mopowr steve
Senior Member
- Location
- NW Ohio
- Occupation
- Electrical contractor
Have a set of plans that show a 400amp(320a continuous) meterbase w/ 2- 200amp main OCPD's serving 2 buildings as one occupancy.
Plan examiner approved plans allowing #4 cu to waterline for GEC
Inspector says that it needs to be a 1/0
I did have doubts myself but I'm not 100% sure that the #4 was in fact OK since either disconnect is only 200amp. I understand that it goes by the max equivalent size of undrounded service conductors but not sure that the intent is for the service conductors feeding the meterbase section as the factory service conductors feeding OCPD's are 3/0. I guess I would not concider them paralleled unless they landed on 1- 400 amp OCPD not in this case where they are 2- independent service disconnects. So aren't we really sizing this particular GEC to trip the 200 amp breaker if a fault would occur?
Whats the difference if some one say has a 4 gang meterbase fed with 500mcm then comes out the bottom, mounts there own 200amp disconnects, and runs #4 for GEC to those~?
Plan examiner approved plans allowing #4 cu to waterline for GEC
Inspector says that it needs to be a 1/0
I did have doubts myself but I'm not 100% sure that the #4 was in fact OK since either disconnect is only 200amp. I understand that it goes by the max equivalent size of undrounded service conductors but not sure that the intent is for the service conductors feeding the meterbase section as the factory service conductors feeding OCPD's are 3/0. I guess I would not concider them paralleled unless they landed on 1- 400 amp OCPD not in this case where they are 2- independent service disconnects. So aren't we really sizing this particular GEC to trip the 200 amp breaker if a fault would occur?
Whats the difference if some one say has a 4 gang meterbase fed with 500mcm then comes out the bottom, mounts there own 200amp disconnects, and runs #4 for GEC to those~?