Capacitive Coupling in 14 words:
Current in wire 1 causes magnetic field. Magnetic field causes current in wire 2.
Actually the wires can also "transfer" current because of the charge on one wire affecting the charge on the other (the like charges repel and opposite charges attract thing). It's probably both the magnet field thing and electrical charge thing that makes it happen but you asked for brevity.
And the charge that "accumulates" on the bus bar isn't capacitive "coupling" although it does happen because the system acts like a big capacitor. The grounded set of wires acts like one capacitor plate and the hot wires running along side those act like the other capacitor plate.
I like your questions. What's your story? What do you do? Why all the questions?
[This message has been edited by maintenanceguy (edited 12-27-2001).]
