Not long ago I wrote an article on substation grounding for Electrical Business that raised the issue of whether one should interconnect the building reinforcing steel with the station ground electrode. A reader responded with the question of whether the best approach might be to ignore the rebar bonding.
Mexican electrical inspectors must now comply with accreditation, much the same as the ISO 9000.
As metal piping is being replaced by plastic piping, we're losing one of our best means of connecting electrical systems to the earth through low impedance.
In light of the 1999 Code changes, Phil Simmons takes a third look at multiple disconnects grouped in one location.