Almost every smart electrician is familiar with such a smart book as the Electrical Installation Rules (EIC), and knows that according to paragraph 3.1.6 power is supplied to the circuit breaker from the fixed contact side, that is, from the top. What happens if you do the opposite? Swap the supply wire?
You are interested? Then read on.
We simulate the situation: connecting machines from below
So what will happen if you connect an automatic machine from the bottom, where the moving contact is located? We'll have to visualize this situation.
First, the voltage on the lower contact will "hang" in the same way as on the upper one. Without going through the entire circuit breaker if it is off.
Secondly, when you turn on the bag, the arc between the contacting contacts will not increase, and it will not appear at all. But some "literate" users on the web say the exact opposite.
It turns out that the situation will not change much and the machine will also work properly, of course, if it is suitable for operation and does not have any faults.
How the bottom connection will affect the life of the bag
No way. There are many examples from the working life of professional electricians, in which almost all circuit breakers were connected from below. And at the same time they were used simply as ordinary switches, and not to protect the network from short circuits or prolonged heating of the conductors.
It is not for nothing that the design of any circuit breaker implies both bottom and top connection. Most likely, this was done for the safety of users, because not everyone is familiar with the statements of the PUE and can connect the wires to the machine as it suits them.
For what purpose is the connection from above defined?
Clause 3.1.6 does not strictly regulate the connection of circuit breakers, but only indicates how to do it right. It is not for nothing that the phrase "as a rule" is indicated in this paragraph of the PUE.
On the other hand, such a statement is useful in itself, namely:
- Each user who has read the PUE will know from which side it is necessary to correctly connect the machines. Accordingly, there will be fewer errors in power grids.
- With the help of technical literature, namely PUE, it is possible to come to a single consensus. This means that the top connection of the packets will be the standard - what is known to be correct. It is for this that certain standards are created all over the world so that people do certain things or processes in the same way.
therefore point 3.1.6 is not the goal of a technically safe, but a uniform connection. After all, then there is no confusion in electrical control rooms, which is often encountered by real master electricians.
Conclusion: you can connect the machine from below
At least this connection option will not harm either users or switching equipment. But it is best to do it correctly - as indicated in the technical literature, so that later you can quickly figure it out.