Dear all, Thank you very much your valuable vedio to improve my knowledge and it is very useful and simple.. ❤so i request another vedio for How to select proper earth cables size For different applications ?
I don't understand exactly. If you mean to say 5R is 5 circuits of 3 core cables. What exactly you want to know. Do u want to ask about grouping factor?
Didnt really understand that how at the beginning of calculations and without knowing the cable size, we can assume going for 2 multicore cables (after which we obtain 388A load current)
This is just supposition in order to calculate group factor. But if you keep foing calculation , you get a rough idea that how many per phase cables are needed to take the load. But proper way is to start by ond cable
The NEC (National Electrical Code) manual. I can look up the page numbers if you need em. The NEC is like 900 pages, but there are probably 20 pages you actually need to size any wire.
suppose m selecting breaker for 150kw so thats 270 amps and multiply by 1.25 is 337 breaker available size is 400 amps if we select xlpe running on perforated cable tray is 185 sqmm 3.5 core then how did u select 2c 95 sqmm please correct your calculation. if i consider 0.9 derating factor 337 x 0.9 thats 303 amps so while running current is 270 amps and cable could bear after derat 300 amps, dont spread wronmg calculation.
I just give an example to show effect of grouping factor. For that , I have to use 2 multi core or single core circuits per phase so that grouping factor applies. If I run single cable, viewers will not understand grouping factor. And by the way not all cables are selected according to the breakers
Then another very critical factor also applies which is enclosed in thermally insulated material. In that case the factor is o.5 if the total run of cable on TRS is 300mm
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One of the best tutorial on cable calculation
good
Dear all,
Thank you very much your valuable vedio to improve my knowledge and it is very useful and simple.. ❤so i request another vedio for How to select proper earth cables size For different applications ?
You are great sir 😊😊😊😊
Great work bro 👏
yes he truly deserve thumbs up
🎉 the best video
Thanks alot. Stay tuned and dont forget to subscribe plz
For the voltage drop calculation you should take load current which is actually drawn by the motor! Not the value used to rate your cable! Right?
Always find the values based on rated load as it keeps u safe
Excellent
Thanks
Great sound, great video ❤❤
hope to see step 5. thank so much for video
Thanks stay tuned and dont forget to subscribe
Great video information 👍 thank you for sharing your knowledge and experience 🇵🇭🫡
My pleasure. Stay tuned and dont forget to subscribe plz
Very good video
Thanks for appreciating
very informative. hardly any perfect video on this topic. i subscribed sir
Sir, sorry I have a question.
What is the no of runs in cable sizing.
Example:
5R/3.5C/240sqm/XLPE
1R/3.5C/240sqm/XLPE
thank you Sir
I don't understand exactly. If you mean to say 5R is 5 circuits of 3 core cables. What exactly you want to know. Do u want to ask about grouping factor?
@electricallectures
Thank you Sir.
Yes, I still confuse run cable example 5R, 3,R, 1R.
Please explain me Sir, your answer Will help me.
Thank you
Hi thanks for explain But I would like to know in which book you get this information if you let us know I’ll be great thanks again
This can be found in IEEE wiring regulations. If you have any specific observation regarding calculations you can ask
Didnt really understand that how at the beginning of calculations and without knowing the cable size, we can assume going for 2 multicore cables (after which we obtain 388A load current)
This is just supposition in order to calculate group factor. But if you keep foing calculation , you get a rough idea that how many per phase cables are needed to take the load. But proper way is to start by ond cable
I per cable = 194x1.25=242.5 right then how is it 238?
Yes you are right
anyone know what documentation or code he is getting the different tables from?
The NEC (National Electrical Code) manual. I can look up the page numbers if you need em. The NEC is like 900 pages, but there are probably 20 pages you actually need to size any wire.
Sir I need NEC book you have PDF copy of NEC book .@@ianhowe1449
0:52 Please can you further explain the group factor as well as the number of circuit
suppose m selecting breaker for 150kw so thats 270 amps and multiply by 1.25 is 337 breaker available size is 400 amps if we select xlpe running on perforated cable tray is 185 sqmm 3.5 core then how did u select 2c 95 sqmm please correct your calculation. if i consider 0.9 derating factor 337 x 0.9 thats 303 amps so while running current is 270 amps and cable could bear after derat 300 amps, dont spread wronmg calculation.
I just give an example to show effect of grouping factor. For that , I have to use 2 multi core or single core circuits per phase so that grouping factor applies. If I run single cable, viewers will not understand grouping factor. And by the way not all cables are selected according to the breakers
On which basis you have taken two multi core cable per phase?
Just for an example to tell that how grouping factor apply
From where we can get those tables or references?
You can get the tables from cable manufacturer or you can download BS 7671 : 2008 standard pdf
hello can you help me in cable sizing for building service
You can follow this video step by step as per your load
from which standard are the tables taken from?
Hi there
What size cable is required for a 3hp submersible pump 2200w 👍👍
2.5mmsq 3 core
from which standards are the tables taken from?
Tables are taken from cable manufacturers catalogue
Where can I get the tables from?
You can get these from any cable manufacturer catalogue
Nice 🙂
Thanks. Stay tuned and don't forget to subscribe plz
Thank you
Welcome. Stay tuned and don't forget to subscribe plz
@@electricallectures subscribed sir
What if the insulation is TRS?
Then another very critical factor also applies which is enclosed in thermally insulated material. In that case the factor is o.5 if the total run of cable on TRS is 300mm
@@electricallectures thank you!
also share this standard file of cables
Same calculation for aluminium armoured cables also.
Yes same method but values different
👌👌👍👍
Hi..3.17.. No of circuits/phase means or phase?
Means number of total cables for each phase
Every good
Thanks. Stay tuned and don't forget to subscribe plz
Nice
Thanks. Don't forget to subscribe plz
I watch this up untill the first formula come out, and then i be like nahhh formula is not my cup of tea
Some formula you must need rmto derive basic quantities
Plz give all tables pdf
You can find it in any cable manufacturer book
😊😊😊
Thanks
Subtitles are very disturbing to se the theory
Plz specify what is meant by disturbing. The calculation is clearly defined
@@electricallectures the guy probably left an automatic subtitle parameter opened lol
not really understand , i will do more practise
Do you have any excel in which we can do cable sizing as per NEC
NEC
?
What sir