amount to copying of the person next to you... these formula are vital to your job and if incorrectly done can be a costly mistake if not a safety issue.

Learn it the proper way thus you understand it if you still struggle your tutor is the best one to ask as he knows your expected level of knowledge to address the question and can point you to your own relevant notes.

 

[markc123]

Agree with Darkwood.

Is that the only information you've been given OP?

If you've been given more than you have posted then try work it out using the 'known' VD equation.

If that's all you've been given, the question is slightly more taxing and all i can say too help you is try and re-arrange the 'known' equation.

It's a power circuit, so think 11.5v and go from there....

 

[Richard Burns]

Darkwood has it right, but so does Telectrix, not so sure about the other two!!:yesnod:

This is basic ohms law: voltage dropped over a resistance with a particular current flowing.

 

[markc123]

Hmm.

Epic Fail. Just waiting for biff to get hold of this.

Richard has tested my brains, and i thank you.

All to easy to get afixed around the 'norm' of volt drop calculations, and forget theres other ways of doing things which are shoved upon you in college.

OP ignore me, and pretty much everything i say on here lol.

Embarrasing.

 

[telectrix]

that's what i meant. he's given I and R so V=????? but when i first read the OP, i was thinking mohms/m, where's the length?

 

[Silly Sausage]

Post Massively edited!!!!!! :smilielol5:
I'll never be a teacher.

Thanks Mark!

 

[markc123]

I'll be the Electrical Trainee's will love reading this thread when they see time-served electricians miss-read a question lol.

Sigh.

 

[Badged01]

Electrical Trainee's will love reading this thread when they see time-served electricians miss-read a question

Get to the back of the queue Markc123 ..... there have been plenty of other thread nuggets over the years that have kept everyone happy & amused. Let him who has never sinned (made a mistake) cast the first stone ...... and all that!!

 

[telectrix]

we all make mistakes..... as the hedgehog said, getting off the bog brush.