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Anonymous Poster

Cable Sizing Formula

01/27/2011 4:24 AM

Dear Electrical Friends,

Would like to know the formula to be used for the cable sizing for DOL motors and Star-Delta Motors.

Thanks and warm regards
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Tornado
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#1

Re: Guest

01/27/2011 4:28 AM

Cable ampacity ≥ 1.25 x FLC of motor, regardless of starting method; plus other corrections that may need to be applied for voltage drop, cable bundling, ambient temperature, etc. It is not so much a calculation as several table look-ups with a decision tree.

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pnaban
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#3
In reply to #1

Re: Guest

01/28/2011 5:49 AM

But the rating of protective size(fuse/mcb/mccb) will be different.

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 pnaban
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PWSlack
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#2

Re: Guest

01/27/2011 5:19 AM

http://cr4.globalspec.com/search/sitesearch?do=show&sort=textmatchrank&srch=cable%20sizing&srchobjs=t%2Cc&fs=12&order=asc

<sigh>

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