How to select wires & cable Suiting to your requirement

Following steps should be taken to select wires and cables:

• Know the required current that the cable will be carrying during normal operation. To calculate the current ratting, divide the power (in watts) by supply voltage. If power is given in HP (Horse power) multiply it by 746 to obtain power in watts.
• Select the appropriate cable size. Which has current rating more than the required current rating.
• The current rating given in tables are at an ambient temp. of 40°C. Multiply this rating with suitable temperature correction factor. The table of temperature correction factor is following after this.
• After temperature correction. cables current rating should be more than required current rating current.
• It's always wise to choose one size higher, keeping in mind the future expansion and overload protections.