Telecom Grounding Calculator
Calculate grounding requirements for telecommunications installations.
Grounding Conductor Sizing (TIA-607)
| Application | Min Copper | Notes |
|---|---|---|
| Equipment Bonding | #6 AWG | Min per TIA-607 |
| Rack Bonding | #6 AWG | To TGB |
| TGB to TMGB | 3/0 AWG | Max 50 ft |
| Backbone (TBB) | 3/0 AWG | Between TGBs |
| Tower/Antenna | #2 AWG | Lightning protection |
Telecom Grounding Standards
TIA-607 Requirements
- TMGB: Telecommunications Main Grounding Busbar
- TGB: Telecommunications Grounding Busbar
- TBB: Telecommunications Bonding Backbone
- Max resistance: 25 ohms to earth (5 ohms preferred)
Best Practices
- Single-point ground reference
- Star topology from TMGB
- Minimize conductor lengths
- Use exothermic welds for permanent connections
- Test ground resistance annually