Inside the refrigerator.

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

"Yes, it's common sense to use electricity. The old worker also spat out fragrant mouth, and said: "When installing this kind of large machine, in order to prevent leakage, the installation master has already connected the ground wire and introduced the leaking current into the ground." ”

"Then since there is a grounding wire, how can it be electrocuted?" Gu Chen also secretly figured it out, looking left and right at the machine.

Officer Wang followed closely behind and continued to ask the old worker: "How long has your machine been used? Have you ever been electrocuted 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 is basically no major problem. ”

"That's weird. Gu Chen pondered, walked up to the old worker and asked, "But how did you judge that the boss's sister was electrocuted, and how did you get her outside the cold storage?"

"I'm guessing about that, too. The old worker did not mean to hide it, and directly explained: "When I entered the cold storage, I found the boss's sister lying there, and I didn't know what the situation was." ”

"But by feeling, lying next to the machine, there may be a possibility of electrocution, after all, I have a fellow in another factory, who has also been electrocuted, but he is lucky to pick up a life, so I think the boss's sister may be electrocuted. ”

"And then?" Gu Chen asked again.

Then I got a wooden chair, carefully pulled her away from the machine, and then informed the boss. ”

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

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

Co-authored this woman died of electrocution caused by an electric leak from the machine?

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

But these two people are acquaintances, not to mention that the boss of this company feels very strange, if Gu Chen judges it himself, he will have the same idea.

The old worker looked at Gu Chen's thoughtful appearance, and also stepped forward and asked: "Comrade policeman, the static electricity of this machine is too great, even if we connect the ground wire, it still doesn't work, there is still static electricity, what can we do?"

"Then it's not static electricity, it's leakage. Gu Chen took two steps back, kept in a reasonable range with the machine, and said:

"The static electricity will be released as soon as it touches the ground wire, only the leakage is continuous, you should check the machine and remove moisture. ”

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

"It won't leak until a few minutes later?" Gu Chen hesitated for a moment, and then said, "The static electricity is also there as soon as it is turned on." ”

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

"It's not clear what the specific situation is, and it will be a few minutes before the power leaks, and the digital electric pen we use has no display when it is just turned on, and after a while, there will be a lightning symbol on the electric pen. ”

"So terrifying?" Lu Weiwei shuddered when she heard this, she turned her head to look at Gu Chen and said, "If that's the case, then what should I do?"

Gu Chen didn't answer immediately, but continued to ask the old worker: "What kind of machine are you, is the complexity coefficient high?"

"It shouldn't be high, right?" The old worker scratched the back of his head, and also said with a puzzled face: "It's ordinary refrigeration equipment, this machine has just been used for half a year, and it is an old brand, I have asked many peers, and they all said that there has been no leakage problem." ”

"The complexity coefficient is not high?" Gu Chen thought for a while, and said, "Then I still suggest that you find a knowledgeable master and check it in sections." ”

"First of all, we must disconnect the main circuit of the motor, and we must do a good job of marking the sequence of the line, so as not to reverse the motor when restoring. ”

"Is there also a way to turn on the power switch on the machine and see if the machine shell is electrified?"

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

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

"Ugh!"

Listening to Gu Chen's serious suggestion, the old worker said, "Comrade police officer used to be an electrician?"

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

At this moment, there was a shouting outside the cold storage.

When the boss heard this, he hurriedly walked to the door, and after a short exchange, he stepped forward with a man in a blue overall: "Comrade policeman, this is a knowledgeable master I borrowed from the factory next door, and he should be familiar with this." ”

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

The boss "sighed" and hurriedly let the workers pass.

The middle-aged worker seemed to be very cautious, walked to the machine, and after repeatedly asking about the specific situation of some machines, he began to open the toolbox and prepare to test the equipment.

While the machine was constantly turning on and off for testing, Gu Chen asked Officer Wang to stay at the scene, while he took Lu Weiwei and continued to come to the corpse outside the cold storage to re-examine the corpse.

After a few minutes, Gu Chen's brows frowned slightly: "The deceased's skin color is pale yellow, but there is no inflammation?"

Since the light outside the cold storage was not good, Gu Chen took out a miniature flashlight and gently opened the deceased's eyelids for examination.

At this time, there was also some conversation on the side of the cold storage, Gu Chen simply took back the flashlight, and came to the cold storage with Lu Weiwei again to understand the situation.

The knowledgeable master received the tool aside, and also explained to everyone: "The ground wire is still there after looking at it, but it is much smaller, at least the electricity is not painful." ”

Lu Weiwei frowned slightly: "If you have pain, the possibility of electricity leakage should be very high." ”

"Hmm. The knowledgeable master nodded slightly, and said: "If the site is wet, then there is nothing to say, use a hair dryer to heat those terminals, and don't leak a single one." ”

"Use a hair dryer to heat those terminals? Don't leak a single one? What is the process? Brother, please tell me more about it. ”

The old workers didn't seem to understand much, and they also heard it in a fog.

Gu Chen took the lead in explaining: "What does this master mean...... Dehumidifies and removes moisture to reduce the chance of electricity leakage, and if there is dirt, you can use a toothbrush to brush it off. ”

"Yo, comrade police also know this?" Gu Chen's answer still made the old master stunned for a moment.

Gu Chen smiled slightly and didn't speak.

The old worker on the side couldn't help but say: "But...... We're very dry, dirty, just a little gray. ”

"It's very dry?" the old master was stunned, and then said: "Then it may really be static electricity, is the problem still on the ground line? But it seems that there are only three incoming wires just now, do you want to redo the ground wire?"

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

"No, no. Seeing that the boss didn't know how to do it, the master hurriedly explained: "It's not the same thing, the ground wire is dedicated to protection, and under normal circumstances, the wood has an electric current." ”

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

"You have to look at how many incoming wires you have in this room, there should be at least 4, preferably 5, 5 will be easy. ”

"Well, we seem to have 4 wires in here, and we took 3 wires at the time. ”

"Hmm. Hearing the old worker's words, the old master was silent for a few seconds, and then said: "I took a look at your machine, and I don't understand it very well. ”

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

"That's right. The old master seemed to have a headache, scratching the back of his head and being a little entangled: "How did you connect the ground wire?"

"That's it...... It may be that the other end is connected to the heating pipe, and an iron rod is also hit on the ground. The old worker said.

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

"It seems so. The boss also had some impressions, and said: "That's how it was done when it was installed, I remember that it was useless to nail a small nail in the ground, and it had to be connected to the wet soil layer outside." ”

"How deep?" Gu Chen asked him.

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

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

The boss hesitated, and then changed his words: "It seems to be, I don't remember much, anyway, the installer is professional, he should know this." ”

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

"Are you on the land outside?" asked the old master.

The boss nodded slightly.

The master suddenly fell into deep thought, 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 still let the manufacturer come over to take a look, if there is a real problem, the electrocuted person will have to find them for compensation." ”

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

"Two possibilities. Gu Chen clasped his hands to his chest, thoughtful.

The old master was stunned: "Two ...... Two possibilities? What do you mean?"

Gu Chen pondered for a few seconds before he said: "Either the machine shell and the terminal are disconnected, in order for the ground wire to work, the metal part of the machine shell must be well connected with the ground terminal of the equipment." ”

"Yes...... How to judge this?" the old master was puzzled, so he could only ask Gu Chen for advice.

Gu Chen said lightly: "In fact, the judgment method is also very simple, you can use a multimeter to measure whether the metal shell of the equipment is on with the terminal of the equipment." ”

"This ...... I think so. Hearing Gu Chen's words, the old master seemed to be inspired, and nodded silently, feeling that this little policeman knew a lot.

So he asked, "What about the possibility?"

"There is also a possibility that the ground wire of the power socket, that is, the power strip, is empty, and it may be an ornament. ”

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, then you can only use a multimeter, that is, the AC voltage is 750V, and there is also a 600V gear, to measure whether the live wire and the ground wire have a voltage of about 220V. ”

"If there is a voltage, the ground wire is connected, if there is no voltage, the ground wire is a decoration, and the wiring of the power socket should be rechecked. ”

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

"Ugh. Feeling that Gu Chen seemed to be more experienced than himself, the old master's face suddenly looked ugly, and he was embarrassed for a while.

This made the boss on the side also a little confused.

The heart said that a policeman was actually educating a knowledgeable master to do things, and this picture looked a little out of harmony.

However, what Gu Chen said just now, the boss didn't know whether it was useful or not, so he asked the old master: "Master, look at the two possibilities that this police comrade said, are they useful?"

"Well, well, that's useful. The master wanted to speak and stopped, and he couldn't organize the language for a while.

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

So the old master stubbornly agreed: "Then I'll try it according to the method you said." ”

The site entered the detection state again.

Everyone stays away from the machine......

The master wore special equipment and carefully tested the equipment again according to the highlight suggestions given by Gu Chen.

As time passed, the master was skillful and became handy in the dismantling process.

After repeatedly inspecting the dismantling process, the old master's face suddenly became unsightly, he turned his head to look at Gu Chen and said, "Comrade policeman, it's still ...... You guessed it. ”

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

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

When the boss heard this, his face turned blue and said: "Impossible, when the equipment was installed, I was still standing next to it, how can the ground wire of the power strip be empty?

"If it was an ornament, why was it okay before, and what's going on now?"

When the old master saw the boss spitting fragrant mouth, he was about to go crazy.

So he quickly explained: "I also followed the suggestion given by this police comrade just now, and the multimeter, that is, the AC voltage is 750V, measured whether the fire wire and the ground wire have a voltage of about 220V. ”

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

When they heard the test results of the master, everyone at the scene was shocked.

Such an important operation turned out to be an ornament.

When Gu Chen heard this, he finally knew the reason for the deceased's electrocution.

I can recall that the boss said that there is no problem with the installation of equipment, but if this is the case, then why does this important operation become an ornament?

"Could it be artificial?" Gu Chen frowned, and suddenly felt extremely frightened to think about it.

Combined with Gu Chen's simple inspection of the condition of the corpse just now, Gu Chen now has reason to believe that this electrocution is by no means an accident.

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

"Yes, there have been no accidents, we have been watching the equipment be installed. The old worker also wondered, he obviously saw it, but why did it become an ornament?

Gu Chen asked again: "Are these installers skilled?"

"Skilled, they're all old salesmen. The boss also said: "The equipment I bought has also been bought by other companies, and it is generally these professionals who are installing and deploying." ”

"And they have strict standards for installing procedures, and every time they complete a item, they will check one item in the form, so after the form is checked, they also have to conduct equipment debugging tests, which are completely professional standards. ”

"That's weird. Gu Chen took a deep breath, and after walking back and forth on the scene twice, he also said unexplained:

"If, as you say, all the devices have no problems with the installation process, and you see it with your own eyes when you install it, then there's only one possibility. ”

Glancing at everyone, Gu Chen said again: "This is not an accident, but man-made, it is thought that the ground wire of the power strip was made empty and made into an ornament, which caused your sister to be accidentally electrocuted." ”

"Human?" When he heard this result, the boss's face was shocked, and the whole person almost didn't fall to the ground.

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

"Who did it?" The boss suddenly went crazy and roared at the scene: "My sister definitely didn't die in an accident, his friend was also electrocuted two days ago." ”

Glancing at Gu Chen, the boss suddenly stepped forward and clasped his hands on Gu Chen's shoulders: "Comrade policeman, this must be murder, it must be, someone still harmed my sister, it must be like this." ”

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

Because I heard Officer Wang say in the car before, in fact, Gu Chen also wanted to ask just now, but it was delayed because of the detection machine.

But now it is found that there are traces of vandalism in the equipment, and the friend who contacted the deceased before was also electrocuted two days ago.

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

The boss turned blue and said: "That's the case, I heard my sister mention it the day before yesterday, a friend of his, who also runs a factory, was electrocuted in the workshop the day before yesterday." ”

"At that time, I felt very sorry, and I felt that my sister was also very sad, and I comforted her and made her want to open up. ”

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

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

"My sister's friend was electrocuted the day before yesterday, and my sister was electrocuted again today. ”

"Even if someone is playing tricks, you have to pay attention to the evidence. Gu Chen turned his head to look at the corpse outside the refrigerator, and said, "I need to bring the corpse back for testing now, and I want to let the corpse speak for itself." ”

......