Looks like a Y, sounds like a Y is spelled like a Wye. 
That’s why I use certified ‘wide range’ AC/DC adaptors if possible.
But some of my equipement requires a 16A plug.
You can never rely on the wiring of wallplugs.I found it several times in Germany, that the blue and the yellow/green had been connectes INSIDE the wall outlet.But this is not considered for the certification of a product.
Ah, bye the way, the color of the AC wiring is important for certification - and not the same worldwide. Even the european yellow/green is NOT the same as the US green/yellow!
I commonly see that in retrofits on older installations which didn’t originally have an earth wire. I think you’re supposed to convert TN-C to TN-C-S in the breaker box, but of course you can’t do that if you don’t change the wire too (it’s often directly plastered into walls (remember, Europeans usually live in brick/concrete houses) as conduit only became popular later), so doing this is still pretty common when retrofitting (which might or might not be legal …).
But why would that be a problem?
On an unrelated note, I only recently learned that it’s common in some Belgian cities to have 3 phase distribution with 230 V phase-to-phase (some 130-odd V live to neutral). An individual apartment then has 2 phases and no neutral brought in. Apparently it was chosen in the olden days to save wire and conversion to normal (230 V/400 V) three phase happens only when the distribution equipment is being replaced.
This is no problem as long as the network is healthy. This is called “nulling” in Germany. I’m no power expert but imagine a short N-L1 far away, let’s say at the transformer station. N would be tied up to half of L1 and thus become dangerous. In earlier times it was also common to connect earth to a water pipe or a heating pipe until plastic pipes tended to become common…
First, we should not discuss the reason for safety rules in this topic. Old cars have no safety belts and you may end up as dead as an electrician doing maintance on false house installations.
If you want to get your product certified for selling it NOW, you have to stick to the rules.
PS: I lived for some time in an old house, build 1892. When you unconnected the refrigerator in the kitchen, the lights went off in the living room.
Vidalv, I noticed just now while scanning old posts, you should URGENTLY remove the copper fill since it reduces your isolation! Also, adjust the rightmost DC track (on the backside) to keep clearance!
Every net in touch with AC mains must be, as I always say, 8mm apart from low voltage tracks. Some People say 5mm is ok, well, but you have hardly one.
This topic was automatically closed 90 days after the last reply. New replies are no longer allowed.