Gregory's Server
@LilahTovMoon That's why it's not gonna make it here in Germany. We're running on 230V.
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27 comments
@das_menschy @cgudrian @LilahTovMoon not sure what you mean, the video appears to show 120Vac on the exposed metal of the vehicle. @Wifiwits @cgudrian @LilahTovMoon Ok, so I was wrong. I thought it's static electricity. My fault.  @das_menschy  @momo @das_menschy @Wifiwits @cgudrian @LilahTovMoon "No idea if we got the license or not. The inspector ran screaming towards the horizon and disappeared there. 🤷♂️" ;-)  @Habrok42 @momo @das_menschy @Wifiwits @cgudrian @LilahTovMoon It's most likely the charger is miswired- they are using AC charging and line and neutral are reversed. Neutral should be at ground potential, so if there's LN reversed, the chassis of the device (appliance, Cyberturkey, wotever) will have line voltage present. However, there's no excuse for the vehicle not detecting this wiring fault and warning the user and disconnecting the AC charger- that part is on Tesla @weezmgk @Habrok42 @momo @das_menschy @Wifiwits @cgudrian @LilahTovMoon I agree it's most easily explained by a charger issue, but how should the car detect that, given that it's not grounded itself? I think the charger would have to have not only L and N reversed, but also PE connected to L, plus probably no RCD. @cm N & earth should be at at the same potential (or mV close to it). If it isn't, the car should disconnect and go into a fault mode and put an alarm notice somewhere (dash cluster? Display screen?) This is what they pay the EEs big bucks for. @Habrok42 @momo @das_menschy @Wifiwits @cgudrian @LilahTovMoon @weezmgk @Habrok42 @momo @das_menschy @Wifiwits @cgudrian @LilahTovMoon What the car sees on L, N and PE might not be the same as the outside world does, assuming sufficiently malicious wiring in the EVSE. And without a stake in the ground you can't really determine whether the wire labeled "PE" is at that potential. @cm There's an earth reference in the charge connector, which should be sufficient to determine if L&N are correct or reversed. Most device design simply trusts that the sparky who wired the residence didn't cock it up. But it is possible to detect such a fault and protect the user from it. At the price of an EV, I would rather expect that feature would be there, it's not a toaster. @Habrok42 @momo @das_menschy @Wifiwits @cgudrian @LilahTovMoon @weezmgk @Habrok42 @momo @das_menschy @Wifiwits @cgudrian @LilahTovMoon J1772 is used for both 120v and 208/240V, so the same two pins are use for L+N and L1+L2. There's no reason to care what the potential of L and N are relative to PE for the onboard charger, the charger just needs to draw current from the two line inputs at whatever potential they are relative to each other. This seems like the PE is connected to line.  @weezmgk What do you mean ? Even if Neutral and Live wires were inverted in the charger wiring, which sucks already, the chassis wouldn't be under 120 V… Neutral IS NOT supposed to be connected to chassis. That's Protective Earth Wire role to ground chassis. PE and N have to same potential, 0V, but aren't supposed to be connected to each other. If electried chassis is connected to Neutral, it wouldnt be properly grounded… @Habrok42 @momo @das_menschy @Wifiwits @cgudrian @LilahTovMoon  @das_menschy @Wifiwits @cgudrian @LilahTovMoon This isn't. @JeffGrigg most drivers of any type of car experience static shocks. Caused by rubbing clothing fabrics on car upholstery. If the driver wears rubber soled shoes, there will be a charge potential difference from ground until the driver touches a grounded object. This can be a problem when pumping petrol into a vehicle. @das_menschy @Wifiwits @cgudrian @LilahTovMoon  @das_menschy @Wifiwits @cgudrian @LilahTovMoon DC is way more like AC than static. 120v DC is almost as dangerous as 120v AC, while 120v of static is nothing compared to rubbing feet on a carpet. (typically into the thousands) @das_menschy @Wifiwits @cgudrian @LilahTovMoon holy shit, you're right! in the last bit of the video, it's visible that the multimeter is set to AC. so basically they connected the charger's phase wire to the body? @cgudrian @LilahTovMoon @guenther @das_menschy it’s totally reasonable to assume something that stupid can’t happen. @LilahTovMoon @das_menschy @guenther @cgudrian can’t rule that out. Gotta get those clicks  @cgudrian @LilahTovMoon @rhymerepartee @cgudrian @LilahTovMoon RCD/GFCI/RCCB... every country uses a different acronym. https://en.wikipedia.org/wiki/Residual-current_device a cybertruck certainly is a very stupid car on so many levels. Nevertheless, the shown charging issue is most certain a fault of the wallbox or the installation at this home.  @adorfer @rhymerepartee @cgudrian @LilahTovMoon Ah, GFCI. Yeah, it's not required everywhere here (in the US). The main places where it is are outlets for kitchen appliances and hair dryers, but it is getting more common for them to be in other places of the house. |
@cgudrian @LilahTovMoon don't mix up static electricity / direct current (like in the video, 120V) with alternating current (230V in Germany and many other countries).