D!NNy
Senior Member
- Location
- San Luis Obispo
Hello,
Can some one explain how and why NEC mandates ground grid conductor burial depth to 30" minimum from the finished grade??
What if i have piping or some sort of obstacles along the ground grid routing can the depth be lowered than 30"?
does the ground grid needs to be 30" even if it is under the concrete slab??
Is it helping to maintain the earth resistance to 25ohms??
Thanks
Can some one explain how and why NEC mandates ground grid conductor burial depth to 30" minimum from the finished grade??
What if i have piping or some sort of obstacles along the ground grid routing can the depth be lowered than 30"?
does the ground grid needs to be 30" even if it is under the concrete slab??
Is it helping to maintain the earth resistance to 25ohms??
Thanks