Arcing completes a circuit -- closes a system -- between two voltage potentials. When arcing occurs, two oppositely charged static voltage potentials can cancel each other out. The arcing problems that occur are usually between two electrically isolated voltage potentials pressures necessary to hold a charge and they are part of the same circuit -- completes a closed system.
Anyone or anything that is not part of the closed system can touch an element of that circuit without affect. An example of this is a sparrow on a high voltage power line. A sparrow can sit on a high voltage power line because the sparrow is not part of the circuit. With an eagle or hawk however, it is a different story. It is common for these birds to get 'zapped' when there wings bridge two high voltage power lines. They become a part of the closed system. Some questions raised here are: What if charges are induced in to the opposite ends of an electrically neutral conductive mass, a closed system? What if the holding charge is not induced from the outside (Figure A) but from within an object (Figure B)? (Thereby, inducing and locking in an electric field condition within a electrically polarized closed system.) What happens if an electrically neutral conductor becomes radically electrically polarized? Would it act like an electric field magnet? How much charge is needed to produce a significant physical application? There is a spatial relationship involved between a core charge with its surrounding charge and an outside charge coming into close proximity ot them. There is a distance where the surrounding charge's closer proximity to an outside charge has a greater influence than the core charge. (This is what makes solid matter 'solid', the repulsion of electron shells)...