Timeline for Why did this device go bang?
Current License: CC BY-SA 4.0
10 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Sep 10, 2020 at 22:16 | comment | added | Sod Almighty | And no, I didn't do stupid things like wire N to E or any such nonsense. My only error was using screws that were too long, which bit into the (heatshrinked for safety) circuit and caused a short. | |
| Sep 10, 2020 at 22:14 | comment | added | Sod Almighty | There seems to be some confusion here. The device was wired correctly, except came from China with the metal chassis not earthed, because the Chinese are perfectly comfortable with the risk of fatal electrocution. I added an earth; and it's a good job I did, because when I reassembled the unit, I inadvertently created a short between the capacitor and the chassis. Hence the boom. | |
| Sep 10, 2020 at 20:16 | comment | added | Opifex | @SodAlmighty Earth connection? Please don't tell me you wired N to the PE? | |
| Sep 10, 2020 at 19:26 | comment | added | Sod Almighty | @Opifex you mean the lines might have been flipped inside the appliance, and I wouldn't have known? 'fraid not. I wired it myself - and incidentally, added the earth connection to this unsafe non-compliant piece of Chinese crap. It was my error that caused the bang, but also my forethought in earthing the metal chassis that potentially saved my life. | |
| Sep 10, 2020 at 10:11 | comment | added | TooTea | -1 Doesn't make any sense for the circuit in question. The short wasn't to ground, but to the negative DC rail. | |
| Sep 10, 2020 at 6:55 | comment | added | Opifex | @SodAlmighty If it weren't for The Channel, my country would neighbor yours. We have different plugs, but ours are also impossible to plug in backwards. But... that has nothing to do with reverse polarity. Because with AC... there is no polarity. Flipping the L and N in an appliance (important distinction! ), will not affect its workings whatsoever. So in your schematic, L and N could have well been reversed without you knowing it. It didn't matter anyhow. relative to each other, they would have been the same. | |
| Sep 9, 2020 at 20:20 | comment | added | Sod Almighty | @MarkoBuršič because I live in the UK, where matters of electrical safety are taken seriously. It is physically impossible to plug appliances in backwards. | |
| Sep 9, 2020 at 19:09 | comment | added | Marko Buršič | @mguima Yes you are correct. The cap potential is cca +160 VDC or -160 VDC whatever position you plug in. Make your answer. | |
| Sep 9, 2020 at 19:05 | comment | added | mguima | But a circuit like this would bang the same way, whatever was the Live and Neutral connection, doesn't matter if the plug was twisted or not. | |
| Sep 9, 2020 at 18:59 | history | answered | Marko Buršič | CC BY-SA 4.0 |