Greg Freemyer wrote:
But here the GFCI is only used after the circuit breaker. James can correct me, but I am fairly sure any current flowing in the neutral lines inside a building is transferred to the ground at the circuit breaker and from there it flows to the outside ground/earth/dirt.
Correct
I am 100% sure that the outside ground/earth/dirt is connected to both that inside ground lines and the neutral lines at the circuit breaker panel.
I am not 100% sure there is not also a copper neutral return line to the power company, but I don't think there is.
The power lines use the ground, though there may not be a separate ground conductor. The power network is 3 phase, which does not require a ground to operate, though it may be connected with a wye configuration that has a common point for the 3 phases. With delta configurations, there is no common point to ground. When the power is distributed to homes, there will be a transformer connected to one phase, with a centre tapped 240V secondary winding connected to the homes. The centre tap is grounded. BTW, the power lines are often aluminum or aluminum over steel core with suspended cables. -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org