Original General Order 128 - Appendix A

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 26–D 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: 6–1/2 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.