A 13 Amp fuse (brown) is needed for a 3kw heater. <<>> Answer for USA, Canada and countries running a 60 Hz power supply service. 3000 watts at 120 volts = 25 amps, 3000 watts at 240 volts = 12.5 amps.
A 3000 Watts heater typically uses a 13 Amp fuse in its socket. 13 Amps is an accepted fuse rating because it can allow high power usage but will be secure enough to cut out any over-voltage that can damage an item.
A standard 3kW immersion heater will require a fuse rating of 13 A. This is because, it draws a current of 12 A.
Assuming being fed by c32 breaker for start load minimum cable size SWA is 70mm which will go to 456 meters
3000w / 220volts = 13.63amps 3000w/ 110volts = 27.27amps
Specific Heat of Water = 4.1813 kJ/l/K If starting temperature is say 10°C - 500 Litres * 4.1813 (100°C - 10°C) = 188158.5 kJ 188158.5kJ / 3kW = 62719.5 Seconds = 17.42 Hours
(1.08W/cm2)(10-3kW/W)(104cm2/m2)=10.8W/m2.
A standard 3kW immersion heater will require a fuse rating of 13 A. This is because, it draws a current of 12 A.
You need to know the amperage requirement of the pump and then you can calculate the wire size.
How to calculate a cable size of 3kw motor
Yes it can, you can either us a bestway or intex 3kw heater.
You should contact a certified, and licensed electrician.
3kw heater heating a 10 foot pool may take 4 to 8 hours for heating it up to 20 to 25 Degrees Celsius. This also depends on the outside temperature.
junction box
i have a 5ft pool and have a intex 3kw heater how long will it take to heat pool to a good swimm tempature
To answer this question a voltage must be stated.
The fuse protects the cable it is feeding therefore in UK upto 10A for 1.0mm cable, upto 15A for 1.5mm cable and upto 20A for 2.5mm cable. This is for installation type (solid core copper) cable not flex. In the UK and the rest of the EU (230V) 1 Kw load = 4A so 5A fuse should be OK. 2KW = 8A, 3KW = 12A so use 13A Fuse.
Assuming being fed by c32 breaker for start load minimum cable size SWA is 70mm which will go to 456 meters
Power = E2 / RResistance = E2 / power = (240)2 / 3,000 = 19.2 ohmsCurrent = E / R = 240 / 19.2 = 12.5 amperes