Post ADyHGa5tefuxSFIFH6 by wauz@muenchen.social
(DIR) More posts by wauz@muenchen.social
(DIR) Post #ADyGKPV0t9nBncIs9A by SetecAstronomy@hackers.town
2021-12-01T20:23:50Z
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Have I shared this before?Not really sure where it came from, but it is now on my wall of shame.
(DIR) Post #ADyHGa5tefuxSFIFH6 by wauz@muenchen.social
2021-12-01T20:36:12Z
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@SetecAstronomy
(DIR) Post #ADyImLtA6cJAcO3Abw by SetecAstronomy@hackers.town
2021-12-01T20:46:15Z
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@wauz It's fine. The smoke hasn't come out yet. The users aren't electrified to the point where they can't let go of the product. Just keep using it. /sBut seriously, cut the ends off and throw it away.I've had multiple run-ins with power supplies that were very unhappy to discover they did not have a proper ground. They did things like dump lots of AC into all the metal bits, and then it starts showing up in strange places that it shouldn't. "Why is this low voltage DC device shocking me with what feels like 60Hz AC?" Cause some dingus spliced a non-grounded plug into the extension cord and since I was just a guest in the shop, I had no idea."Why is this PC case shocking me?" Cause one half of that duplex outlet wasn't grounded anymore and I hadn't realized it.So yeah.... cords like that, they scare me. Maybe not in my own hands. I know better than to use it in anything but a "I need to test this in a weird way" scenario. But what if someone else wanders in and grabs it when I'm not looking?
(DIR) Post #ADyKP6c8vhYKUd8Hsu by wauz@muenchen.social
2021-12-01T21:11:22Z
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@SetecAstronomyWe have 50 Hz 230 V ac supply here. The plug going into the transformator is in German a 'KaltgerÃĪtestecke', a plug for non-thernal load devices.Any device coming to German market must pass a conformity test.Actually, the both the bolts are suitable for the tension or 0 potential.The stripes at the side is additional safety grounding.We also have mandatory so called FI-switches, that detect potential difference between loop-back 0 and PE safety line.No dc allowed with that
(DIR) Post #ADyLOhCfVTMHdXaMt6 by SetecAstronomy@hackers.town
2021-12-01T21:22:29Z
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@wauz Here in the US, from what I can tell it's fairly common to only have current fault detection on specific circuits. Bathroom, kitchen, outdoor outlets. Often it's implemented with just a receptacle that the rest in that room/area connect to, instead of a circuit breaker.As far as I know, there is no requirement to detect DC faults. Interestingly enough, if you have DC current leaking into a GFCI/RCD it will have a negative impact on the sensitivity to AC leakage.I believe in the UK, there is a requirement for RCDs on permanent electric car chargers to detect and trip for both AC and DC current leakage.If you use YouTube, Big Clive has a number if interesting videos on circuit breakers, as well as a look inside a cheap plug-in electric car charger.