Quote:
Originally Posted by copiapoa  Sense of grounding or shielding in that has fast break down a safety fused.That it has occurred on the chassis there should be a zero potential. In devices HCL the zero on the chassis gets from a pin a minus of the first capacitor in PS.The metal case 7808 is a point shielding.Therefore at lifted upwards GROUD LIFT from the IEC the zero potential does not vanish anywhere.That's all. |
That's it. You clearly do not understand the difference between signal ground and safety ground, which I find utterly horrifying. From now on I assume you take part in manufacturing these things, since you specify a lot of details in how they are connected.
The grounding point for the signal ground you're speaking of is perfectly fine. It's a common practice to keep the star ground point at the first filter capacitor, and tie this point to the chassis. If I understand you correctly, this point can not be lifted, which is OK, too.
But the ground lift switch @ the IEC connector cuts the connector's safety ground lug to the chassis - the exact point which is important. After this is done, the safety ground is not referenced to anything, and the neutral at the breaker box doesn't know if the chassis is on mains potential or not.
Quote:
Originally Posted by copiapoa In Ukraine the ohm law learn in the sixth class |
Getting back to this older post, I would like you to explain in your Ohms Law why you specify the same size of a fuse for both US mains (120v) and European mains (230v)?