Test for electricians. Find violations.

Today I want to move away from the usual "tips", "life hacks" and "homemade".

I recently had a coven ... It was necessary to help one company, eliminate the instructions of the inspector from the "energy supervision".

It seems to me, dear colleagues, that it will be interesting for you to play the role of an inspector yourself and find violations of the PB. And at the same time check whether your opinion agrees with the opinion of the inspector.

What violations the inspector found, I will describe in the comments. Until then, let's go!

Main switchboard. There are 2 violations in this photo.

2. Again, the main switchboard. There is one violation here.

3. Switchboard workshop. To make it clearer to you, I marked the connection points of the input cable in the photo. 3 violations were found.

4. Ground bus in one of the workshops. One violation.

5. The same ground bus. One violation.

6. Switchboard of one of the workshops. Three violations.

What the inspector “dug up”, read below in the comments.

One thought on “ Test for electricians. Find violations. ”

What the inspector found:

There is no introductory circuit breaker. External lighting is connected bypassing protection devices (white wire is connected to the bus before the disconnector on phase "A")
The left circuit breaker with a rated current of 100A is connected to the busbar with conductors not designed for this load (aluminum 6mm2).
There is no general circuit breaker. The discrepancy between the rated current of the third automaton on the left (32A) and the rated current of the outgoing cable. It is visually noticeable that the insulation of the third wire from the left is heated, which led to its darkening.
Grounding leashes of different consumers are connected to the bus at one point.
Grounding leashes are interconnected by means of twisting.
There is no general circuit breaker. The neutral wires of different consumers are connected to the neutral bus using a common bolt. There is no protective cover on the front panel to prevent accidental contact with live parts.

Answer

admin:
02/05/2020 at 10:06
What the inspector found:
1. There is no introductory circuit breaker. External lighting is connected bypassing protection devices (white wire is connected to the bus before the disconnector on phase "A")
2. The left circuit breaker with a rated current of 100A is connected to the busbar with conductors not designed for this load (aluminum 6mm2).
3. There is no general circuit breaker. The discrepancy between the rated current of the third automaton on the left (32A) and the rated current of the outgoing cable. It is visually noticeable that the insulation of the third wire from the left is heated, which led to its darkening.
4. Grounding leashes of different consumers are connected to the bus at one point.
5. Grounding leashes are interconnected by means of twisting.
6. There is no general circuit breaker. The neutral wires of different consumers are connected to the neutral bus using a common bolt. There is no protective cover on the front panel to prevent accidental contact with live parts.
Answer