In Fig. C, 2 identical consumers are installed in parallel. The ammeter is positioned in 4 places of the electrical circuit.
When the switch is activated, we see that the input current (2.4 A) divides into 2 (1.2 A) because the consumers are identical. The output intensity is equal to that of the input.
If the consumers are different, the intensity divides unevenly (for example: 1 A & 1.4 A). But the output intensity remains equal to that of the input.
Kirchhoff's current law: The sum of the currents (intensity) which enter an electrical node is equal to the sum of the currents which emerge from it.
3- Precaution.
Be careful when using the multimeter as an ammeter, it is imperative to insert it in series on the electrical circuit. Any measurement taken in parallel can cause a short circuit. The ammeter behaves like a shunt, it is protected by a 400 mA or 10 A fuse depending on the rating and the multimeters used.
Immediately after using the multimeter as an ammeter, it is strongly recommended to reconfigure it as a voltmeter and to put the test pin back in the correct position in order to avoid forgetting and to risk a short circuit during the next measurement. .
Note : For measured currents greater than 10 A (eg: starting circuit), it is necessary to use an ammeter clamp. This clamp has the advantage of requiring no opening of the electrical circuit. (Photo below)