Original General Order 128
Requirements For Supply Systems
42.4 Size and Shape
Manholes shall be constructed to provide sufficient working space so that the cables and equipment therein can be properly and safely installed, supported, operated, and maintained.
Manholes shall not be constructed with smaller dimensions than those required by Public Utilities Code, Sec. 8051. (Also see Appendix B, Fig. 9)
Handholes shall be of sufficient size to house safely the required cables, splices, connectors and associated apparatus. Cables shall be arranged so that they can be safely installed and maintained.