- A = 30" x 4"
- B = 24" x 4"
- C = 18" x 4"
- D = 12" x 4"
- E = 6" x 6"
- F = 9" x 4"
- G = 4" x 4"
- H = 9" x 6"
- I = 6" x 4"
- A = Tunnel Aisle Cable Trays
- B = Bldg No., e.g. 118
- ESP = East Straight Penetrations 1 - 4
- EW = East-West Cable Trays
- G = Girders No. 1 thru 18
- P = Shieldwall penetrations 1 thru 99
- R = Inside Ring Cable Trays
- RY = Research Yard
- WSP = West Straight Penetrations 1 - 4
- 10 = PEPII Region 10
- A = AC Power
- AF = AC Power and I&C Cables
- F = Instrumentation and Control(I&C) Cables
- FG = I&C Cables and DC Cables
- FGP = I&C Cables, DC Cables and High Voltage Cables
- FP = I&C Cables and High Voltage Cables
- G = DC Cables
- GP = DC Cables and High voltage Cables
- P = High Voltage Cables