I’m not certified yet, so take this as a n00b question.(I’ve taken college level electronics, am an auto master tech, A+ certified computer tech)
I’m not sure the document/page I linked is easily understood for the question I want to ask.
My understanding is the reason we bond the neutral at the service panel instead of keeping them isolated from each other is that by bonding them we allow the return path to the AC generator or substation to use smaller conductors, saving utilities money.
And the result is a portion of load current from all subcribers/customers)takes a return path through ground to the substation or AC power source(powerplant) through ALL paths of low(relatively low) resistance…and this causes synthetic electrical currents to fluctuate in the earth ground. Based on load, based on conductivity, based on resistance in utility neutral.
If you live in an area with good ground condictibity like Santa Fe New Mexico, for example, a higher portion of the load neutral is returned to he substation via ground bonding than other areas with low conductivity?
I think I understand the concept of bonding, but wouldn’t it be safer for biology if we simply used larger (or lower resistance) utility line and service conductors so that resistance is always low, ground resistance is always high between the service entrance and earth ground of a building and the substation?
And just ground the housings at the substations, generators and subscribers for actual faults and lightening strikes?
The question is, did they cheap out and use inadequate conductors and bond the neutral at the service panel just to save money?
As an auto mechanic, it’s DC power and he chassis of the car is either negative or positive, and the car is insulated by the tires from Earth ground.
(Aside from some induction from steel belted tires)