Just need a refresher here.
3 phase, parallel 500mcm service.
Total of 6 ungrounded conductors.
Is a 3/0 Gec from building steel to service equipment, the correct size?
2X500mcm=1000.
Next question, Is the best way to install a GEC to a 480x208/120Y sds, is to run it with the feeders to the transformer, or just run the feeders alone and run a GEC to the buiding steel.If it is run with the feeders, is has to be sized for the secondary, correct?
Dnk....
