I sit on the object, crawling in the switching shield. The task is to find and sign the phase on a hundred and forty lines. Work for the whole day, boring, diligent and a little dangerous, because 220 volts is still a little bit, but unpleasant. A local electrician, an elderly man, arrives and is rubbed in places to holes. He looked at me for a few minutes and said:
Are you using these devices here? Go, boy, and prepare all the labels right away.
Then one hand is taken to zero, and the index finger of the other hand begins to tick in the contacts in turn. He periodically shakes a little and says:
B to J! The phase! Go to.
I give him a label, he sticks and goes on. In a few seconds again:
B to J! The phase! Go to.
Well done in half an hour.