Mike Dolt Enterprises
Mike Dolt Enterprises
User: hhsting, Location: Glen bunie, md, us
Asked on: Monday, May 31, 2021 at 10:45 am EDT
Answered on: Thursday, June 20, 2024 at 11:21 am EDT
Question: I have residential townhome. Each townhome has 200A service. I have incoming service utility cables coming into utility meter. Was wondering what is the typical size cable into utility meter for 200A service to size grounding electrode conductor, main bonding jumper?
Typical Cable Size for 200A Service Service Entrance Cable (SE Cable)
2/0 AWG Aluminum or 1/0 AWG Copper (Typically 3-conductor for single-phase service)
Grounding Electrode Conductor (GEC) and Main Bonding Jumper (MBJ)
The size of the grounding electrode conductor (GEC) and main bonding jumper (MBJ) is determined based on the size of the service entrance conductors, as follows
GEC
For Cu Conductors
Same size as service entrance conductors
For Al Conductors
Two trade sizes larger than service entrance conductors
MBJ For Cu Conductors
Same size as service entrance conductors
For Al Conductors
One trade size larger than service entrance conductors
Example for 2/0 AWG Aluminum Service Entrance Cables
GEC
250 kcmil Aluminum
MBJ
150 kcmil Aluminum
Additional Notes: The values provided are for typical residential applications. Local codes and regulations may vary. Always consult with a licensed electrician or local electrical authority for specific requirements in your area. The size of the utility cables coming into the utility meter should be the same as the service entrance cables. Flag for review