## Calculations //

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

** Input data:** Motor voltage (V L-L), Motor horsepower, Cable Temperature Rating (°C), Ambient Temperature (°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 |

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73.5 kB |

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

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

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

Please give me the formula of cable size calculation

In 3 phase and single phase

Please give me the formula of cable size calculation formula

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

What size cable required

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

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

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

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

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

hi

lwant aske you about how calculate cable size section if it wase almunium or copper

thank yoy so much

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

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

How can calculations electrical load schedule please send me with examples

Very nice

Sir, Please Can You Explain How To Get Your Answer 19Volts Voltage Drop For 3 Phase And The resistive of copper & Conductivity Of Copper 58 And Aluminum 36 Including Voltage Drop And Voltage Line For Cables Sizing Formula Calculation

Your Most Favorable Response Is Highly Appreciated.

it doesnt have a calculation for 3-phase motor.

how to find out the Resistivity of copper

I want to know how to determine the sizes of almond cables used in the design of smdb panel

consider factors for duty of motor-S1,S2,S3…. and AC1,AC2,AC3 etc

Helpful data

three ph formula watt/440*1.5 and single phase watt/volt

Can you send me the calculation spreadsheet for ampere to Cable Size Calculations – Specified Current.with V L-L = 220V and VL-L=415V, I really need.

Please send to my Email- delour07@gmail.com

Cable sizing formula calculation:-

Data:-

I :-Load current =160 Amps.

L:- Length of cable in meters =200

P :- Resistivity of copper 0.024(90 deg.C).

Vd:- Voltage drop in 3 ph.=19volts.

3 ph.=1.732.

Apply formula for calculate the area of cable.

Area(mm2)= 1.733*I*L*p/Vd

= 1.732*160*200*0.024/19

= 70 mm2

Note:- 2 for single phase.

1.732 fot three phase.

Above said formula is perfectly correct.

Enjoy it.

Engr.Muhammad younas khan

M.Sc.Engg.,MIER(UK).

Wazirabad city

punjab,Pakistan.

How you calculate voltage drop in 3-PH is 19? and how it is calculated in case of single phase? My email address is saqibjaved786@hotmail.com

I have a one dought in apply the cable sizing formula .How u put Resistivity of copper 0.024 and this value 1.732 . If u have a any formula for that value please reply sir .

Thanks

Dear sir please give me lode calculations formula and voteg drop calculations and cable size calculations please give me reply sir thanku sir

SIZE OF CABLE FORMULA:-

I= LOAD CURRENT

L= LENGTH OF CONDUCTOR (IN METERS)

10 HP MOTOR 3PH.(10 X 746 =7460 WATTS) ,,, I = P/1.732 X 230 V= 7460/(1,732X230)

=18,72 AMPS

P=7460/PF=7460/0.85 = 8776.47 VA

NOW APPLY THE CABLE SIZING FORMULA:-

AREA mm2= 1.732 X L X VA/(K X Vd xVL)

= 1.732 X 200 X 8776.47/(58 X 6.9 X 230)

= 33 mm2

LENGEND:

I = LOAD CURRENT.

L = LENGTH OF CONDUCTOR.(IN METERS)

VA = VOLT AMPERE

K = CONDUCTIVITY OF COPPER 58 AND ALUMINUM 36

Vd = VOLTAGE DROP.

VL = LINE VOLTAGE.

USE ABOVE SAID FORMULA FOR CALCULATE THE SIZE OF CABLE BY EASY WAY.

How you calculate voltage drop?

Pls. share me for above answer if you found

Dear sir ,

I have a one doupt in apply the cable sizing formula .How u put conductivity and voltage drop value . If u have a any formula for that value please reply sir .

Thanks

Thank you very much. It will be tremendously useful for my further activity.

Once again, thanks a lot and all the best to all of you, guys !

Can you send me the calculation spreadsheet for Cable Size Calculations – Based On Motor Horse Power HP and Specified Current.with V L-L = 380V and VL-L=660V, I really need.

Please send to my email: mashadi.manurung@orica.com and mashadi.manurung@kni.co.id

Dear Edvard,

I found this one of the most useful site for new and experienced enginner.

Thank you verymuch for your efforts and interest.

Sharing of knowledge is always good.

My security software found the following application with an exploit virus: Cable Size Calculations – Based On Motor Horse Power HP and Specified Current. Please test it and post again.

It’s not virus for sure. Your security software is overreacting :) This spreadsheet as well as all the others contains VBA (visual basic for applications) part within itself that does the calculation.

I am an electrical power engineer. EEP is the only place I feel comfortable in. I am really impressed by all the hard work that the whole team go through. I promise to start writing here about Renewable Energies – soon. Thank you all!