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# Cable Size Calculation Spreadsheet

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## Calculations //

### Based On Motor Horse Power HP and Specified Current

Input data: Motor voltage (V L-L), Motor horsepower, Cable Temperature Rating (Â°C), Ambient Temperature (Â°C), Cable Length (ft) and Acceptable Voltage Drop (%).

Calculated Values: Operating Current (A), 125% Current per NEC (A), “Zero Length” Cable Size, Acceptable Voltage Drop (V), Actual Voltage Drop (V) and Actual Voltage Drop (%).

### Note//

Conductor ampacities are based on NEC 2008, Table 310.16 (Not more than 3 current carrying conductors in racewary).

 Software: Cable Size Calculations – Based On Motor Horse Power HP and Specified Current Version: – Developer: – Size: 73.5 kB Price: – Download: Here » Get EEP Membership | Video Courses | Download Updates

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### 41 Comments

1. Feliciano Sambo
Mar 20, 2020

Hi, could you please send me the Cable Size Calculation Spreadsheet?

2. Dilip
Aug 31, 2019

How to calculate neutral conductor size of 1000 kva and 2000 kva dry type distribution transformer

• Afana
Oct 10, 2019

How to calculate neutral conductor size of 1000 kva and 2000 kva dry type distribution transformer

3. Vairamuthu
Aug 26, 2019

dear sir how can we calculate the voltage drop, any formula available for that.

4. Sojimon Varghese
Jul 27, 2019

Please give me the formula of cable size calculation
In 3 phase and single phase

5. Sojimon Varghese
Jul 27, 2019

Please give me the formula of cable size calculation formula

6. Anil Kumar dorby
Apr 21, 2019

How we calculate electrical load in amp single phase equipment 10000 Watt, three phase equipment 2000 watt. So total load?
What size cable required

7. N.K.Sharma
Feb 18, 2019

Nice information provided by you.,sir really helpful. Thanks

8. MANIKANDAN SEKAR
Dec 04, 2018

EASSY WAY TO CALCULATE COPPPER CABLE SIZE AS PER AMPS(MOTOR FULL LOAD)

FOR EX: 10 HP MOTOR

3 PHASE MOTOR CURRENT DRAWS 1.25A/HP
10 HP MOTOR FULL LOAD AMPS (1.4*10)=14A
=14+(1.25*10HP)
= 26A
1SQ MM CABLE TAKING AMPS =6A
=26/6=4.33
10 HP CABLE SIZE = 4 SQ MM

9. bhargav
Jun 16, 2018

how to calculate cable size for EOT crane’s cable.
i.e. Motor KW:15, duty:S4, 150st/hr, 3 phase, 415V cable length 25 mtr(Festoon-Trailing cable) .
thanking you

10. Shivam singh
Mar 31, 2018

Hii Sir ,

I am confused in Three phase wire size calculation please let me know exact formula for three phase wire size calculation with multicore and single core cable.
For example Load Current – 45 A , Voltage drop – 3 %, Cable Lenght -10 Meter,
Please tell me how to calculate 4-Core Copper cable size for that ? Please do needful
Thanks

• Karthi
Jun 05, 2018

You should use 25 sq mm copper wire 4 core is enough

11. mustafa
May 30, 2017

hi
lwant aske you about how calculate cable size section if it wase almunium or copper
thank yoy so much

12. Md. Keafayet Ullah
Apr 18, 2017

How can I use cable size for 440 kW load? Please suggest Me?

13. Ram Karan Sharma
Jan 21, 2017

I want to know cable size. I have to install a DG set of 40 KVA capacity and length of cabling about 2000M having one outlet about 4KVA at every 10 M

14. uduman
Mar 11, 2016

How can calculations electrical load schedule please send me with examples

15. Shaker Ahmad
Dec 21, 2015

Very nice

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