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# Selection Of MCCB, ELCB For Main-Branch Circuit (MS Excel Spreadsheet)

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## Selection of main and branch circuit breakers

• Size and type of main MCCB, RCCB and ELCB for continuous and non-continuous load
• Sensitivity of MCCB, RCCB and ELCB
• Size of cable
• Size and type of sub-circuit MCCB and MCB for continious and non-continious load
• Main and branch circuit current.

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1. Chunyu Cao
Oct 31, 2023

2. Engr. Biswas Alokesh
Oct 08, 2023

3. jose antonio salazar hidalgo
Nov 21, 2021

Hello
I would like to know how the cable selection works because, for example, for a motor load current of 180.4 Amp, and selecting a 2.5 mm2 cable in the drop-down cell, it is indicated that this cable size is OK (green color ) with a maximum length of 8 meters
it is impossible that this size of cable can support this load
For all the above, I would like to know if I am misusing this spreadsheet
Best regards, thank you in advance and I look forward to your response.

4. Bhargav Solanki
Aug 02, 2021

• Mayank Shukla
Mar 23, 2022

Working, full all information for corresponding fields

5. GAN SAIK NGAI
Apr 14, 2021

Dear Sir,
Your programs are useful unless we can fully understand the actual derivations i.e the formulae in the respective cells. However, most of your formulae in the respective cells are locked with password. Thus, rendered your program ineffective. This is the main reason

1. Could you let me know how do I unlock your passwords
2. If there is any cost involved, please let me know:
a) The process
b) The cost
c) What are my other benefits
d) What are the eligible duration

Regards,
(Mr. Gan Saik Ngai)

6. Mahesh Bende
Sep 26, 2020

Im a Electrical Engineer.I found your site very helpfull and has very useful contents.

7. PARTHA MUKHERJEE
Sep 24, 2020

DEAR SIR,

CAN YOU PLEASE SUGGEST A BOOK WHEREIN I CAN GET ALL THE IMPORTANT FORMULAE FOR ELECTRICAL ENGINEERING DESIGN CALCULATIONS READY HAND FOR PROJECT ENGINEERING RELATED TO ELECTRICAL SYSTEM DESIGN.
I AM A BE ELECTRICAL ENGINEER PRESENTLY RETIRED AGED 67 YEARS HAVING PUT UP AN INDUSTRIAL EXPERIENCE IN PROJECTS FOR 38 YEARS.
THANKS.
PARTHA

8. Zarni Thein
Sep 24, 2020

Thanks a lot for your sharing.

9. JOEL SONGANO
Sep 24, 2020

Very Nice.

How to increase the wire size?

10. Julio Abel Otárola Luna
Sep 23, 2020

It is a very good tool for the development of electrical circuits.

Thanks.

11. Ayappa Shetty
Jun 03, 2020

Im a Electrical Engineer.I found your site very helpfull and has very useful contents.

12. James Khalil
Oct 02, 2019

1. You should not include FUR (Future) load when sizing Over Current Protection Device (OCPD) for a specific load. The size of the OCPD should Be to protect the current load, otherwise the OCPD is NOT protected.

2. the NEC FLA of motor loads are HP driven and not KVA driven. Also the circuit trip amps can be up to 250% of the FLA. see NEC Table 430-250

13. Debmalya Dasgupta
Sep 27, 2019

Hi Jignesh,
I am working in a project where there are 12 nos. LV (415V) motors fed from MCC located about 1.1kM away from the motors. There are LCS located near the motors.understand from another project that in such long distance cases, when a stop signal is given from LCS, the contactor remains picked up due to the stored energy due to cable capacitance. Kindly advise some mitigation measures in this kind of situation to avoid mal-operation.
Regards
Debmalya

14. Abdelkawy Almasry
Sep 26, 2019

Really its very excellent and good explanation.

15. biji mathew
Jul 01, 2018

useless … the spreadsheet is not working ….

Mar 26, 2017

hi.pleaze pass???

17. Roman Bogdanov
Dec 29, 2016

Hi, How I can get a password for datasheets?

18. Chanh
Aug 25, 2016

I don’t understand some symbol in calculator spreadsheet. Would you like to send me a table for these symbol. I hope your reply soon.
Thanks and best regards.

19. Dharmendra
May 21, 2016

Sir,

The Selection of MCCB spreadsheet I can not select more than 120 sq mm cable size , so please update this sheet for other size of cable

20. Ala Sharief
May 14, 2016

The excel file shown above is not calculating well for cable selection , i make test for 3 phase load with current 474 A , and i set cable size 10 mm^2 and excel sheet still give that cable design is O.K. ??!!!!

21. ahmed abozied
Feb 20, 2016

pleas how to open XLS file ,iam try do not open

22. Hor Chin EK
Oct 14, 2015

23. gaspar
Aug 25, 2015

can i have the password plz? ty

24. jose
Jul 23, 2015

tripping amp rating is wrong no decimal point ..
overall good work..

25. kishore
Aug 11, 2014

Sir, trying to work with the XL, can’t access, it’s pass word protected,

26. Kelvin Wong
Jul 21, 2014

Hi,

I have downloaded this excel worksheet but I cannot access to it as it is being protected by a password can I have the password so I can start to use this excel work sheet?

27. NPT Châu
Jun 04, 2014

28. Abdul Wahid
Jun 03, 2014

Thanks alot

29. sudhir
Mar 27, 2014

30. Patrick Weerasinghe
Feb 10, 2014

I down loaded the XL on MCCB selection but could not use as the message comes that it is write protected

31. henry02
Oct 14, 2013

Thanks a lots. Excellent !!!

32. nmr
Jun 17, 2013

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33. Edvard
Nov 27, 2011

I agree, excellent explanation.

34. Eagle2011
Nov 27, 2011

tnx , they are very useful