“Electric grids” — somewhat mysterious devices — usually appear on the walls of military restricted zones and detention centers. A resident reported that an “electric grid” had been installed on the wall of a community, and the prominent warning signs made passers-by nervous: “High-voltage wires along the street — what if someone gets hurt?”
That morning, a resident told reporters that a newly built community had installed a “high-voltage grid” on the street-facing wall, only 1.5 meters from the road, and many passers-by were worried about being electrocuted.
At 9 am, reporters visited the community. On the south wall near the road, electronic surveillance was installed; six bare wires ran in parallel along the iron fence, with yellow warning signs every few meters reading “Warning: Electronic Fence. Stop. High Voltage. Danger.” with a triangular high-voltage hazard symbol.
A passing resident told reporters she usually walks around the block: “These ‘electronic fences’ are installed along the roadside and involve public safety. What if a wire leaks electricity, or someone touches it with an umbrella by accident? Who is responsible?”
A resident decorating a building beside the wall said: “Since the ‘electronic fence’ was installed, I feel much safer and thieves no longer dare to come in. I sleep soundly now.”
However, some residents expressed concerns: “The property installed the ‘electronic fence’ for the residents' good, but what if a naughty child climbs the wall and touches it?” Others felt the community could use infrared anti-theft equipment instead, saying the electronic fence affects the community's appearance and makes people feel like they are living in a prison.
Does the “electronic fence” carry high voltage, and can touching it injure the body? A community security guard explained: “The electronic fence will not injure people; it only produces a numbing sensation. The effect so far is good.”
To clarify how effective such electronic fences are, a reporter contacted a staff member of a Shanghai company that morning. He said: “The effect is very good — if a person climbing the fence touches it, their hand will be numbed.” He noted his company had built such fences for two communities in Hefei: “I don't know the exact voltage — it needs professional electricians to set — but it is certainly within a range safe for the human body and will not endanger life.”
He explained that a display in the property's control room lights up showing which section of the fence has been intruded upon, allowing guards to respond in time: “These fences are custom-made; we can set the voltage for you.”
On legality, lawyer Chen of Anhui Zhongtianheng Law Firm said electric fences should also be approved by the state power authority; if they injure anyone, the property company cannot escape responsibility. He said high-voltage warning signs should be installed by the power authority, not by the developer or property company. “If such a fence frightens people and creates a psychological threat, legal liability can be pursued — it is also a tort.”
Chen believes installing electronic fences increases factors endangering others' personal safety; if a child or elderly person is injured, the property company must bear civil compensation. “Even a thief's right to personal safety is protected by law; you cannot deliberately or negligently injure or kill them for theft. If a thief is seriously injured by electrocution during theft, the community may be found to have used excessive force.”
What is an electronic fence? It is a perimeter anti-theft alarm system. The energizer generates and receives high-voltage pulse signals and produces alarm signals when the front-end fence is touched, short-circuited or cut, sending intrusion signals to the security alarm center. Its blocking effect is embodied in deterrence; forced breakthrough triggers an alarm.
What is an electric grid? An electric grid is an effective alert and defense facility, but because it is highly dangerous to people and animals and involves public safety, it is permitted in China only for political, military, key scientific and public-security purposes and critical enterprise sites, and installation requires approval — unlike electronic fences, which operate at pulse energies safe to humans.
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