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There is no precice reason why 4,700pf can be seen used on a lot os SMPS. This value is certainly used in volume, on a worldwide basis, and as such good low cost part price can be realized. 4,700pf is a good compromise between keeping the leakage current down whilst having a reasonable...

Oops - spotted the typo 20pcs should read 10 pcs In SMPS input filtering, there are Safety Class Y capacitors installed from both the live and neurtal terminals. There is a leakage current flow from the live-to-earth (also from the neutral-to-earth). The magnitude of which can be calculated...

In SMPS input filtering, there are Safety Class Y capacitors installed from both the live and neurtal terminals. There is a leakage current flow from the live-to-earth (also from the neutral-to-earth). The magnitude of which can be calculated very accurately by integrating the AC sinewave input...

The wire gauge and switch gear are all rated to handle this level of load. However, I do not know of a permissible level of unbalance. Is there a standard or rule (I've heard of a 10% figure, but am unaware of where this comes from)

Is there a USA or European standard to be followed in order to prevent an unbalance of current in a building installation? I have a "lot" of signle phase electrical computer equipment to connect to a 220VAC/240VAC utility supply. Each device consumes 300W of input power and I need to...