HOW TO SIZE A CABLE !

An electrical cable is an assembly of one or more wires running side by side or bundled, which is used to carry electric current.
Cables are used to connect two or more electrical devices, thus allowing transfer of electricity from one device to the other.
Why is it important to size a cable correctly?
If the cable is undersized it will be inadequate to carry the rated load current, resulting in heating of cable and in extreme cases burning of the cable.
It must be ensured to provide a load with a suitable voltage i.e. with minimum voltage drop. Cable with a small diameter will have a higher resistance and will cause more voltage drop across the cable.
If the cable is oversized, it will require more material to be used in its construction, causing the cable to become expensive.
Larger pathway/Cable trays may be required, if multiple oversized cables are running parallelly.
Cable tray filling may become an issue if we are installing an oversized cable on a tightly loaded cable tray.
We may face termination issues at equipment terminal in case an oversized cable is selected as equipment terminal may not be adequate (as terminals have a limit on maximum cable size that can be terminated).
Installation of cables may be an issue as oversized cables will have larger bending ratio.
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[@ankitmehta2325]

Excellent explanation. Thank you sir

[@Deoriamauryajaivinaykumar]

Amazingly explained Sir

[@subhu7451]

Sir your content is very helpful 🙏🏻 pls make a video on selection of earthing 🙏

[@اللهمصلعلىمحمدوآلمحمد-ص8ظ]

Very precious video.
I was hoping to see a summary at the end of this video and other videos.

[@Fact-fusion86]

Your all video is very valuable to electrical Engineer specially working in oil &gas, power, metal industry etc.
Please upload the video for switchgear sizing, earthing and lightning calculation, EDG sizing etc

[@vishalv5204]

very helpful videos, please make videos of generators and ups sizing...

[@theelectricalsolutionschan1095]

Thanks. Glad that you found the video useful. Videos on the above topics are under preparation and will be uploaded shortly.

[@ganapathypv6587]

I have returning to detailing in electrical engineering after a gap of 10 years. The concept is very well explained . I able to recollect my subject. Thank you so much

[@theelectricalsolutionschan1095]

Thanks. Glad that you found the video useful.

[@PrasantaDas-hi8of]

Sir kindly a video on generator sizing with largest motor starting

[@theelectricalsolutionschan1095]

Thanks for your comment. Video on Generator sizing is planned and will be uploaded shortly.

[@uuday9093]

A very helpful video for students and people working in core engg.

[@theelectricalsolutionschan1095]

Many many thanks!

[@ismaillashari7597]

Thank you so much for such a great help . Please upload more such valuable videos

[@theelectricalsolutionschan1095]

Thank you, I will

[@islamknowledge5183]

how we can calculate Sc current which is 40000A

[@ThushanMadu-g5h]

Thanks for the great explanation. Is this method the same as the low-voltage cable selection?

[@sonalipalekar2260]

Thank You Sir. This was very helpful. Thanks a lot. Please make more videos

[@theelectricalsolutionschan1095]

Thank you. Glad that it was helpful. Please keep visiting the channel for more such videos on Electrical topics.

[@abubakarali8850]

Sir this video is also extraordinary wow...simle language full of quality ...sir plz make more videos on t/f and circuit breaker...I'M shocked u r not getting views and subscribers...but except this if u make more videos we will glad to you thanks 🇮🇳 sir u have very deep knowledge on calculation plz make videos for us plz

[@theelectricalsolutionschan1095]

Thanks for your comments. Glad that you found it useful. Please do subscribe to my channel and share with your friends. Videos on other topics are under preparation and will be uploaded shortly.

[@anandanthanigachalam1313]

Super explanation....post more videos.

[@theelectricalsolutionschan1095]

Thanks. Glad that you found the video useful. Please let me know your comments on my other videos. Please do subscribe to my channel and share with your friends. Videos on the other topics will be uploaded shortly.

[@vinayshrisahay]

Amazingly explained

[@theelectricalsolutionschan1095]

Glad you think so!

[@nareshdadi1441]

A very clear explanation, many many thanks for your efforts and concepts.
Could you please explain how to size a Battery bank based on this battery load profile..
Also sizing of an Emergency Diesel generator.
Also what are the protection systems used for transformer protection and busbar protection..

[@theelectricalsolutionschan1095]

Thanks. Glad that you found the video useful. Please let me know your comments on my other videos. Please do subscribe to my channel and share with your friends. Videos on the above topics are under preparation and will be uploaded shortly.

[@vinayshrisahay]

Very helpful 👍👍..need more info like this

[@theelectricalsolutionschan1095]

Glad to hear that

[@mayankpandey812]

but sir in ib industry officers randomly select cable according to current rating they do not bother about what you said

[@theelectricalsolutionschan1095]

Thanks for your comment. Sometimes engineers do select cables based on experience but these are normally based on an earlier selected able for similar load or length of cable, leading them to select similar size cable. However, if one is not careful it may lead to oversizing or under-sizing of the cable.

[@ranjan1436]

Is the LT cable sized using the same process? please make a video of LT cable sizing.

[@theelectricalsolutionschan1095]

Yes, LV cable sizing also follows the same process.

[@ranjan1436]

You have considered 6 cables during de-rating factor K2 from the table,(0.74), during Vd calculation you have taken a number of cables,n=1?

[@theelectricalsolutionschan1095]

Thanks for your comment. The 6 cables mentioned are cables for various feeders laid side by side and not for a single feeder. Hope this clarifies the issue.

[@mabushareef8880]

Sir please we want more examples in cable size chooses

[@theelectricalsolutionschan1095]

Thanks for your comment. I will try to post some more examples in future.

[@kv848]

Waiting for your new videos

[@theelectricalsolutionschan1095]

Working on it !!

[@kv848]

Sir.. Are you working on any industry or contracting company

[@theelectricalsolutionschan1095]

I work in Oil & Gas Industry

[@nagarajans8988]

Make EARTHING video