The craftsman is enjoying a happy and happy single life without anyone disturbing, nesting in the quilt to brush the mobile phone to see the young lady who is not afraid of the cold, and suddenly received a request for help: the cash register suddenly tripped after it was installed, and directly jumped the total electrical box leakage, ** inside a brief inquiry, the store is about to open, and the sudden power outage is at a loss.
The craftsman set off immediately, and arrived at the scene in a short time.
There is a risk of electric shock, and non-professional electricians should not attempt to !!
Check the electrical box, all sockets have leakage protection, line fault theoretically the leakage protection of the distribution box trips first, is it that the leakage protection sensitivity of the distribution box is greater than the total electrical box?
Looking at the comparison, it turns out that it is not.
Continuing to investigate, it was found that the wires of the reserved sockets on the site were entangled, and the insulating tape was unwound, and the head was instantly on.
It turns out that the red line and the blue wire are together, and there is no separate insulation treatment, seeing this my head is buzzing, immediately install all the socket panels first, this should be no problem, and then start the test:
1. First pull down all the empty power distribution boxes.
2. Open and close the main electrical box empty, without tripping.
3. Close the empty distribution box one by one, and then there is a way to close it and trip, but this time it is the leakage of the distribution box, indicating that there is a new fault.
This is the time to continue the investigation.
Use the universal meter to check the tripping route, and find that the blue line is connected to the line pipe, and the blue line has been broken !! this route
Re-pay-off, the thread can't be worn back!!
Re-release the tube and pay-off, close the switch, and solve the problem.
So the question is, what caused the blue thread to break the skin?
According to the position of the blue line breaking the skin, the line pipe was accurately positioned, and I was surprised, it turned out to be like this!!
The craftsman didn't say much, telling the customer that professionalism is a matter or to find a professional person, and he usually pays more attention to the electrical box, focusing on odor, temperature, noise, and preparing more fire extinguishers and gas masks.
The craftsman hurried out of this place of right and wrong.