Temporary Protective Grounds
Temporary Protective Grounds
(OP)
Where is a good location to purchase temporary protective grounds?
I've read IEEE 1246-1997 and will need 350KCM copper for the available fault current and X/R ratio.
Are the clamps usually sold separate? If so, can I combine copper wire and aluminum clamps? What precautions do I need to take to prevent galvanic corrosion?
Why is copper recommended? Can I use aluminum since it's lighter for a given conductivity?
Do many utilities use undersized cable for this application just to prevent induced voltage? Sizing it for fault current with the 350KCM cable will make the grounds heavier than desired.
Thanks!
I've read IEEE 1246-1997 and will need 350KCM copper for the available fault current and X/R ratio.
Are the clamps usually sold separate? If so, can I combine copper wire and aluminum clamps? What precautions do I need to take to prevent galvanic corrosion?
Why is copper recommended? Can I use aluminum since it's lighter for a given conductivity?
Do many utilities use undersized cable for this application just to prevent induced voltage? Sizing it for fault current with the 350KCM cable will make the grounds heavier than desired.
Thanks!






RE: Temporary Protective Grounds
http://www.pbsigroup.com/userfiles/file/datasheets...
Regards
Marmite
RE: Temporary Protective Grounds
RE: Temporary Protective Grounds
I believe Chance's clamps are dual rated Aluminum clamps-which should do just fine.
The utility I used to work at didn't undersize their grounds. It is a safety ground after all-Designed to protect the lineman working on that dead line should it inadvertently become energized.
RE: Temporary Protective Grounds