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Original General Order 128

 

Appendix A

 

Summary of Dimensions, Clearances and Depth Requirements

 


 

Table 2    Miscellaneous Dimensions and Clearance Requirements for Supply and Communication Systems

 

Case No.

Nature of Clearance or Depth

Requirements

Reference Rules

1

From railroad tracks, of risers and other above-ground terminations

General Order 26D and 118

31.5-D , 33.5-D , 41.5-C , 43.4

2

Size and shape of manholes

Minimum inside dimension shall be 4 feet by 5 feet high. See Public Utilities Code, Section 8051 for specific requirements

32.4 , 42.4

3

Manhole openings

Not less than 26 in diameter or 26 x 24 rectangular

32.5 , 42.5

4

Manhole location

Manhole openings shall not be less than 3 feet from any railroad rail

32.8 , 42.8

5

Sectionalizing Switches

Maximum height of operating handles and viewing windows: 61/2 feet

34.2-B

6

Oil filled equipment

From building surface: 3 feetFrom non-combustible building surface: 2 feet

34.3-D

 

Dimensions and clearances shown may be reduced under certain conditions - see referenced rules.