mddorogi
Member
- Location
- Ann Arbor, MI
I'm designing a PV system for a building, and was given a set of drawings (25 years old). The building is a senior housing center, 2 stories with perhaps 80 units.
These drawings indicate that the service is 208Y/120V and that there are 1000A and 600A disconnects coming in.
Each unit has its own meter, and there's a house meter that we would connect the solar behind.
The house meter runs two service panels, which on the drawings are also indicated as 208Y/120V.
The trouble is that I got a picture of the label on one of these two service panels; it's 400A and says "240/120 3ph 4W Delta B Hi".
Also I've found that the labels on the 1000A and 600A main disconnects indicate 240V 3Ph 4W.
(The other service panel has no labeling as to what the service is, but both panels are fed from the same tap box).
I'm trying to figure out which service it really is.
Either the drawings are wrong, or the labeling is wrong, neither of which is very comforting.
The two panels are pictured here. The one on the right is the one with the label indicating 240/120 high leg delta.
Both panels have 1p, 2p, and 3p breakers in them.
It's a little hard to see, but there are lots of 1p breakers (15A lighting circuits) adjacent to each other, in both panels.
Wouldn't this be impossible if it was a 240V delta high leg service?
If it was, one phase to neutral would be 208V and the 1p breakers would have to skip spaces?
These drawings indicate that the service is 208Y/120V and that there are 1000A and 600A disconnects coming in.
Each unit has its own meter, and there's a house meter that we would connect the solar behind.
The house meter runs two service panels, which on the drawings are also indicated as 208Y/120V.
The trouble is that I got a picture of the label on one of these two service panels; it's 400A and says "240/120 3ph 4W Delta B Hi".
Also I've found that the labels on the 1000A and 600A main disconnects indicate 240V 3Ph 4W.
(The other service panel has no labeling as to what the service is, but both panels are fed from the same tap box).
I'm trying to figure out which service it really is.
Either the drawings are wrong, or the labeling is wrong, neither of which is very comforting.
The two panels are pictured here. The one on the right is the one with the label indicating 240/120 high leg delta.
Both panels have 1p, 2p, and 3p breakers in them.
It's a little hard to see, but there are lots of 1p breakers (15A lighting circuits) adjacent to each other, in both panels.
Wouldn't this be impossible if it was a 240V delta high leg service?
If it was, one phase to neutral would be 208V and the 1p breakers would have to skip spaces?
