Copper
| Entrance Size | Wire Size | Neutral | Conduit per NESC and NEC | Copper Clad Ground Wire | Ground Rod |
|---|---|---|---|---|---|
| 100 amp | #4 | #6 | 1 and ¼ inches | #6 | ⅝ inches by 8 feet |
| 200 amp | #2/0 | #1/0 | 2 inches | #4 | ⅝ inches by 8 feet |
| 320 | #350 MCM or two 2/0 to two 200A panels | #250 MCM or two #1/0 to two 200A panels | 2 and ½ inches | #2 or two #4 to single rod | ⅝ inches by 8 feet |
Aluminum
| Entrance Size | Wire Size | Neutral | Conduit per NESC and NEC | Copper Clad Ground Wire | Ground Rod |
|---|---|---|---|---|---|
| 100 amp | #2 | #4 | 1 and ¼ inches | #6 | ⅝ inches by 8 feet |
| 200 amp | #4/0 | #2/0> | 2 inches | #4 | ⅝ inches by 8 feet |
| 320 | #500 MCM or two #4/0 to two 200A panels | #350 MCM or two #2/0 to two 200A panels | 3 inches | #2 or two #4 to single rod | ⅝ inches by 8 feet |
Note:
- Grounding must be provided per the National Electric Code
- Reference service entrance rating requirement for entrance cable per the National Electric Code
- Panel cover must be installed before service can be energized
- Any exceptions must be approved by the local building inspectors