A 75kVA transformer receives a 480V primary feed through one 1-1/4 inch conduit containing three number 3 copper conductors and one number 8 copper ground. The secondary steps down to 208Y/120V and feeds panel LDD1 via one 2-1/2 inch conduit containing four 250 kcmil aluminum conductors and one number 4 aluminum ground. The system features a short circuit current rating of 3.4kA and a grounding connection using a number 2 conductor.
T 75KVA XFMR LDD1 480V PRI 208Y/120V SEC #2 PANEL LDD1 1 (1)1-1/4"C 3#3 CU, 1#8 CU GND (1)2-1/2"C 4#250 KCMIL AL, 1#4 GND AL ISC = 3.4KA
Members view this detail in full resolution, download the CAD files (SVG, PDF), and can adapt it in the built-in CAD editor — export DXF, DWG, or PDF.
Start membership