[AT] grounds

[carl gogol]

I haven't seen anyone mention this yet, but the current practice connection 
to subpanels is 4 wire.  When my barn was wired about 5 years ago, the 
original feed  from the power-line to the first panel box is three wire and 
a two rod ground network just outside of the house is connected in the panel 
box..  The feed from there to the subpanel in the basement is 4 wire (two 
hot, a neutral and one connected to the ground network).  Then the added 
feed from that subpanel (and any subsequent subpanel) is also 4 wire.  Maybe 
this is the reason additional attachments to earth ground at subpanels are 
not desired / required.

Carl Gogol
Manlius, NY
AC One Seventy diesel
(2) AC D-14, AC 914H
Simplicity 3112 & 7116
Kubota F-2400