The ground being the suspension wire... every residence I've lived in has had three cables and the suspension wire that the cables are wrapped around is grounded. My apologies for not clarifying that.GENIERE said:Unless it’s due to a weird local electrical code you will be hard pressed to find a 4-conductor cable from the utility xformer to the residence, as the grounding conductor doesn't exist. The utility provides a neutral conductor and two "hot" conductors only. With an additional grounding conductor you would only provide a parallel path for neutral current since the safety ground and neutral conductor are bonded at the residences service entrance.
Good question. In a nutshell, no. There was a good show on either Discovery or Learning Channel a couple months back that focused on the maintenance that has to be done on high-tension power lines... the workers for the most part have to work on live power lines and the hard part is getting them to the same potential as the wire they are working on. Once they are on the wire, they are relatively safe (bearing in mind they are hundreds of feet off the ground) unless they come in contact with another wire or any object of different potential.exequor said:No, wrong question. the question should have been if you hold onto the live wire (with both hands or one) and you are not grounded, would you get shocked?
IIRC domestic American phases are three phase, 60Hz in a delta transformer configuration... the neutral doesn't come into play until one gets to the residential subgrids... a neighborhood may only see two phases, depending on the load and such. Of course, there are industrial sites that require all three phases.
Now, on a ship that creates its own power, the system is three phase wye configuration... the hull has to be set as the ground, but it's floating (literally and figuratively). So if one were to measure the ac voltage between, say neutral and ground in the shipboard system, one could find a good 85vac potential there because the neutral is not necessarily tied to the ground (in this case, ships hull). It's enough to drive electrical engineers nuts.
This is a very entertaining discussion, thanks, guys.