My experience was similar to Ted's. I built a major addition to my home two years ago. It required a major (read - expensive) electrical upgrade replacing a 200 Amp meter base with 350 Amp system. The old "cold water pipe" ground system was cut out and replaced with two eight foot, galvanized rods driven at least three foot apart and connected to the meter box neutral bond point with #4 AWG bare copper wire. I also have another eight foot ground rod back at my amateur radio room which serves for lightning protection and noise ground but it does not connect to the electrical system neutral in accordance with local codes which permit only a single point ground to the electrical system at the entrance panel(s). Incidently, the preferred ground rod for heavy duty service around here is not copper, but galvanized steel - eight foot long by about 3/4" diameter. To drive them in the local soil which is hard, yellow clay (sometimes called 'hardpan'), about the consistency of soft sandstone) one takes a Coke bottle of water and jabs the rod into the soil(?) a few inches, fill the hole with water and keep jabbing. Bob Smith ted@.......... wrote: > > We just upgraded our home electrical service from 60 amp to 200 amp, put in > new meters, new breaker box, and so on. Code now requires that the meter > box be separately grounded outsided the house via its own ground wire (bare > copper stranded, very heavy maybe #4?) to two six-foot copper rods in a > daisy-chain arrangement. Driving these was a chore - they don't call this > the Granite state for nothing. > > This is in addition to the normal ground to the water pipe inside the > house. > > Could this lead to the same kind of voltage drop you mentioned? > > Regards, Ted Blank > > __________________________________________________________ > > Public Seismic Network Mailing List (PSN-L) > > To leave this list email PSN-L-REQUEST@.............. with > the body of the message (first line only): unsubscribe > See http://www.seismicnet.com/maillist.html for more information. -- --------- Avoid computer viruses -- Practice safe hex ------------- * * Specializing in small, cost effective embedded control systems * * Robert L. (Bob) Smith Smith Machine Works, Inc. internet bobsmith5@.............. Lumlay Road landline 804/745-1065 Richmond, Virginia 23236+1004 __________________________________________________________ Public Seismic Network Mailing List (PSN-L)
Larry Cochrane <cochrane@..............>