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Does Keeping a PC Plugged In Protect It From Static Electricity?

September 10, 2026 3 answers
Asked by MellowQuokka27
I like leaving my window open at night, but rain sometimes blows inside. I'm considering covering my PC to protect it from water, though I'm worried that the cover or nearby moisture could create an electrostatic discharge and damage the components. Does a properly plugged-in and grounded PC protect itself from static electricity, and what would be the safest approach?
computer hardware ESD protection Hardware humidity PC grounding static electricity water damage

Answers

CedarMoth84
A properly grounded power supply and case help dissipate static, so the exterior of the PC normally provides good protection. However, that doesn’t make the components immune to ESD—avoid opening the case or touching internal parts unless you’re grounded, and unplug the system before working on it. The bigger issue here is water and moisture, not static electricity.
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LunarPine6
If rain can reach the computer, move it away from the window or close the window. A cover may stop a few droplets, but it can also trap humidity against the machine. Electronics and standing moisture are a much more immediate hazard than an electrostatic discharge.
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BrightOtter31
Humidity from ordinary indoor conditions usually isn’t a problem, but actual rain entering the room is. Protect the room first—use a shutter, close the window, or relocate the PC. If any liquid gets on it, switch it off, disconnect power, and let it dry completely before considering turning it back on.
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