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# Wiring a house - Table for cable size CB

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• Essay length: 480 words
• Submitted: 21/02/2012
University Degree Architecture

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Table for cable size CB.S6004&6346

* Circuit = 240 volt supply

* Watts = volts × amps

* Amps = watts/volts

* Voltage loss = voltage drop × length of cable × amps

* Check does it comply with the 2.5% rule:

Lighting Circuit

Power circuit

Circuit 1

Cooker oven = 4350 watts

Amps = watts/volts

Using a 240 volt supply: Amps =4350/240

Amps = 18.125

Voltage loss = voltage drop × length of cable × amps

Voltage loss = 0.011 × 30 × 18.125 = 5.98volts

Check does it comply with the 2.5% rule:

5.98/240 × 100/1= 2.49% (under 2.5%)

Table for cable size CB.S6004&6346(circuit 1)

Circuit 2

Microwave = 1100 watts

Kettle = 2250 watts

Toaster = 1150 watts

Amps = watts/volts

Using a 240 volt supply: Amps =4600/240

Amps = 19.17

Voltage loss = voltage drop × length of cable × amps

Voltage loss = 0.0073 × 32.1 × 19.17 = 4.49volts

Check does it comply with the 2.5% rule:

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