vinod
Senior Member
- Location
- Saudi Arabia
i am working in Saudi Arabia.
We installed a new grounding grid with 4 number of grounding electrode for a new substation. and we are using PVC insulated direct buried ground cables.
our project spec says;
"sufficient grounding electrodes shall be installed to obtain a maximum electrode resistance to earth of 5 ohms. resistance to each equipment like Switch gear, transformer, etc shall be below 1 ohm"
What does it means.
Did we need each electrode <5 ohm or all these 4 electrode connected together?.
if you have any reference for the subject please help me
Vinod:?
We installed a new grounding grid with 4 number of grounding electrode for a new substation. and we are using PVC insulated direct buried ground cables.
our project spec says;
"sufficient grounding electrodes shall be installed to obtain a maximum electrode resistance to earth of 5 ohms. resistance to each equipment like Switch gear, transformer, etc shall be below 1 ohm"
What does it means.
Did we need each electrode <5 ohm or all these 4 electrode connected together?.
if you have any reference for the subject please help me
Vinod:?