You can run six lights at 4.5 amps, 220 volts for a total of 27 amps, 220 volts or six lights at 9 amps 110 volts (three lights each side of the 220 volt circuit) for 27 amps at 110 volts and 27 amps on the other 110 volts. To calculate amperage, you simply divide the wattage by the voltage. You must note that for safety, the Canadian Electrical Code states that you can only load circuits up to 80% of their recommended capability.Īnother common question is “Should I run my lights on 110 volts or 220 volts?” The answer is that it makes no difference – a 1000 watt ballast uses nine amps at 110 volts or 4.5 amps at 220 volts go on a typical dryer outlet. Below is a table used to size wire for whatever load you have. The breaker is sized to protect the wire and then anything plugged into the circuit. The important thing to check first is the breaker size for the circuit you want to use. How to Calculate the Amp Draw of a 1000W Inverter Until a load is connected to an inverter, it does not use amps. The same 1000 watt load will use 40 to 60 amps on a 24V system. Therefore you could run up to eight lights and 10 lights respectively. Depending on the inverter efficiency, a 1000 watt load on a 1000 watt 12V inverter consumes 100 to 110 amps. A range outlet is typically 40 amps on an older house and 50 amps on a new house. A standard dryer outlet is 220 volts and 30 amps so you can power up to six 1000 watt lights on that circuit. A 1000w HPS or Metal Halide light takes 9 amps at 120 volts so you can only run one on a wall outlet circuit. Watts to Volts Formula Thus, the following formula to convert wattage to voltage is derived: V(V) P (W) I (A) The voltage V in volts is equal to the power P in watts divided by the current I in amps. There are up to 12 lights and or plugs on that circuit. For 1000 watts, assuming 8 Ohms, you need 11 Amps RMS or 15 Amps peak for sine wave signal. One of the commonly asked questions regarding electrical and gardening with High Intensity Discharge (HiD) lighting is “how many 1000 watt lights can run on this set?” Generally an outlet on your bedroom or basement wall is part of a 15 amp circuit. The 20 is the minimum reserve power for your inverter. Because inverters are not 100 efficient, some power is lost during the DC to AC conversion process, hence the need for reserve power. Electrical Safety for the Indoor Growrooms If your coffee machine uses 1000 watts, the inverter has to be 1200 watts minimum.
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