Grounding Wire Calculator
Size Grounding Electrode Conductors (GEC) per NEC 250.66
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How to Use This Calculator
Service Amps.
Get GEC size.
Understanding Grounding Wire Calculations
NEC 250.66.
Safety path.
Rods/Plates.
Bonding.
Formula & Calculations
Table Lookup based on Service Conductor
Key Factors to Consider
Copper vs Aluminum
Conduit protection
Water pipe bond
Ufer ground
Frequently Asked Questions
1200A service?
#4 Copper.