I did some Google searching and came up with the following:
http://www.iccsafe.org/cgi-bin/ultimatebb.cgi?
ubb=get_topic;f=11;t=001341
I think it's going to be a pain no matter what you do, but running
the ground wire exterior to the building doesn't seem like a great
idea to me.
73!
Dan KB6NU
----------------------------------------------------------
CW Geek and MI Affiliated Club Coordinator
Read my ham radio blog at http://www.kb6nu.com
LET'S GET MORE KIDS INTO HAM RADIO!
On Nov 25, 2007, at Nov 25, 3:20 PM, Ken Kopp wrote:
My older home .... built in 1962 by an individual for himself ...
has only 2-wire Romex. At least it's not
single conductor "knob-and-tube wiring. Nothing in the
house ...water pump, water heater, forced-air heat blower, etc. is
"three-wire". (;-(
It's a 2-story structure and it's virtually impossible to rewire to
meet present-day electrical codes without tearing off the interior
wallboard and starting over.
The only way I can see to fix the problem would be
to drill completely through the wall to the outside at every outlet
and add the "green wire" on the outside of the building and return
the resulting "buss" to the entrance panel's ground. A decidedly
"ugly" solution,
even if painted to match the exterior color and doesn't
solve the issue of outlets on interior walls. I -have-
replaced all outlets with "3-wire" types to avoid the usual cut-off-
the ground-pin from household appliance
plugs, but there's nothing connected to the round holes. (;-)
Cutting groves in the wall board from each outlet down to the floor
and hiding the ground buss under the kick-
board is possible but again, "ugly". The walls have been painted
of course and the kick-boards are stuck to the wall by paint.
Removing the kick-boards would damage the wallboard and still
require its replacement.
There seems to be no realistic solution ...
I built my shack, garage and shop onto the house and they -DO- meet
all codes. There is a dediacated breaker panel feeding this
addition and there are 17 ground rods on 2 acres, all bonded
together with #10 CU buss wire and tied to the RF and AC entrance
ground. Two-inch
CU strap runs inder the wall into the shack and along
the back of the desk with 1/4" brass bolts with wing-nuts
for each piece of equipment.
I'm retired from an electric utility.
73! Ken Kopp - K0PP
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