2 ms·
What about common mode induction - when the inducted current flows in the same direction in all strands of wire (regardless of twisting) with earth return path?
by rini17 7y ago
What about common mode induction - when the inducted current flows in the same direction in all strands of wire (regardless of twisting) with earth return path? This is what AFAIK causes the problems with power transformers and can happen on long metal pipes too.
- londons_explore 7y agoCommon mode induction is an issue in any twisted pair system. As long as the DC impedance to ground anywhere is <500 ohms, I wouldn't imagine enough voltage to build up to break down even a tiny signal transformer. In power systems, the connection between neutral and earth does that. Long ethernet cables might be a concern, since the common mode DC impedance at the termination is normally infinite... Analogue audio equipment also frequently has infinite common mode impedance to prevent ground loops.
- spdustin 7y agoI really hope you take to heart the sources and links that people will respond with, and not just switch to defensive mode. This is a dangerous topic, and important to get right.