I am a super cop

Chapter 832 I want to let the corpse speak for itself

In the freezer.

Gu Chen came to the machine, but did not immediately go to check the situation, but turned around and asked the old worker beside him: "Does your machine have a grounding wire?"

"Yes, this is the common sense of electricity use." The old worker also said sweetly, "When installing such a large machine, in order to prevent leakage, the installer has already connected the ground wire and led the leaked current into the ground. to the ground."

"Then since there is a grounding wire, how can there be an electric shock?" Gu Chen also thought to himself, looking left and right at the machine.

Officer Wang followed closely behind and continued to ask the old workers: "How long have you been using this machine? Have you ever had an electric shock before?"

"The machine has been used for more than half a year, and it has always been very easy to use. Except for one part damage, there are basically no major problems."

"That's weird." Gu Chen thought with his chin in his hands, walked up to the old worker and asked, "But how did you judge that the boss's sister was electrocuted to death? How did you get her out of the refrigerator?"

"I guessed this too." The old worker didn't mean to hide anything, and explained directly: "When I entered the refrigerator, I found the boss's sister lying there. I didn't know what was going on at the time."

"But by feeling, lying next to the machine, there may be a possibility of electric shock. After all, I have a fellow in another factory who was also electrocuted, but he was lucky and saved his life, so I think the boss's sister may have been electrocuted." .”

"And then?" Gu Chen asked again.

"Then? Then I found a wooden chair, carefully pushed her away from the machine, and then notified the boss."

Glancing at the machine in front of him, the old worker continued to add: "Later, I found a digital display pen, and the symbol of lightning appeared on the test pen, so the machine is charged."

"So that's the case?" After understanding the general situation, Gu Chen silently nodded.

Is the co-author of this woman electrocuted to death due to electrical leakage from the machine?

But the electric shock accident that occurred the day before yesterday was accidental?
But these two people are both acquaintances, not to mention that the boss of this company feels strange, if it is Gu Chen's own judgment, he will have the same idea.

Seeing Gu Chen's pensive look, the old worker stepped forward and asked, "Comrade police, this machine has too much static electricity. Even if we connect the ground wire, it still doesn't work. There is still static electricity. What's the matter?" Do it?"

"That's not static electricity, but electric leakage." Gu Chen took two steps back, kept within a reasonable range with the machine, and said:

"Static electricity will be released immediately when it touches the ground wire. Only leakage is continuous. You should check the machine and remove moisture."

"But..." Hearing Gu Chen's words, the boss suddenly walked in from the outside and said, "But if there is a power leakage, it should be there as soon as the machine is turned on, but we just tried to turn off the machine and turn it on again, and it took a few minutes before it happened. .”

"It will leak after a few minutes?" Gu Chen hesitated, and then said: "Static electricity is also there when the machine is turned on."

"I don't understand this." The boss seemed very depressed, looking at his sister's body, he also said with a sad face:

"I don't know what the exact situation is. It took a few minutes for the electricity to leak. The digital display pen we used had no display when it was turned on. Try it again later, and there will be a lightning symbol on the pen."

"So scary?" Lu Weiwei also shuddered when she heard the words, she turned to look at Gu Chen and said, "If that's the case, what should I do?"

Gu Chen didn't answer right away, but continued to ask the old worker: "What kind of machine are you guys? Is the complexity factor high?"

"Shouldn't it be high?" The old worker scratched the back of his head and said with a puzzled look: "It's just ordinary refrigeration equipment. This machine has only been used for half a year, and it is considered an old brand. I asked many colleagues, and they all said There have been no leakage issues.”

"The complexity factor isn't high?" Gu Chen said thoughtfully, "Then I still suggest that you find a master who knows how to do it, and check it step by step."

"First of all, the main circuit of the motor must be disconnected, and the order of the lines must be marked to prevent the motor from reversing when it is restored."

"Also, turn on the power switch on the machine to see if the shell of the machine is charged?"

"If there is, there is no problem with the motor, and the problem is in the power switch part."

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

"Uh!"

Hearing Gu Chen's serious suggestion, the old worker said in amazement, "Comrade policeman was an electrician before?"

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

At this moment, there was a clamor outside the refrigerator.

Hearing this, the boss hurried to the door, and after a brief exchange, he brought a man in blue overalls forward: "Comrade policeman, this is the knowledgeable master I borrowed from the factory next door. He should be familiar with this."

"Then let him come and take a look." Gu Chen said.

The boss let out an "ah" and hurriedly let the master pass.

The middle-aged master seemed to be very cautious. He walked to the machine and asked about the specific conditions of some machines repeatedly before opening the toolbox and preparing to test the equipment.

While the machine was being turned on and off for testing, Gu Chen asked Police Officer Wang to stay at the scene, and he took Lu Weiwei to the corpse outside the freezer to conduct another test on the corpse.

A few minutes later, Gu Chen frowned slightly: "The complexion of the deceased was light yellow, but there was no inflammatory reaction?"

Since the light outside the freezer was not good, Gu Chen took out a miniature flashlight and gently opened the eyelids of the deceased to check.

At this moment, there was also some conversation in the cold storage. Gu Chen simply took back the flashlight, and went to the cold storage with Lu Weiwei again to find out the situation.

The knowledgeable master took the tools aside and explained to everyone: "The ground wire is still there, but it's much smaller. At least the electric wire doesn't hurt anymore."

Lu Weiwei frowned slightly and said, "If you feel pain, then the possibility of electric leakage should be very high."

"Yeah." The knowledgeable master nodded slightly, and said again: "If the site is wet, then there's nothing to worry about. Use a hair dryer to heat those terminals, and don't miss any of them."

"Heat those terminals with a hair dryer? Don't leak any of them? What is the process? Brother, please explain in detail."

The old workers didn't seem to understand much, and they were also confused.

Gu Chen took the lead in explaining: "This master means...to remove moisture and moisture, reduce the chance of electric leakage, and if there is any dirt, you can use a toothbrush to remove it."

"Yo? The police comrades also understand this?" Gu Chen's answer still made the master stunned for a moment.

Gu Chen smiled slightly, but said nothing.

The old worker on the side couldn't help but said: "But... our stuff is very dry, it's dirty, it's just a little gray."

"It's very dry?" The master was stunned for a while, and then said: "Then it may be static electricity. Could it be that the problem is still in the ground wire? But it seems that there are only three incoming wires just now. Do you need to redo the ground wire?" what?"

The boss couldn't help asking him curiously: "Is the ground wire and the neutral wire the same thing?"

"No no." Seeing that the boss didn't know how to do it, the master quickly explained: "This is not the same thing. The ground wire is dedicated for protection. Under normal circumstances, there is no current."

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

"You have to see how many incoming lines are in your room. There should be at least 4, preferably 5, and 5 will be easy."

"Uh, we seem to have 4 incoming lines, and we connected 3 at the time."

"En." Hearing the old worker's words, the master was silent for a few seconds, and then said: "I have looked at your machine, and I don't understand it very well. You'd better use a neon tube electric pen to test whether it is on or not."

"I've used it. I used a digital display pen. When I first turned it on, there was no display. Try again after a while, and there will be a lightning symbol on the pen." The old worker said.

"That's it." The old master seemed to have a headache, scratching the back of his head and wondering: "How do you connect the ground wire?"

"It's... maybe the other end was connected to the heating pipe, and it was also connected with an iron rod on the ground." The old worker said.

The old master nodded slightly, and said again: "On the ground outside, drive a 1.5-meter-long gold-plated iron pipe or angle iron, drive it into the ground about 1.4 meters, and connect the wires to the metal parts of the machine."

"It seems to be like this." The boss also had some impressions, and said: "It was done like this when it was installed. I remember that it is useless to drive a small nail on the ground. It must be connected to the wet soil layer outside."

"How deep?" Gu Chen asked him.

"The wet soil is only about half a meter." The boss said.

Gu Chen shook his head: "At least 1 meter deep."

The boss hesitated for a while, and then changed his words: "It seems to be there, I don't really remember, anyway, the installer is a professional, he should understand these."

"And this equipment has been used for more than half a year, and there are generally no problems."

"Did you take it to the land outside?" the old master asked.

The boss nodded slightly.

The master chef was also lost in thought immediately, feeling that there was no problem, and it was estimated that there was a problem with some operations of the machinery and equipment.

But for a while, he couldn’t understand, so he could only give up and say: “I’m really sorry, maybe I’m not familiar with this kind of machine, you should ask the manufacturer to come and have a look. If there is a problem, the electrocuted person will have to seek compensation from them.”

Seeing Gu Chen still staring at the machine thoughtfully, when the master passed by Gu Chen, he also casually asked: "Comrade policeman, what do you think?"

"Two possibilities." Gu Chen folded his hands on his chest, thoughtful.

The master was stunned for a moment: "Two...two possibilities? What do you mean?"

Gu Chen pondered for a few seconds, and then said: "Either the machine casing is disconnected from the terminal. If the ground wire is to work, the metal part of the machine casing must be well connected to the equipment ground terminal."

"But... how do you judge this?" The master hesitated for a while, and could only tentatively ask Yu Gu Chen for advice.

Gu Chen said lightly: "Actually, the way to judge is also very simple. You can use a multimeter to measure whether the metal casing of the device is connected to the terminal of the device."

"This... seems to be okay." Hearing Gu Chen's words, the master seemed to be inspired, and nodded silently, feeling that the little policeman knew a lot.

So he asked again: "Then there is another possibility?"

"There is another possibility that the power socket, that is, the ground wire of the power strip is empty, and it may be a decoration."

Gu Chen didn't see the master disassemble the entire power strip, so he could only speculate and say:

"If there is such a possibility, you can only use a multimeter, that is, the AC voltage is 750V, and some have a gear of 600V, and measure whether the live wire and the ground wire have a voltage of about 220V."

"If there is voltage, the ground wire is connected. If there is no voltage, the ground wire is just a decoration. Check the wiring of the power socket again."

Glancing at the old master, Gu Chen suggested, "Why don't you try it from these two perspectives?"

"Uh." Feeling that Gu Chen seemed to be more experienced than himself, the master's face immediately turned ugly, and he was also embarrassed for a while.

This made the boss on the side a little confused.

I said in my heart that a policeman is actually educating a knowledgeable teacher to do things. This picture seems a bit inconsistent.

But the boss didn't know whether what Gu Chen said just now was useful, so he asked the old master, "Master, take a look at the two possibilities that the police comrade said, are they useful?"

"Uh, well, it's really useful." The master hesitated to speak, unable to organize his words for a while.

But I was called here by the boss to help, if I can't handle this matter well, it will inevitably affect my reputation in the industry.

So the master bit the bullet and agreed: "Then I will try the method you said."

The scene enters the detection state again.

Everyone stay away from the machine...

The master master wears special equipment, and carefully inspects the equipment again according to the two suggestions given by Jia Jiachen.

Time passed by every minute and every second, the master's movements were proficient, and he also became more skillful in the dismantling process.

After repeatedly inspecting the dismantling process, the old master's face suddenly turned ugly. He turned his head to look at Gu Chen and said, "Comrade policeman, you...you really guessed it right."

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

"The ground wire of the power strip is empty. It's just a decoration." The old master also looked shocked, feeling that the previous inspection was a little careless.

When the boss heard it, his face turned blue and he said, "Impossible. When I installed the equipment, I stood beside it. Why is the ground wire of the plug board empty? How could this be a decoration?"

"If it's a decoration, why was it okay before? What's going on now?"

The old master went crazy when he saw that the boss was spitting out fragrance.

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

"If there is a voltage, it means the ground wire is connected. If there is no voltage, it means the ground wire is a decoration, but the result is the latter. This... this is clearly a decoration."

When they heard the test results from the old master, everyone on the scene was shocked.

Such an important operation turned out to be a decoration.

Upon hearing this, Gu Chen finally knew the reason why the deceased was electrocuted.

But I recall what the boss said, there is no problem with equipment installation, but if this is the case, then why does this important operation become a decoration?
"Could it be artificial?" Gu Chen frowned, suddenly feeling extremely frightened.

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

After scanning the eyes for a week, Gu Chen stared at the boss and the old worker, and asked again for confirmation: "You said that this equipment has been used for more than half a year, and there has been no accident, right?"

"That's right, there have been no accidents. We all watched the installation of the equipment." The old worker was also puzzled. He obviously saw it, but why did it become a decoration?
Gu Chen asked again: "Are these installation workers skilled?"

"Proficient, they are all old salesmen." The boss also followed suit: "The equipment I bought has also been bought by other companies, and these professionals are usually installed and deployed."

"And their installation procedures have strict standards. Every time an item is completed, an item will be checked in the form, so after the form is checked, they will also conduct equipment debugging tests, which are completely professional standards."

"That's weird." Gu Chen took a deep breath, and after walking around the scene twice, he still didn't understand why and said:

"If according to what you said, there is no problem with the installation procedures of all the devices, and you can see it with your own eyes when you install it, then there is only one possibility."

Glancing at everyone, Gu Chen said again: "This is not an accident, but man-made. It is man-made to make the ground wire of the power strip empty and make it into a decoration, which caused your sister to be electrocuted and died accidentally."

"Human?" When he heard the result, the boss was shocked, and he almost fell to the ground.

Fortunately, the old worker at the side grabbed him in time: "Boss, are you okay, boss?"

"Who did it? Who is it?" The boss suddenly became mad, and shouted at the scene: "My sister must not have died in an accident. His friend was also electrocuted to death two days ago."

Glancing at Gu Chen, the boss suddenly stepped forward, clasping his hands firmly on Gu Chen's shoulders: "Comrade policeman, this must be murder, it must be, someone is going to kill my sister, it must be like this."

"Please calm down." Gu Chen pushed the boss's hands away from his shoulders lightly, and then asked again: "You just said that your sister's friend was also electrocuted and died the day before yesterday. Is there such a thing?"

Because what Officer Wang said in the car before, Gu Chen actually wanted to ask just now, but was delayed because of the detection machine.

But now it is found that there are traces of man-made damage to the equipment, and the friend of the deceased was contacted, and he was electrocuted and died two days ago.

Therefore, Gu Chen felt that it was necessary to understand the ins and outs of this matter clearly.

The boss turned blue and said, "That's right. I heard from my sister the day before yesterday that a friend of his who also ran a factory was electrocuted and died in the workshop the day before yesterday."

"At that time, I felt very sorry, and felt that my sister was also very sad. I comforted her and made her think about it."

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

Glancing at Police Officer Wang and Lu Weiwei beside Gu Chen, the boss said again: "But now I feel more and more that this matter must not be so simple."

"My sister's friend was electrocuted to death the day before yesterday, and my sister was electrocuted to death again today. Don't you think it's strange? Someone must be playing tricks, it must be."

"Even if someone is playing tricks, we must pay attention to the evidence." Gu Chen turned his head to look at the corpse outside the refrigerator, and said, "Now I need to take the corpse back for testing, and I want the corpse to speak for itself."

……

(End of this chapter)