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Why would they invented a plugs that's not grounded? (Type A and C)
I fucking hate it because my country's default plugs is type C. Caused me so much trouble in damaged electronics, shocked, and the effort to make a grounded line for each individual electronics myself.
Because the importance of grounding was something we figured out after those plugs were invented?
the non grounded plugs are usually only used on double isolated devices, like your phone charger.
double isolated basically means all the outputs are only referenced to each other and not to ground, so you won't get a shock by touching a usb plug, where you absolutely would if you touched live wire, where the reference is earth
my pc case shocked me when I touched it, not a huge shock like live wires but enough for you to feel a little pain (like static shock on winter day). My phone charger also shocked me the same way when i touched the metal part of the USB head.
yea PC power supplies do need the earth pin, but i'm surprised the usb also shocked you, maybe a faulty adapter?
It's a $80 GAN charger from Ugreen and the C-to-C cable that came with my iPhone.
I would be a big sad chump if it's a faulty brick. But thanks, I'll find a way to troubleshoot that.
If it shocked you, it's faulty
Remember, all this stuff started over a century ago. The main application was electric incandescent lights, which are fine to run with only two wires.
Type c is commonly used in my country for small appliances as it can be used with type E and F plugs which are used everywhere
Finland uses C and F, where F is for grounded and C is for laptop chargers and such that don't need grounding.
devices with double insulation don't need a ground connection
Does Finland use C outlets, though?
At least in the US, just about every outlet has a ground port (Type B), even if the device you're plugging in has only a 2-prong plug. I've only seen the Type A outlet in one really old building.
Lots of old houses in the US still have a bunch of the Type A outlet. My first apartment did for most outlets.
Now, what's really fun is Knob and Tube wiring, where the hot and neutral lines are separate wires. Which means they tended to be run in separate directions if it was convenient for the asshole from a century ago to run it that way.
Your neutral should be bonded to ground anyway. If you have current on the neutral that needs the ground path, something is wrong.
That really depends on the network. The only connection between PE and N might be at the power station (TN-S) or there might be no wire at all (TT).
All the house I wired had neutral bonded to ground wire at the panel.
Sounds like TN-C-S. There's a gazillion tradeoffs between those things, above my paygrade, and TBH above the paygrade of many many many electricians unless they happen to be network techs.
Hi, so should I just grounded the neutral wire from the fuse box (the one that goes from the pole into the house) instead of running a ground wire to each devices?
The best practice is a separate ground wire. But there's plenty of houses without them.
A is much less of a pain than C. At least in most cases the plug pinches into the outlet and stays in place.
I've used C while traveling for my charger and The weight of a few cords wants to drag that fucker out every time.
Also worth noting that A can come in the polarized (one plug slightly larger, fits one way) or non-polarised (doesn't matter) variety.