One of the best teaching methodology. Hats off Dear friend. Soman SEE/ ECG QATAR. Remember my college days in 1990 and subsequent work environments. Thanks and my best wishes.
You have gone in depth to explain cable selection and voltage drop factors. I would like to see how you arrive at the MCB, RCCB, and MCCB selection. This is a very important topic that might have escaped your attention. Please do let me know what are the limits for such devices.
I am just stared recently circuit breakers topic .therefore please check the videos . Distribution board calculation also I explain the breaker topic Further in detail selection I will make a video soon
You are welcome , thanks for your feedback . Further I request you please share the channel in your contacts . It will help others . If you need any particular video which I have to make please suggest the topic.
Thanks eng asif for clear understanding Can you make one video for load calculation for ( power, light, AC, ventilation, services equipment) In warehouse applications
I done this video check power system design video there I can explain in detail . Further I will make a video soon about full home design . For warehouse give me which type of warehouse need
very well explained. Sir do you have another video in which total load calculation is explained in a little more detail ? Can i have the slides and excel sheet of this video ?
have a look below videos th-cam.com/video/p7FKAL9cItM/w-d-xo.html th-cam.com/video/hTYvqkj3vbQ/w-d-xo.html th-cam.com/video/glPML24xvHg/w-d-xo.html i am making a book on these topics will share with you all very soon please stay tune.
Hello brother...much appreciated for your effort...nd i have a dbt..after load current calculations we need to select breaker current with future 20% additional.ie, In = Ic x 1.2(20%)...kindly enlighten me if iam wronG
You can watch at 11 .37 i explain grouping factor i selected grouping factor 0.82 at 50 deg ambient temperature as per the BS7671 check i write values at the same time for other temperatures
your total load 160KW , you power should be 3phase and generally for this load transformer not recommended. may i know which country these details belongs (different country different standards , however your breaker rating 350A . further any clarification please let me know.
Hello sir, my question is for 100 kW u choose 70mm2 it should be 150mm and I went through the comment u ask to check the next chart but the chart rating is 600/1000v. For 4 kw u choose 6mm is correct
As per catalogue 70mm2 xple you armoured cable current rating up to 265 A ,please check any cable catalogue. if you required the cable catalogue please send email to electricalstuff.mep@gmail.com . will share with you catalogue page . and further please watch this video to know more about the cable calculations :th-cam.com/video/50wRN2z00AM/w-d-xo.html Thanks for watching ,please share your feedback so i feel happy to assist in better way .
Submersible water pump 1. Voltage drop 2.protective device rating 3.maxinum permisable staring current as per EWR They are giving Length, 4 core armoured xlpe cable, 60HP, 400V full load P.F 0.85
i didn't understand ,do you need above 1,2,3 calculation ? . i suggest try to do yourself convert HP to KW then try to find the full load current from that protective device .can you abbreviate EWR .
You have not explained BS7671 Standard and grouping factor you randomly selected 0.82 why you selected 0.82 Sir and what ambient temperature you have considered??
You can watch at 11 .37 i explain grouping factor i selected grouping factor 0.82 at 50 deg ambient temperature as per the BS7671 check i write values at the same time for other temperatures
As we are using XLPE with thermosetting temperature of 90 degree Celsius, we will be using the same column (of Table 4B1). In BS 7671 Table 4B1, it is mentioned as Rating factor (Ca), but why in this video "grouping factor" is described throughout, 10:53 , kindly solve this doubt
As per regulations voltage drop shall not more than 4%of the supply voltage . Our 3 pH main supply voltage is 400 then 4% of the main supply we can write as 400 ×4 / 100 = 16v So we can say that out voltage drop shall not be more than 16v for 3 phase
Watch my other videos I explain details further short circuit calculation I will make a video before to understand I want to make few other videos to get idea .
Hi ashmitha Thanks for watching and your question is valid At 25.38min you can find manufacturer cable chart . For 243 A cable size 70mm2 . The next I post a chart it is thumb rule based. Where you can get cable size 120 mm2 . For cable calculation many factors and methods are available . Length installation methods so if you can follow thumb rule for general case . If you have available all factors length and installation methods then follow the first method you can find calculation process at 22min on words . Further if you have clarification please feel free to ask . But cable calculation procedure which i explain is correct need to find cable current from chart itself .
Hi ashmitha further 243A is cable current . Not load current Next chart is for load current and cable charts ( thumb rule based ) So For our case load current 200A For 200A cable size is 95a The same I mention In my video .
There is two parts we can consider 1- Total load based on transformer selection ex: 1000 KVA transformer you can load upto 800KW so you can select your requirement accordingly 2- Calculate all load in building then choose your transformer . I hope you understand further i make a simple concept of load and schematic diagram in this video th-cam.com/video/glPML24xvHg/w-d-xo.html . further any doubts please let me know Thanks for watching
core is nothing but conductor size , conductor size depend upon the current caring capacity ,generally we use 1ph and 3ph supply . in this 1 ph supply means one phase ,neutral & earth . in this we can use 3 core cables or three individual single core wires can be use to 1 phase power supply 3phase means 3 phase wires and one neutral , one earth so we have 4 core cables to use for this purpose and earth separate or we can go for 5 core cables ( generally not recommended because of cost ) . 3.5 core where three phase are same size of conductor and neutral conductor size is half that is the reason it called as 3.5 core . i did not use this cable i hope you understand this concept. further any doubts please let me know
Sir I can't understand how you select 95sq.mm instead of 70sq.mm.because from the calculations we will get voltage drop under 4%.so why should we select 95sq.mmcable.could you please clarify that?
Yes cable size is 70 is enough But as per regulations 4 percent through out from mdb to final load This cable is feeding from smdb Therefore we consider 2 % Voltage drop hence we choose 95 cable . If the cable feeding directly from the mdb then we can choose 70mm cable. I
Sir I have a doubt 1.Capacity standby generator ? 2.select the required main breaker typer and rating of change over switch They are giving power and diversified factor. Please sir reply me
i am sorry i didn't understand the question , do you mean main breaker type & change over switch is calculate on diversified load or total connected load ?
Select the capacity of standby generator is required to feed critical load 122KW and diversified factor 0.9 sir Calculation please tell me sir Q)select the required main breaker type and rating of the change over switch ????
One of the best teaching methodology. Hats off Dear friend. Soman SEE/ ECG QATAR. Remember my college days in 1990 and subsequent work environments. Thanks and my best wishes.
Thank you so much for great words .
You words make me feel more responsibility .😊
Very well explained explained according to gulf conditions, u should have much more subscribers
Thank you
You have gone in depth to explain cable selection and voltage drop factors. I would like to see how you arrive at the MCB, RCCB, and MCCB selection. This is a very important topic that might have escaped your attention. Please do let me know what are the limits for such devices.
I am just stared recently circuit breakers topic .therefore please check the videos .
Distribution board calculation also I explain the breaker topic
Further in detail selection I will make a video soon
Good explanation👍 👍
Thanks for liking
Am from ethiopia am kedir sedik I would like learn at onlain and i have attended your teaching i like very much keep it up ,
Thanks and welcome
Great lecture.. lot of things got from this. Very thankz....
@@thushanmadusanka8890 you are welcome
Please many informative videos available .
@@ElectricalStuff noted.. need to study all... thankx..
Thank u sir....this is very helpful video ....
Thanks Yadav for your support
Awesome explanation Asif Bhai, please upload next video . Thanks
Thanks
Thank you for this video. I really thankful to your effort since there are not enough videos reg electric design in youtube.
You are welcome , thanks for your feedback . Further I request you please share the channel in your contacts . It will help others . If you need any particular video which I have to make please suggest the topic.
From calculating 243.9A, how did you select 4c x 70mm sqd?
From manufacturing cable chart
Thanks eng asif for clear understanding
Can you make one video for load calculation for ( power, light, AC, ventilation, services equipment)
In warehouse applications
I done this video check power system design video there I can explain in detail .
Further I will make a video soon about full home design .
For warehouse give me which type of warehouse need
Webinar 1 check electrical engineer roles and responsibilities
Thank you so much for your support
And your feedback
@@ElectricalStuff where's the webinr 1 ? sir plz
@@maazullah3173 th-cam.com/video/vP521hcoONY/w-d-xo.html here the link
what to refer in normal condition in cable ampere rating .is it ---installed in air or direct in ground or in ducts ,which one to choose
In side buildings then choose air ,outside underground service then choose ground
very well explained. Sir do you have another video in which total load calculation is explained in a little more detail ? Can i have the slides and excel sheet of this video ?
have a look below videos
th-cam.com/video/p7FKAL9cItM/w-d-xo.html
th-cam.com/video/hTYvqkj3vbQ/w-d-xo.html
th-cam.com/video/glPML24xvHg/w-d-xo.html
i am making a book on these topics will share with you all very soon please stay tune.
Thnx sir
How I get your presentation pls
Sorry presentation can't shared due to copy rights
issues ..
Brother kindly upload videos on transformer sizing and panel selection on distribution side.
sure next video on Distribution board sizing and will make transformer sizing too . Thanks for watching .
Hello brother...much appreciated for your effort...nd i have a dbt..after load current calculations we need to select breaker current with future 20% additional.ie, In = Ic x 1.2(20%)...kindly enlighten me if iam wronG
Thanks for your words
yes your are correct , breaker current can be calculated different standards mostly as i mentioned in the video.
Long time i was searching like this video bro
Thank you so much
Please Watch other videos for sure you will like
I didnt understand how you select grouping factor for ID Calculation why you take 0.82 ??? please explain
You can watch at 11 .37 i explain grouping factor
i selected grouping factor 0.82 at 50 deg ambient temperature as per the BS7671
check i write values at the same time for other temperatures
Sir, I have 60 KW 3phase load & 100 kw 1phase load. What will be the total load to select a transformer?
your total load 160KW , you power should be 3phase and generally for this load transformer not recommended.
may i know which country these details belongs (different country different standards , however your breaker rating 350A . further any clarification please let me know.
Hello sir, my question is for 100 kW u choose 70mm2 it should be 150mm and I went through the comment u ask to check the next chart but the chart rating is 600/1000v. For 4 kw u choose 6mm is correct
XLPE cables are rated 600/1000v
further can you please share detailed calculation to achieve 150 cable size .
How you select 4c×70 mm2 cable for 243A because the cable chart shows 4c×150 mm2 for 243A?
As per catalogue 70mm2 xple you armoured cable current rating up to 265 A ,please check any cable catalogue.
if you required the cable catalogue please send email to electricalstuff.mep@gmail.com . will share with you catalogue page .
and further please watch this video to know more about the cable calculations
:th-cam.com/video/50wRN2z00AM/w-d-xo.html
Thanks for watching ,please share your feedback so i feel happy to assist in better way .
Sir, when is your next live Webinar. I would like to join
Currently I am making TH-cam video because of timing issue .
Please check my other video to understand/refresh concepts.
Submersible water pump
1. Voltage drop
2.protective device rating
3.maxinum permisable staring current as per EWR
They are giving Length, 4 core armoured xlpe cable, 60HP, 400V full load P.F 0.85
i didn't understand ,do you need above 1,2,3 calculation ? . i suggest try to do yourself convert HP to KW then try to find the full load current from that protective device .can you abbreviate EWR .
Thq sir
where to find webinar 1..........?
here is the link th-cam.com/video/vP521hcoONY/w-d-xo.html
❤
thanks
Hi can you add webinar 1 plz
Hi
Here is the webinar-1 link--
th-cam.com/video/vP521hcoONY/w-d-xo.html
Thanks for watching
So appreciative. Thank you so much
Thanks for your support
@@ElectricalStuff sir, is it possible you do a tutorial video in detail of Electrical Load schedule for building and Industrial application??
Sure which type of industry you want to do me a video
@@ElectricalStuff oil & gas industry
Sir, Shall I consider main circuit breaker based on total connected load or total demand load?
Depends on regulation by electricity board .
In Dubai tcl abudhabi tdl .
In practical my opinion breaker can choose TCL if you not comparice safety .
in uae what is the maximum load which can be carried by single phase
One ckt general for lighting load 2000w.
You have not explained BS7671 Standard and grouping factor you randomly selected 0.82 why you selected 0.82 Sir and what ambient temperature you have considered??
You can watch at 11 .37 i explain grouping factor
i selected grouping factor 0.82 at 50 deg ambient temperature as per the BS7671
check i write values at the same time for other temperatures
As we are using XLPE with thermosetting temperature of 90 degree Celsius, we will be using the same column (of Table 4B1). In BS 7671 Table 4B1, it is mentioned as Rating factor (Ca), but why in this video "grouping factor" is described throughout, 10:53 , kindly solve this doubt
Can you share details to electricalstuff.mep@gmail.com.
So that I can check reply .
Nicely explained
Thanks a lot keep watching for good stuff
Thank you sir.
Most welcome
Sir, please upload webinar 1 Session. Thank u
Hi Webinar 1 is roles and responsibilities of electrical engineer please watch the video
Can you tell me please vd=400x4/100,what is the formula
As per regulations voltage drop shall not more than 4%of the supply voltage . Our 3 pH main supply voltage is 400 then 4% of the main supply we can write as 400 ×4 / 100 = 16v
So we can say that out voltage drop shall not be more than 16v for 3 phase
Hope you understand
For voltage drop I make another detailed video please watch it .this available in my video section
Thanks for watching
Good day
For cable sizing ,only voltage drop calcution required or short circuit calculations also required specially in gulf countries ?? Please reply
Both required
Watch my other videos I explain details further short circuit calculation I will make a video before to understand I want to make few other videos to get idea .
according to chart for 243 amps the cable size is 120 mm2 but u said it is 70 mm2 ....how?
Hi ashmitha
Thanks for watching and your question is valid
At 25.38min you can find manufacturer cable chart . For 243 A cable size 70mm2 .
The next I post a chart it is thumb rule based. Where you can get cable size 120 mm2 .
For cable calculation many factors and methods are available . Length installation methods so if you can follow thumb rule for general case .
If you have available all factors length and installation methods then follow the first method you can find calculation process at 22min on words .
Further if you have clarification please feel free to ask .
But cable calculation procedure which i explain is correct need to find cable current from chart itself .
Hi ashmitha further
243A is cable current . Not load current
Next chart is for load current and cable charts ( thumb rule based )
So For our case load current 200A
For 200A cable size is 95a
The same I mention In my video .
What is the total connected load to be assumed in calculation for the building?
There is two parts we can consider
1- Total load based on transformer selection
ex: 1000 KVA transformer you can load upto 800KW so you can select your requirement accordingly
2- Calculate all load in building then choose your transformer .
I hope you understand further i make a simple concept of load and schematic diagram in this video th-cam.com/video/glPML24xvHg/w-d-xo.html
.
further any doubts please let me know
Thanks for watching
Thanks for watching ,please share your feedback so i feel happy to assist in better way .
Sir i have one doubt , please explain me that how we choose core, i mean in 3phase how to select cable core it may be 3core, 3.5 core and 4 core also?
core is nothing but conductor size , conductor size depend upon the current caring capacity ,generally we use 1ph and 3ph supply .
in this 1 ph supply means one phase ,neutral & earth .
in this we can use 3 core cables or three individual single core wires can be use to 1 phase power supply
3phase means 3 phase wires and one neutral , one earth
so we have 4 core cables to use for this purpose and earth separate or we can go for 5 core cables ( generally not recommended because of cost ) .
3.5 core where three phase are same size of conductor and neutral conductor size is half that is the reason it called as 3.5 core . i did not use this cable
i hope you understand this concept.
further any doubts please let me know
And above 400 Amps how cable is calculated
you need run 2 core cables , i make a details video in voltage drop calculations please check
U mess up in the second half ie load sch part , otherwise it could b great video
Thank you for your feedback
and I appreciate your feedback if you share details where to improve it will be very great full to improve my videos
Sir in cable size chart what is cpc
CPC nothing but earth conductor full form Circuit protective conductor
Sir I can't understand how you select 95sq.mm instead of 70sq.mm.because from the calculations we will get voltage drop under 4%.so why should we select 95sq.mmcable.could you please clarify that?
Yes cable size is 70 is enough
But as per regulations 4 percent through out from mdb to final load
This cable is feeding from smdb Therefore we consider 2 % Voltage drop hence we choose 95 cable .
If the cable feeding directly from the mdb then we can choose 70mm cable.
I
@@ElectricalStuff so 4% drop can only consider from mdb to final db.am am i correct?.
If it is from smdb to final dB we will consider drop as 2%.ok??
@@abdulshabeeb2806 yes
@@ElectricalStuff and one more dout sir.if this cable is used from mdb to smdb what will be the drop?is it 4% or 2%.then the cable size is 70 or 90?
@@abdulshabeeb2806 total drop 4% 2mdb to smdb smdb to final db 2
Capacitor bank??? how to find sir if they are giving 0.90 to 0.95
i will make a video on capacitor bank calculation
waiting for next video please
I am too busy with work soon start again for posting video
Share what you like to watch
Sir g if you are busy try to upload short videos... any how as you wish... but upload video must
your way of understanding is amazing
upload more videos related to electrical engineer as Gulf
Sir I have a doubt
1.Capacity standby generator ?
2.select the required main breaker typer and rating of change over switch
They are giving power and diversified factor.
Please sir reply me
i am sorry i didn't understand the question , do you mean main breaker type & change over switch is calculate on diversified load or total connected load ?
Select the capacity of standby generator is required to feed critical load 122KW and diversified factor 0.9 sir
Calculation please tell me sir
Q)select the required main breaker type and rating of the change over switch ????
Thq sir reply me
We have to calculate load
find out which is used main breaker
nice sir
Thanks
Thanks
You are welcome
😍😍😍😍
Thanks
helpful
Thanks. watch other videos it will helpful too
Share me your PDF and presentation 😊
Sorry can't shared Presentation due to copy right
issues
👍
Thank you
good day sir I have this project i am working on i need some help. which for communication can i contact you?
electricalstuff.mep@gmail.com