What is the purpose of the earthing, phase and neutral cables?
In your home’s plugs, you’ll see three cables: phase, neutral and earthing, each one with the aforementioned colours.
In normal conditions, the earthing does not have any electrical current and is only there to protect you. They are cables that go to your home’s electrical panel, and from there to the building’s earthing (an earth pin that, if necessary, carries the current underground). In the event of poor contact or a short circuit while you're handling an electrical apparatus, the earthing cable “traps” and expels from your house that electrical current, which otherwise would enter your body.
The phase cable is where the electrical current enters, and is the one you must be careful with, given that we are talking about a voltage of 220 or 230 volts. Only authorised professionals should handle them, and only after cutting the current.
Regarding the neutral cable, their function is to allow the current to “return”. In order to be transmitted, electricity needs two conductors, given that the current is only generated when the electrons move from one point to another. The voltage of your electrical installation is the difference of electric potential between the phase cable and neutral cable.
There is a way for all that we have said to be much simpler. It’s called not worrying at all and trusting the maintenance service that is in charge of your electrical installation:
- Unlimited repairs in your installation: in case of an urgent matter, the technician will be at your home within 3 hours of your call.
- The travel time and the first 3 hours of labour are free.
- Includes one repair of a white-range home appliance and two handyman services per year (changing plugs, installing lights, etc.).