The easiest method today is by using a clamp meter. It "clamps" around a single conductor and measures the magnetic field (you can't get a reading by clamping around a regular appliance cord, as both conductors will cancel each other out).
The unit of measure for current load is amperage, or simply amps.
Amperage.
Amperage or Amps is a measure of is the flow rate of electrical current that is available.
To measure amperage output to see if an alternator is charging or not .
An ammeter measures amperage not voltage.
Electrical current stated or displayed as Amperage
To determine this you will have to measure the amperage the starter draws when you crank the engine. This amperage times the voltage (12 volts) will give you the wattage. There are 746 watts to 1 HP.
To check the amperage of an electrical circuit, you can use a clamp meter. Simply clamp the meter around one of the wires in the circuit to measure the current flowing through it. Make sure to set the meter to the appropriate amperage range before taking the reading.
The current is the amperage. It is measured in series. Voltage is measured across the line (parallel).
An ammeter measures the amount of current flowing through an electrical circuit. It measures amperage.
Measures the amperage of the current .Your battery is in series with your car amp meter .
You can measure the electrical current with an amp meter. Amperage measures the current flow.