Wouldn't it be a major safety issue to not have one if the subpanel is in a far away building? In that case you could be shocked by something that's "grounded" because the potential of the ground at the building isn't necessarily the same.
Wouldn't it be a major safety issue to not have one if the subpanel is in a far away building? In that case you could be shocked by something that's "grounded" because the potential of the ground at the building isn't necessarily the same.
Potential can only be measured by a digital meter.
No current can flow unless a circuit is completed.
Other than a static discharge. There is no Hazzard (Assuming that the wiring is done correctly) unless there is a nearby lightning strike. Then all bets are off. (It goes wherever it wants)
Yeah… they never really stated THIS IS THE REASON did he?
I think it is for two reasons, but mainly it is to prevent ANY voltage intentionally flowing on the grounding conductor.
If the neutrals and grounds were on the same conductor, all 120V circuits in the panel would have current flowing on the grounding conductor.