Cable Size Calculator
This Cable Size Calculator is only applicable for Copper type Wire ( PVC / XLPE)
Please input all parameter to perform calculation.
Results Here
Recommended Cable Size
Wire Size Calculation Method
Step 1
Get the Input Load Current
Step 2
Allocate 20% more Current Capacity For Future Expansion (Load Current * 1.2)
Step 3
Multiply the ( Temperature Current Factor ) x Load Current( Calculated at Step2)( Different Cable will have different Current Factor)
Step 4
Determine where the Cable is install (Above / Underground) , Method of Installation ( Cable Tray , Conduit) then multiply it with the specific Constant shown in the Cable Spec
Step 5
Base on ( Type of installation , Cable Type , Method of Installation), Check the Cable Spec sheet to verify which cable Size" Diameter " AWG " is able to support your Calculated Current
Step 6
Determine the Allowable Voltage Drop eg: Your Single Phase incoming power is 220 vac and the Allowable voltage drop is 3 % ,then the calculated allowable voltage drop will be 6.6 vac
Step 7
At Step 6 you have found your Cable Size for example AWG 17. go back to the cable spec sheet and check the AWG 17 ( under the Voltage Drop / AMP - meter Column)
Step 8
Multiply the ( Voltage Drop / AMP - meter Column) x Current Value ( From Step 4) x (Distance from Load)
Step 9
If the Computation result from Step 8 is more than the allowable Voltage drop calculated at Step 6, Move down the table ,continue the computation Process until you find the Final computation value which is lesser than the Allowable Voltage Drop, and that will be your final cable size
Live Example
Step 1
Step 2
Step 3
Check the Temperature Constant Table
| oC | Constant |
Step 4
Step 5
Now You Got your Calculated Current .Base on these Condition inside the bracket( CableType ? Single Phase or Three Phase ? MultiCore or single Core ? Mounting Method ? )Search the Cable Specification Table , to check which Cable Size is able to support the calculated Current
| AWG | Cross Section Area mm2 | Maximum Ampere |
|---|
Step 6
Calculate the Allowable Voltage Drop
Step 7
Go back to the Cable and Calculate ( voltage drop per Meter X Load Distance x Calculated Current)
| AWG | Cross Section Area mm2 | Voltage Drop per Meter | Voltage Drop / m x Current x Load Distance |
|---|
Step 8 & 9
[pdf-embedder url=”https://www.creatifwerks.com/wp-content/uploads/2019/04/Cable-Size-Calculator.pdf” title=”Cable Size Calculator”]
Caution – For Reference only ( will not be responsible for any damage cause.)
All installation and Calculation must be check by a Certified Engineer , and Electrician
Note: Different Cables might have different Specification , you are advise to get the Cable Spec from the Manufacturer
Check out 4 to 20mA Calculator here