MattCr89
New member
- Location
- Pasadena, MD, USA
I curently have a 225A breacker 208Y/120V feeding (4) panels 225A at 208Y/120V. The feeder is in (1) 2 1/2" conduit with (4) #4/0 and #4 ground. My question is: Is this right?
Number of panels that can be fed off a 225A Breaker?
- Thread starter MattCr89
- Start date
- Status
- Location
- Chapel Hill, NC
- Occupation
- Retired Electrical Contractor
Look right to me at first glance. What do you think is wrong? I am assuming 4/0 copper at 75C. What insulation is the wire?
- Location
- Chapel Hill, NC
- Occupation
- Retired Electrical Contractor
I missed what you were asking. Does each panel have a separate run? Is there a tap involved? Give some more info on the install.
ptonsparky
Tom
- Occupation
- EC - retired
What is the calculated load? You could have 100 panels as long as the load(s) are small enough.
Sierrasparky
Senior Member
- Location
- USA
- Occupation
- Electrician ,contractor
No code limit to number of panels. Other codes may apply.
- Location
- New Jersey
- Occupation
- Journeyman Electrician
Could be right, could be wrong. The only real factor is the connected load. I've seen 42 circuit panels fed with a 30 amp feeder.
JoeStillman
Senior Member
- Location
- West Chester, PA
Sounds like a 4-story receptacle panel riser.
The loads on the panels are key. If its all receptacles, you can take the first 10 kVA at 100%, then the remainder at 50%. A 225A feeder has a continuous capacity of 180A (215.2(A)(1)), or 64.8 kVA. The maximum total receptacle connected load (220.44) you could have on this is 10 + 2x(64.8-10)= 119.6 kVA or 664 receptacles at 180 VA each (220.14(I)).
The loads on the panels are key. If its all receptacles, you can take the first 10 kVA at 100%, then the remainder at 50%. A 225A feeder has a continuous capacity of 180A (215.2(A)(1)), or 64.8 kVA. The maximum total receptacle connected load (220.44) you could have on this is 10 + 2x(64.8-10)= 119.6 kVA or 664 receptacles at 180 VA each (220.14(I)).
- Status