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Originally published: 29/11/2017 17:00
Publication number: ELQ-64030-1
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Cable Size Calculation Spreadsheet

Cable size calculations based on Motor Horse Power HP and Specified Current.

by Jim Nash
Lecturer at the Gordon InstituteFollow 22

39 reviews8,202 views|1 comment|Bookmark download for free

excelelectrical engineeringcalculationsspreadhseetcable size

Description
The Sheet works with a series of Input Data giving you a number of calculated Values.

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 (%).

Please Note:

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

*Originally shared on electrical-engineering-portal*

This Best Practice includes
1 Downloadable Cable Size Calculations Spreadsheet

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  Ravikanth

  Very useful
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  Paddy Keys 2 years ago
  User

  Hi Jim the software looks of however, we in Africa use metric ...kW metres
  etc so if you can either redo in metric or supply password to edit
  Kind Regards Paddy Keys.

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