Welcome to CuVoodoo,
the sorcery of copper.
work = is not suited as electricity meter fo my installation
three phase electric power distribution installation
did the same = also played with electricity
go to 14:49 if you want to skip them
at least when playing with cables
here = the cable you are testing
it's actually called one contact neon screwdriver test light
no electricity is passing when something is touching the shaft
a neon light
funnily the microphone picked the 50 Hz hum my body is emitting
passes through your body
an there is no 50 Hz hum
to warn that it is detecting electricity
at least 12V AC
it is really dim, particularly when the recording is over-exposed
but you can hear the hum again
I meant probe
almost no current
it measures the difference in currents
a malfunction in a electric appliance
no one touching the faulty appliance
it = the leaking current
called residual-current device (RCD), or residual-current circuit breaker (RCCB)
neutral in 1 phase systems, it can also to in other phases in multi-phase systems
safer then having as the current leaking
neon light tester
there is still some capacitance
or just capacitance
protect against touch live wire with your skin
breakers
a Raspberry Pi (not Arduino)
breakers
there I got it right
the rear light did not help as intended
and we will see why
theoretically/ideally 400V
switch
and the other phases
cutting the earth wire in the cable
you will see later how to identify the phases
single phase loads (not only one)
Vrms (not peak to peak)
the wave form is not immediate because I am averaging the waves on the oscilloscope to remove noise
the waveform do add, the measured Vrms values (toaster+kettle) for the currents do not
they don't have to be symmetrical, but the sum of the phase differences must by 360 degrees. symmetrical distribution has additional advantages
and in sync with the phases