What makes the current flow? In our water analogy we could say a battery would be the pump that makes the water flow which creates pressure in the pipe. The electric current is measured in amps. The rate at which electricity flows is measured as an electric current. POWERīack to our analogy electricity is the flow (like water) of electrons through a conductor like a wire. Watt – the basic unit of electric, mechanical, or thermal power, equal to one joule per second or 10 ergs per second (of a horsepower): for electric power it is equal to one volt-ampere. Volt – the basic unit of electromotive force (pressure), equal to the electromotive force, or difference in potential, that causes a current of one ampere to flow through a conductor. The accepted standard unit used for measuring how fast an electric current flows is an example of an ampere. So with this analogy in mind the definitions below for amp, volt and watt should be easier to understand:Īmp – an ampere is the unit for measuring electricity. Watts would be the power the water could provide (think back to the old days when water was used to power mills). If we think of electricity as water flowing through a pipe it can help us understand amps, volts and watts:Īmps would be the volume and speed of water flowing through the pipe. Power (P) in Watts Voltage (V) in Volts x Current (I) in Amps. What is the difference between an AMP, a VOLT, and a WATT? The basic Amps to Watts calculator uses the Watt’s Law which states that The total power of an electric circuit is equal to the product of electric current and voltage in that circuit. Modified on: Tue, 11 Dec, 2018 at 5:56 PM So 10 amps corresponds to a 2200 watt (2.2 KW) device.īecause a home's main service is 240 volts, the math looks like this: 240 volts x 100 amps = 24,000 watts.Solution home General Getting Started What is an AMP, VOLT and WATT? The current is mostly the power divided by the voltage = P/220 in amps. You cannot specify both current and voltage at the same time. With a better understanding of your RV's electrical system and some simple electrical formulas you can live comfortably on 30 amps with little to no problems. The key to living on 30 amps is to not exceed the amperage of an individual circuit, and to not exceed a total of 30 amps at any given time. A 50 amp plug has four prongs – two 120 volt hot wires, a neutral wire and a ground wire – that supply two separate 50 amp, 120 volt feeds.Ī 30-amp outlet supplies 3,600 watts (30 amps multiplied by 120 volts). Where P is the power in Watts, I is the current in Amps and V is the voltage in Volts.Įquivalent Volts and Amps Measurements for Various Power Ratingsġ2 Volt, you have a 12 Volt power supply that delivers 1 Amp of current.Ī 30 amp plug has three prongs – a 120 volt hot wire, a neutral wire and a ground wire – and is generally used on RVs with lower load requirements. For example, if you have a power of 10W running at 5V, the current is 10W / 5V = 2A.
The current I in amps (A) is equal to the voltage V in volts (V) divided by the resistance R in ohms (Ω): The current I in amps (A) is equal to the power P in watts (W) divided by the voltage V in volts (V): The voltage V in volts (V) is equal to the square root of the power P in watts (W) times the resistance R in ohms (Ω): To calculate amps, divide the voltage by the resistance in ohms. Ohm’s Law provides an alternate formula to find volts if amps and the electrical resistance is known. To calculate the relationship between charge in amp hours and voltage in volts, the formula should be used: rm Wh Ah × V Wh Ah × V. You can calculate Current from Voltage either providing the Power, or Resistance values.
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