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Anonymous Poster

voltage drop and cable size calculation

08/04/2008 4:04 PM

what is the voltage drop and cable size of 800 mtrs length cable,400 amps load.max rating of connected motor is 30hp
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JohnDG
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#1

Re: voltage drop and cable size calculation

08/04/2008 6:10 PM

For cable size 24AWG, voltage drop = 29kV

For cable size 1AWG, voltage drop = 128V

You have left out some useful information. Please re-phrase your question.

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Anonymous Poster
#2

Re: voltage drop and cable size calculation

08/04/2008 11:29 PM

please mention, supply voltqage,what type of cable(Cu/Al) ,how many phases,overhead or underground cable line.

Motor is 30 hp and other loads to comprise to add up 400Amps?
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PWSlack
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#3

Re: voltage drop and cable size calculation

08/05/2008 4:20 AM

British Standard 7671.

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Isti80
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#4

Re: voltage drop and cable size calculation

08/05/2008 7:53 AM

Measure the resistance of the cable and multiply it with the current.

Of course, you could also calculate it but then you need the cable details, frequency, and a few other things to make it a little more exiting (technical) to get the ultimate figure, you're after.

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Anonymous Poster
#5

Re: voltage drop and cable size calculation

08/05/2008 1:31 PM

aluminum or copper
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Anonymous Poster
#6

Re: voltage drop and cable size calculation

08/05/2008 1:33 PM

what is the voltage you are running
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Anonymous Poster (3); Isti80 (1); JohnDG (1); PWSlack (1)

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