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# Select Suitable Size of Electric Cable & Circuit Breaker

How to Select Suitable Size of Electric Cable & Circuit Breaker I have share Complete Electrical Cables Data in this Post You can understand easily after see this Electrical Cables data.

Temperature is also affect on electric line, so we can not neglects the temperature, a electric string have can get different current cargo capacity on different temperature. Then the temperature factor table which help to chose the correct size of electric line.

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## How to Calculate of House Electrical Load

We need plus complete load of House

Example :

First Number of Electrical Item Multiply with his Watt

• Lights 4 x 25 = 100 watt
• Ceiling fan 1 x 80 = 80 watt
• Iron = 1x 1000 = 1000 watt
• Laptop and Mobile charger etc. = 200 watt

100+80+1000+200 = 1380 watt total load

The Complete Load is 1380+276 = 1656 Watt

our Supply is 220 volts so 1656/200 = 7.52 amps

(Here is the ceiling fan not a resistive load , it’s a inductive load, for inductive load we also do calculation of power factor, but ceiling fan watt is not to high that we do inductive load calculation , however if we have high number of fan in building then we must fallow the inductive load formula.)

## suitable circuit breaker for house wiring (MCB & RCD)

If total House load is 7.5 ampere, there for we chose 10 ampere circuit breaker

If we have water pump motor of 1 HP in our house then
1 HP = 746 Watt

746 / (220 x 0.95) = 3.56
So it’s will take is starting time double current 3.56 x 2 = 7.12
So the suitable size of electric cable is 2.5 mm according table 1.

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Whirlpool Refrigerator ARB-884SGYS Electric Diagram

HVAC Solution