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General Order 128

 

Appendix B

 

Typical Illustrative Diagrams of Rules

 


 

These diagrams illustrate the requirements of certain rules and are to be used as a guide only for the application of such rules. Under no conditions shall these diagrams be given precedence over the rules as written.

 

Figure

No.

Title

1

Illustrative Diagram–Clearance and Depth Requirements for Supplyand Communications Systems       

2

Typical Residential Supply and Communication System–DirectBuried or Preassembled Cables–in–Ducts   

3

Typical Commercial Supply System–Cables Installed In Ducts   

4

Typical Communication System–Cable Installed in Ducts   

5

Cross Section–Random Separation of Buried Cable   

6

Cross Section–Supply and Communication System Concurrent Installations   

7

Cross Section Showing Independent Installations   

8

Cross Section–Permanent Cable Trench

9

Typical Manhole   

10

Separation of Supply and Communication Systems–Handholes   

11

Typical Single–Phase Pad Mounted Transformer (A) Two Primary Bushings for Line-Line Connection
Typical Single–Phase Pad Mounted Transformer (B) One Primary Bushings for Line to Neutral Connection

12

Typical Three–Phase Pad Mounted Transformer

13

Typical Joint Supply and Communication Pedestal

14

Typical Low Voltage Service Termination at Building (A)
Typical Low Voltage Service Termination at Building (B) (Alternate to (A) for Recessed Connection Enclosure)

15

Typical Extent of Ownership Within Buildings to Which These Rules Apply

16

Grounding of Transformer Windings

17

Typical Subsurface Equipment Enclosure

18

Typical Transformer Installation in Subsurface Equipment Enclosure