Chapter 832

In the freezer.

Gu Chen came to the machine, but did not immediately go to find out the situation, but turned to ask the old worker: "do you have a ground wire for your machine?"

"Yes, it's common sense of electricity use." The old worker also spits fragrance, saying: "when installing this large machine, in order to prevent leakage, the installation master has connected the ground wire and led the leakage current into the ground."

"So, since there is a ground wire, how can it get electric?" Gu Chen also secretly speculated, looking at the machine around.

Officer Wang followed him and asked the old worker, "how long has your machine been used? Has there been an electric shock before? "

"The machine has been used for half a year, and it has been very good. Except for one part damage, there is no major problem."

"That's strange." Gu Chen thought to his cheek and walked to the old worker and asked, "but how did you judge that the boss's sister died of electric shock? How did you get her out of the freezer? "

"I guess that too." The old worker did not conceal the meaning, explained directly: "at that time I entered the freezer, and found my boss and sister lying there, I didn't know what happened."

"But it may be possible to get electric shock when I lie beside the machine. After all, I have a hometown in another factory and have been electrocuted. But he is lucky to pick up a life, so I think the boss and sister may be electrocuted."

"And then?" Gu Chen asked again.

"And then? Then I found a wooden chair, carefully pulled her out of the machine, and then told the boss. "

Looking at the machine in front of his eyes, the old worker continued to add: "later I found a digital display pen, and there was a sign of lightning on the pen, so the machine was electrified."

"It turns out to be?" After knowing the general situation, Gu Chen nodded silently.

The woman died of electric shock caused by machine leakage?

But the electric shock accident the day before yesterday was accidental?

But both of them are acquaintances, so don't say the boss of the company feels strange. If it is Gu Chen's own judgment, they will have the same idea.

Looking at Gu Chen, the old worker looked at Gu Chen and asked him in a previous step: "Comrade police, the static electricity of this machine is too big. Even if we connect the ground wire, we still have static electricity, no matter what to do, no matter what to do?"

"It's not static, it's leakage." Gu Chen stepped back two steps and kept it in a reasonable range with the machine, which means:

once the static electricity touches the ground wire, it will be released immediately. Only the leakage is continuous. You should check the machine and moisture removal

"But..." Hearing Gu Chen's words, the boss suddenly came in from the outside: "but leakage, it should be on the start, but we just tried to turn off the machine and then turn on, it took a few minutes to have it."

"It's only a few minutes before it's leaked?" Gu Chen hesitated, and said: "static electricity is also a start-up ah."

"I can't understand that." The boss seemed very depressed. Looking at the body of his sister, he was sad and said: "it is unclear what the specific situation is, and it will leak in a few minutes. The digital display pen we use is not displayed when it is started. Try again later, and there will be a lightning sign on the pen."

"So terrible?" Luweiwei, who was also shivering, turned her head and said to Gu Chen, "if so, what should we do?"

Gu Chen did not immediately answer, but continued to ask the old worker: "what machine are you? Is the complexity factor high? "

"It shouldn't be high?" The old worker scratched his head and said: "even the ordinary refrigeration equipment, which was just used for half a year, was also an old brand. I asked many colleagues that they had not had leakage problems."

"Not high complexity factor?" If Gu Chen has thought, he said: "then I suggest you find a master who knows how to do it and check it in sections."

"First, disconnect the main circuit of motor, make sure to mark the sequence of the lines to avoid the motor reverse during recovery."

"Is there any power switch on the machine to see if the machine housing is live?"

"If so, the motor is OK, the problem is in the power switch section."

"In addition, it is recommended to press the button one by one, and so on."

"Er!"

Listening to Gu Chen face serious advice, the old worker Yi way: "Comrade police has been an electrician before?"

"No, just a little bit." Gu Chen said.

At this moment, there was a shout outside the freezer.

The boss heard that, hurriedly to the door, after a brief exchange, this came up with a man in blue overalls: "Comrade police, this is the sensible master I borrowed from the factory next door, and he should be familiar with it."

"Let him come and see." Gu Chen said.

The boss "Alas" a, hurriedly let the worker pass.

Middle aged workers seem to be very cautious, and walk to the machine, and ask about some of the machines repeatedly before they start opening the toolbox and preparing for testing the equipment.While the machine was constantly turning on and off for testing, Gu Chen asked officer Wang to stay at the scene, and he took Lu Weiwei to continue to go to the corpse outside the cold storage to detect the body again.

A few minutes later, Gu Chen eyebrow slightly a Cu: "the skin color of the dead is light yellow, but do not see inflammatory reaction?"

Due to the poor light outside the cold storage, Gu Chen took out a miniature flashlight and gently opened the eyelids of the deceased for examination.

At this time, there are also some conversations in the cold storage. Gu Chen simply takes back the flashlight and goes to the cold storage again with Lu Weiwei to understand the situation.

The skilled master received the tool and explained to the crowd: "the ground wire is still there after seeing it, but it is much smaller. At least there is no pain in the electricity."

"If you feel pain, the possibility of electricity leakage should be very large," Lu Weiwei said with a frown

"Well." The master nodded slightly, and then said, "if the site is wet, it won't be said. Use a hair dryer to heat those terminals. Don't miss any of them."

"Heat those terminals with a hair dryer? Not a single one? What's the process? Brother, please tell me more about it

It seems that the old workers don't understand it very well, but they can't understand it.

Gu Chen was the first to explain: "this master means Dehumidification and dehumidification can reduce the probability of leakage. If there is dirt, you can brush it off with a toothbrush. "

"Oh? Do police comrades understand this? " Gu Chen's answer, or let the teacher Fu Leng for a while.

Gu Chen smiles and doesn't speak.

The old worker on the side said: "but We are very dry, dirty, just a little gray. "

"Very dry?" Teacher Fu Leng Leng Leng God, and said: "that is really static electricity, is the problem still in the ground wire? But it seems that there are only three incoming lines just now. Do you want to make the ground wire again? "

The boss can't help but ask him curiously: "ground wire and zero line are the same thing?"

"No, No See the boss does not know the profession, the teacher quickly explained: "this is not the same thing, ha, ground wire is dedicated to protection, under normal circumstances, wood has current."

"But the zero line is the working wire, and there will be working current flowing through it."

"You need to see how many incoming wires you have in this room. There should be at least 4 cables, and 5 cables are better."

"Well, it seems that we have four incoming wires, and we received three at that time."

"Well." Hearing the old worker's speech, the master was silent for a few seconds, and then said, "I have a look at your machine, and I don't quite understand it. You'd better use neon electric pen to test whether it's bright or not."

"Yes, the digital display pen I used didn't show when I started up. I'll try again later. There will be a lightning sign on the pen." Said the old worker.

"Well." Fu seems to have some headache, scratching the back of the brain some tangled: "that ground wire how to connect?"

"Just Maybe it was connected to the heating pipe on the other end, and also connected with an iron bar on the ground Said the old worker.

The master nodded slightly, and then said: "on the outside land, hit a 1.5 meter long gold-plated iron pipe or angle iron, and drive it into the ground about 1.4 meters, and connect the metal parts of the machine."

"It seems so." The boss also had some impressions, and said, "that's how it was installed at that time. I remember that it was useless to nail a small nail on the ground. It had to be connected to the wet soil outside."

"How deep?" Gu Chen asked him.

"Only half a meter of wet soil." Said the boss.

Gu Chen shakes his head: "at least 1 meter deep."

The boss hesitated for a while, and then changed his words: "it seems that there is. I don't remember very much. Anyway, the installation worker is professional, and he should understand this."

"And this equipment has been used for more than half a year, and there is no problem in general."

"Are you connected to the land outside?" Asked the master.

The boss nodded slightly.

Fu Dun, the teacher, also fell into deep thought. He felt that there was no problem. It was estimated that there was something wrong with the operation of the machine and equipment.

But for a moment and a half unable to understand, he could only give up and say, "I'm really sorry, maybe I'm not familiar with this kind of machine. You'd better let the factory's family come over and have a look. If there's really a problem, the electrocution will have to compensate them."

Looking at Gu Chen still staring at the machine, the teacher asked casually: "police comrade, what do you think?"

"Two possibilities." Gu Chen held his chest in both hands, thinking.

Teacher Fu Yidai: "two Two possibilities? What do you mean? "

Gu Chen slightly pondered for a few seconds, and then he said: "either the machine shell and the terminal are disconnected. In order to make the ground wire work, the metal part of the machine shell must be well connected with the ground terminal of the equipment."

"But How to judge this? " The teacher was puzzled and could only consult Gu Chen.

Gu Chen said lightly: "in fact, the judgment method is very simple. You can use a multimeter to measure whether the metal shell of the equipment is connected with the terminal of the equipment.""This It seems that it can After hearing Gu Chen's words, the Master seemed to be inspired and nodded in silence. He felt that the little policeman knew a lot.

Then he asked, "is there another possibility?"

"There is also a possibility that the power outlet, that is, the ground wire of the patch board is empty, it may be a decoration."

Gu Chen didn't see the master taking apart the whole patch board, but he could only speculate: "if this is possible, then you can only use a multimeter, that is, the AC voltage is 750V, and some are 600V gear, to measure whether there is a voltage of 220 V left and right between the live wire and the ground wire."

"If there is voltage, the ground wire is connected. If there is no voltage, it means that the ground wire is a device. Check the wiring of the power socket again."

Glancing at the old master, Gu Chen suggested, "why don't you try these two ideas?"

"Er." Feel Gu Chen seems to be more experienced than himself, the teacher Fu immediately look ugly, a time is also embarrassed.

This makes the boss on one side also a little confused.

Heart said that a policeman, even in the education of a knowledgeable master of work, this picture seems to be in violation of.

However, the boss didn't know whether Gu Chen's remarks were useful, so he asked the master: "master, do you want to see if these two possibilities mentioned by this police Comrade are useful?"

"Well, this is really useful." The teacher was eager to speak but stopped, unable to organize the language for a while.

But I was called here by the boss to help, if this matter is not handled well, it will inevitably affect the reputation of his profession.

So the teacher insisted: "I'll try again according to your method."

The scene enters the detection state again.

Everyone stay away from the machine

The teacher and Fu wore special equipment, and again according to Gu Chen's suggestions, the equipment was carefully inspected again.

As time went by, the master was skillful in his movements and became able to use his hands in the process of dismantling.

After repeatedly checking the dismantling process, the old master's face suddenly began to look ugly. He turned to Gu Chen and said, "Comrade police, still You guessed it

"What's the situation?" Asked Gu Chen.

"The ground wire of the patch panel is empty, which is a decoration." Master Fu is also a face of consternation, feeling that the previous inspection is somewhat careless.

When the boss heard this, he suddenly turned blue and said, "no way. When I installed the equipment, I still stood beside me. How could the ground wire of the patch board be empty? How can this become a decoration? "

"If it's a decoration, why was it OK before? What's the matter now? "

The teacher Fu saw the boss spit fragrance, and he was going crazy.

So he quickly explained: "I just followed the advice given by the police comrade. The multimeter, that is, the AC voltage of 750V, measured whether the live wire and ground wire have a voltage of about 220 v

"If there is a voltage, it means that the ground wire is connected; if there is no voltage, it means that the ground wire is a device, but the result is the latter, which This is clearly a decoration. "

When hearing the old master's test results, all the people on the scene were shocked.

Such an important operation has become a decoration.

Gu Chen hears the speech and finally knows the cause of the victim's electric shock.

Can recall that the boss said that the installation of equipment is no problem, but if it is, then why this important operation will become a decoration?

"Is it man-made?" Gu Chen brow a frown, suddenly feel think carefully extremely afraid.

Combined with Gu Chen's simple examination of the body's condition just now, Gu Chen has reason to believe that this electric shock was not an accident.

After a week's scanning, Gu Chen stares at the boss and the old worker and asks again, "you said that this equipment has been used for more than half a year, and there has been no accident, right?"

"Yes, there has been no accident. We all watched the installation of the equipment." The old worker was puzzled. He saw it clearly, but why did it become a decoration?

Gu Chen asked again, "are these installers skilled?"

"Skilled, all old salesmen." The boss also said with the cavity: "I bought these equipment, other companies have also bought, generally these professionals in the installation and deployment."

"What's more, their installation procedures have strict standards. Every time they complete a project, they will check one item in the table. Therefore, after the table is checked, they have to carry out equipment commissioning test, which is completely professional standards."

"That's strange." Gu Chen took a deep breath and walked back and forth on the scene for two times, but he did not know why he said: "if according to what you said, there is no problem with the installation procedure of all the equipment, and you can see it with your own eyes during the installation, there is only one possibility."

After glancing at the crowd, Gu Chen said again: "this is not an accident, but a man-made one. He thinks that the ground wire of the plug-in board has been made into an empty one and made into a decoration, which leads to your sister's accidental electrocution and death.""Artificial?" When hearing this result, the boss's face suddenly startled, the whole person almost didn't fall to the ground.

Fortunately, the old worker on one side held him up in time: "boss, are you OK, boss?"

"Who did it? Who is it? " "My sister certainly didn't die in an accident. His friend was electrocuted two days ago," the boss yelled at the scene

Looking at Gu Chen, the boss suddenly stepped forward and clasped his hands on Gu Chen's shoulder: "police comrade, this must be murder, it must be, someone also hurt my sister, it must be like this."

"Please calm down." Gu Chen gently pushed the boss's hands away from his shoulders. Then he asked, "you said just now that your sister's friend was also electrocuted the day before yesterday. Is that true?"

Because I heard officer Wang say in the car before, actually Gu Chengang also wanted to ask, but it was delayed because of the detection machine.

But now it is found that there are traces of man-made damage to the equipment. The friend of the former victim was also electrocuted two days ago.

Therefore, it is necessary for longchen to understand the situation clearly.

The boss's face turned blue and said, "well, the day before yesterday, my sister mentioned that a friend of his who was also a factory owner died of electric shock in the workshop the day before yesterday."

"At that time, I felt very sorry. My sister was also very sad. I comforted her and made her want to be more open."

"Maybe it's because the family of my sister's friend thought it was an accident, so they didn't call the police."

Seeing officer Wang and Lu Weiwei beside Gu Chen, the boss said again, "but now I feel more and more that this matter is certainly not so simple."

"My sister's friend was electrocuted the day before yesterday, and my sister was electrocuted again today. Don't you think it's very strange? It must be someone who is making trouble. It must be. "

"Even if someone is making trouble, we should pay attention to evidence." Gu Chen turned his head and looked at the corpse outside the cold room and said, "I need to take the body back for inspection now. I want the body to speak by itself."

……

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