Electronics > Repair
Test electrical outlets and circuit breaker
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TimFox:
The easiest English word to use here is "difference", where the current flowing in one conductor minus the current flowing in the other conductor should show a difference of zero (or damn close), paying attention to the polarity of the transformer or other sensor.
GGMM:
re,
I understand that the circuit breaker will act on a difference of current.
But in my case, I am protected on this old installation only by a circuit breaker of 500MA, since there is no circuit breaker 30MA.
So I have to change the installation.

here an example the effect of current intensity on the human body


cdt
tooki:

--- Quote from: GGMM on September 29, 2024, 06:45:55 pm ---re,
I understand that the circuit breaker will act on a difference of current.
But in my case, I am protected on this old installation only by a circuit breaker of 500MA, since there is no circuit breaker 30MA.
So I have to change the installation.

--- End quote ---
In English, the term "circuit breaker" means specifically and exclusively an overcurrent protection device. An RCD is not considered a circuit breaker (though devices exist that combine both functions).

French wiki says:

--- Quote ---Dans le langage courant, et notamment lorsque l'on parle de l'équipement d'un tableau de répartition électrique, les disjoncteurs différentiels sont simplement appelés « différentiels », alors que le terme « disjoncteur » est réservé aux disjoncteurs électro-magnétiques.
--- End quote ---
Thus:
disjoncteur = disjoncteur électro-magnétique = circuit breaker
differentiel = disjoncteur différentiel = dispositif différentiel à courant résiduel (DDR) = RCD (also known as GFCI in North America)


Also, mA is not the same as MA. mA = milliamp (1/1000th of an amp), MA = megaamp (1 million amps).
I'll assume you actually mean milliamps. ;)

So are you saying that right now, the circuit is protected by a 500mA RCD? That certainly, um, isn't for protecting human life! :P
TimFox:
It doesn't matter if you use "m" or "M", so long as you are sincere.
tooki:

--- Quote from: TimFox on September 29, 2024, 09:12:59 pm ---It doesn't matter if you use "m" or "M", so long as you are sincere.

--- End quote ---
In which case I'd be extremely concerned about a home breaker panel equipped with a 500,000,000 amp RCD! :P
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