Grounding Main Panel

Electrical grounding has changed quite a bit thanks to the code requirements, bonding specifications, and electrode types flying around. As someone who has worked on electrical systems throughout my career, I figured out how to handle proper grounding. Today, I will share it all with you.

Why Grounding Matters

Probably should have led in this section, frankly—grounding provides a safe path for fault current and protects against electrical shock.

Grounding Components

• Grounding Electrode: Connection to earth (rod, plate, or Ufer)
• Grounding Conductor: Wire connecting panel to electrode
• Bonding: Connecting metal components together

Code Requirements

• Ground rods minimum 8 feet deep
• Supplemental electrode often required
• Proper sizing of grounding conductors
• Bonding of water pipes and gas lines

Main Panel Specifics

• Neutral and ground bonded at main panel only
• Grounding bar connection to enclosure
• Continuous path to grounding electrodes
• Sub-panels keep neutral and ground separate