ok i'll play! if it is truely an 'upgrade' then the GEC required is probably larger, the old clamps are probably rusted, etc.] usually i find the old connections NG due to corrosion, and replace with new geased ( no-lox) clamps. The older ones usually do not 'jump' the meter, so in that sense they are NG also.
so why leave the old one anyhow? i don't get it? am i slow here? hey,if you were dropped on your head as a baby would it be your fault???
[This message has been edited by Webmaster (edited 06-07-2001).]
Many times one of the utilities has bonded to the original GEC with a split bolt and it was closed up in the wall or ceiling. can't always be sure if something is using it or not. I guess the question really is if there is any harm in leaving it?
Hey, what if all the 3 prong receptacles were installed on old 2 wire cable and bonded to that old GEC as it ran past. If you cut it all your Grounds are then NG (we're PG rated here).
What do you think?
[This message has been edited by Bill Addiss (edited 06-07-2001).]
I'm inclined to keep it too if I can't see the full length of it I can't tell if it's being used as a path by other things. I figure that even if it is disconnected or cut from one end (or too short to reach) it is still serving a purpose to 'other' bonded items if any should exist.
Well Bill, I don't see what harm it can do to leave the old GEC connected. I have done many service changes where the meter or the panel are moved.(As i am sure you have also)
I have utilized the old GEC and electrodes simply because i beleive more earth contact will achieve the 25 ohms or less ruling, and as you've stated, the possibilty of a backup.
GEC's can be installed in singular runs, so by code we could have as many seperate GEC runs as electrodes we desire.
If the original GEC has been installed correctly, the only possible parrallel path would be back to the serving utility X-former through common water or other mettalic lines in the event of a noodle faluire ( old ground, i know)
The event of a lighting strike or other power surge would, in theory, see ampacity divide among the many GEC's