How to select cable size? // AC cable size & Voltage drop calculation. // AC cable design for load.
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- เผยแพร่เมื่อ 28 ต.ค. 2021
- How to select cable size? // AC Cable size & Voltage drop calculation. // AC cable design for load.
Principles of Cable Sizing :-
current carrying capacity, voltage drop, short circuit.
Cables are often the last component considered during system design even if in many situations cables are the true system’s lifeline: if a cable fails, the entire system may stop. Cable reliability is therefore extremely important, then a cable system should be engineered to last the life of the system in the installation environment for the required application. Environments in which cable systems are being used are often challenging, as extreme temperatures, chemicals, abrasion, and extensive flexing. These variables have a direct impact on the materials used for cable insulation and jacketing as well as the construction of the cable. Using a systematic approach will help ensure that designer select the best cable for the required application in the installation environment. This lessons will provide students main guidelines for perform this approach.
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Video link -
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4. What is Reactive Power ? // Why Industries Power Factory become poor after installing Solar! - lnkd.in/ei8S_d_m
5. What is CT? What is CT Ratio? How to select CT? - lnkd.in/eCkNRTtZ
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Excellent information
Great vedio sir, I have'nt seen this type of content on this particular topic in which any industry can actually calculate their cable size and will no longer be dependent on assumptions.
Thanks 🙏
Helpful videos for Industrial projects
Thank you
You are welcome
Superb bro u r awesome keep it up n thank u soo much ❤
Thankyou bhaiya
I’m a working professional nd I’m really suffering alot in corporate world because no one is ready to tell me
😊
Can feel you... seniors do tell but bcoz of work pressure, most of the times they're rude🙃 but that's how we learn.
@@tejasshirke1267 Brother the values which i get from soil report is in ohm.meter for example 87 ogm.meter, how i will convert it to Kelvin.meter/watt?
This video is very important every electrical field.
Thank you sir.
Many many thanks
Informative sir ❤
Thank you 🙏🏻
Very helpful video sir.... thanks
Most welcome
Thank you for the good information i think need to some more calculation like Derating Factor of Cable ?
Great❤❤
Gajab video
Proper explanation ; thank you for such good video.
Thanks 🙏
@@solarfacts4242 Thanks for your videos. Brother the values which i get from soil report is in ohm.meter for example 87 ogm.meter, how i will convert it to Kelvin.meter/watt?
well done sir,from long time need for such a good explanation..I LIKED UR VDO
Thank you so much 🙏🏻
Very very nice video Sirji
Thank you
Sir thanks. Very useful 😇😇
👍
Very nice Sir . keep up the good work Sir :)
Thanks 🙏🏻
Ap bht acha prhate ho aisi videos bnate rhee... Respect from pakistan
Thanks
@@solarfacts4242 Brother the values which i get from soil report is in ohm.meter for example 87 ogm.meter, how i will convert it to Kelvin.meter/watt?
Nice video
Thanks 🙏
Would the calculation be the same for the cable from Inverter to the LT panel?
Lot of thanks.....
thanks
Hi sir,fantastic explanation,kindly make video for current carrying capacity of particular armoured cables size(without knowing power) ,like 4 core 240 sqmm armoured cable.
Ok Good Topic thanks 🙏
@@solarfacts4242 bahi jaan 1000 & 100 kider sey aya?
Excellent video
thanks
Ok Thank you for detail video
Kindly requesting to provide details for Multiple cables running in ground
Multiple cables running in air through cable tray
ok i will make video on it
great video
Thanks for the visit
Good brother,.But to finalize cable, you must check the short circuit capacity of cable also...
yes
Good 😊❤
Thank you 🙏🏻
Good work
Thank you
One question I have is that for calculating full load current will the current be divided by k factor value or will it be multiplied by k factor value beacuse k factor is correction factor means it is derating the cable current depending on certain parameters so full load current should reduce and for that we should multiply the current by k factor. This is my assumption, please correct if I am wrong.
Thank you for the good information. I would like to know regarding the K ratings.. On which basis we should we take the K ratings.. I mean do we have any BIS Or ISI to prove.. If ask someone..
K ratings are given in evry company's Wire catelogue. You can find K rating as per your need
You can get this from manufacturer or for normal calculation I will share the link in the description
Thank you
As depth of cable ur selecting from chart 1050 Meter and that sqmm of cable how can we decide that 70 sqmm. after correction factor calculation only we can decide sqmm of cable on wht basis or consideration we are taking 70 sqmm before calculating correction factor
Hi bro in last while calculation of voltage drop you write 139 amp but while adding "k" factor this is 142 so what is correct ?
Sir it great please made single phase wire size selection
Ok sure I will
Dear Raman ji this is for aluminium cable or copper cable ? For both these same formula will be applicable or different if different formula then please tell
Same formula only values will change
i have a comments against your subject , final calculation which your apply instead of 1000 u r putting 100 , please clarified this , and over all v.good
That is 1000 there is written error
Very helpful videos sir
Thanks and welcome
100 kider sey aya?
@solar Facts thanks a lot for this video. can u share the book name about k factors table u have used in this calculation???
K factors are given by manufacturing company. You can follow them
That you can get from the manufacturer whose cable you are going to use
Good explain
thank you
Source ? Reference Book or any National Indian Standard ?
Hey bro! Did you got any reference book or standard? If yes can you share it to me and if you are experienced in this field can you tell I should go by this video?
Sir kindly make a video of wire size calculation for normal house wiring and what point need to keep in mind whenever we will go for solar in future
ok sure thank you
👍👍👍👍
Thanks 😊
Aoa dear your video is very helpful... Kindly give just one answer...
If I use the 4 core 70mmsq then it's means that number of cable run = 1...or 4
1 run 4 core
Voltage drop me system full load current lena tha ya nahi?
Some industry is maintaining a power factor of 0.95 and if we are to choose wire size then we take solar load into consideration. e.g. if we have a 50 kw solar project then Solar load will be at a max not more than 50kw and power factor will be maintained. So can we chose the wire size on that basis or we will have to consider PF as 0.8 for all cases. Plz clear.
generally we consider power factor 0.80 for the wire calculation
Regarding voltage drop calculation Are you sure about considering current value 139.12 amps . Why not used current rating 142.28 ?
Let me check
Great vedio sir. How can we put values of k factor like air temp.
There is a sheet from where you can find out the values of K
Sir 3/3.5/4 core cable ke liye kis size ka gland or holesaw cutter use hota iski info share kariye
I will make one video on it
how did you select 70sqmm=164Amp
There are different type of gauge of wire available in market in same category like 2.5mm wire different companies has different gauge you don't even mention a single time about gauge i want some information about it how can i contact you
sir voltage drop me 100/1000 kiss chiz k liye hai?
Plz sir relay setting calculation per video banaye
Sir, Inverter always work on unity factor, so why you. Have consider .8 PF
Can you explain ?
Inverter power factor is unity but as per my consideration power factor always depends on load that why I have take 0.8
How derating factor to be devided instead of multiplying..can you clarify..
I can't understand value of jsinφ because you take R = 0.6 and sinφ=0.6 both reading value are same so I confused. which parameter value putting in the place of sinφ
Cos @ = 0.8
You can calculate @
Then when you will do sin @ you will get value = 0.6
Why you taken current as 139 while calculating voltage drop ???
Can we use simple polycab 4sqmm ac wire in 3kw solar ongrid system?
Yes
But you have to check cable length
@@solarfacts4242 90 ft. Approximately
Sir, cable selection me short circuit current nahi consider karte hai kya ?
Karte hai
Will make a separate video
Good endeavor. But, to calculate voltage drop, why current be multiplied by root three? In star mode, phase voltage equals line voltage.
No
Sir in delta phase voltage is equal to line voltage
Right. My mistake. In star mode, phase current equals line current.But here we are calculating voltage drop making use of current. Is it still required to be multiplied by root three?
Sir mujhe 1.5ton non inverter technology 4 AC chalana he mcb box se electricity pole Tak main line 25 mtr Lambi Ho Jayegi to bataiye 2 core aluminium wire kitne mm ka lagaen
Replied on phone 😊
wher u apply value in formula there please clarified mean where divided the value u r put 415 x1 x100 instead of 1000
That is 1000 there is written error
Hello sir....generator voltage too low ... inverters main issue hai ..?
You have to keep the voltage In range of inverter
Sir fault level pr cable size pr kya effect h please elaborate the fualt level effect
Yes will make a separate video on it
Sir in this video you didn't calculate power loss.
So can you tell or describe the power loss finding according to this calculation?
That will be a separate video
please explain cable size of 300kw load
For Home wiring we also find voltage drop?
Yes you can find the voltage drop for home also
Same method?
bhai iska internation rules reference de sakte ho kya?? ye rules kaha se liya apne please send us reference
Ok
How can i contact you
Which cable Cu or Al for 95 sq.mm ?
Al
Respected sir,
Jo apne 6% ka loss calculate kiya end me wo kitni length par jakay hoga or length ko formula me kese put krengy pls sir help
this will happen at 200 Meter
already mention in Video
Plz share the link of the Tables which you are used .
Sure
Why you consider current valve 139 intead of 142.12 amp ? I think there is some mistakes?
It is because the full.load current flow is 139 amp not 142amp.
Sir, why Value of k1,k4,k6,k7 are not considered ??
i have considered 1
Sir end mea jo ap nay calculation keya hy 6.26" ye answer nai ah rah kindly explain me
Ya kisi Bhai ko pata ho kindly tell me
Ye aluminium cable ka hai ya copper cable ka
Al
Please share data sheet of current carrying capacity of cable
You can download for google it is easily available
why have you taken 139 A in the voltage drop calculation whereas the current after the K factor is 142A?
That is typo mistake
Sorry
Sir 4 core cable ya sirf single core cable
You can calculate for both
Sir 4 core cable me nutral current kitna flow karega or agr humara system pura sirf unbalance ho 3phase and nutral ko hum sirf single phase and nutral use karrahe ho to kya nutral wire 3 phase wire ka sum hoga
In ac cable voltage drop formula you did you divide it by 1000 as per formula. Bcs you wrote 415x100
you can check the calculation
How to find K1= cable in Air.
Fault current consideration?
Yes should do we will make a video where we will do that also
In voltage drop what us sin fai and explain and in formula 1000 but in numerical 100 please share original formula
K6 ka value aapne consider ni kiya hai. What about that?
By default it is 1
Sir can u send selection chart of cable
Sure
Correction : for voltage drop
It is( 1.732*I*R*L*100) / V3ph * NO.of Run * 1000
Can u please explain why u choose 70 sqmm directly and started selectin gparameters as per that , u didn't give any contex or explanation over there , 9.47 minutes
This was random selection just to check whether it is ok or not
I will also share one video where you can find the calculation for the cross section of wire
@Solar Facts : Dear sir i think you mis calculated current in voltage drop equation. Value for current should be 142.28 Amp as per my thinking. Please correct me if i am wrong.
Yes there is a calculation error at the last
Why using 1.732x somexcable length x 100...in this why multiple with 100 ??
This is the formula
I have check from where 100 is coming in formula
Tnx ji n I have gifted you check plz
Thank You
You took sin& =0.6 Can you pls explain how
We know cos @ = 0.8 from here you can get @ value then you can calculate sin @
@@solarfacts4242
Didn't get calculation
Cos(@) suppose we put 0.8 then value get 0.99
Sin(0.99)=0.0172
LAST Calculation m 100 likha 1000 ki jgah,, baki thek h
That written by mistake
At 9:48. Jb hme cable size malum hi ni.. to apne 70 sqmm cable q consider ki...y to champu bna rhe h ap
That I have consider just to calculate you can put other cable data then you will find whether you need to increase to increase the cross-section or decrease the cross-section of cable as per answer
Why u used 139 A insted of 142 A .
U have not mentioned cable size in formula so how I know 70 sq mm is wrong
We have use 142 amp considering K- Factor - 0.9667
Now you have to match the current with cable data sheet which cable is able to handle this current accordingly we select the cable
ANY ENGLISH TRANSALTION ?
Will do that
70 sqmm cable size kahan se aa gya 😂
I think below calculator is wrong
Ok
Don’t go through calculation only fallow steps
Samaj ni aya k factor tu bilkul ni
Ooh sorry
Electrical Engineering portal 😂😂😂😂 Dont just copy stuff