Is the shield in the country house connected correctly?
Good afternoon. Please advise. I attach 2 photos to this letter. First: the main shield (No. 1). In it we are interested in the yellow IEK machine. In the second photo: shield number 2, here comes the electricity from the same IEK machine.
Here are my questions:
- Is the circuit safe? I am confused that IEK is 63 amperes. Isn't that a lot?
- Is it correct that zero is brought into this machine?
- Is everything connected correctly in Shield No. 2?
All this is used in a residential country house for standard household needs. Sometimes we turn on the heaters.
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Hello!
1) ABB introductory machine at 25 A, so it makes no sense to put the machine at a higher nominal value after the counter, since it will be useless. In the event of an overload, the 25 A circuit breaker will shut off, the 63 A circuit breaker will protect only against short circuits.
If the machine in front of the meter is 25 A, then the circuit is safe. The main thing is not to change the machine in front of the meter for a nominal above 40 A, since the meter itself is designed for a load current of not more than 60 A.
2) Errors in the fact that zero is brought into the machine no. For safety in case of electrical work in home wiring, it is preferable to have a gap, both phase conductors and zero. But a four-pole circuit breaker is usually placed at the input of the wiring, but in your case for some reason they put a four-pole on one line and a three-pole on the other - I see no point in this.
3) At the expense of connection - if the contacts are tightened well, then everything is correct. If one of the lines were not connected correctly, then some section of the wiring would not work for you.