General Order 128
Section
III
Requirements for Supply Systems
32.7
Covers
Manholes, handholes, and subsurface equipment
enclosures while not being worked in, shall be securely closed by covers of
sufficient strength to sustain such loads as may reasonably be imposed upon
them and arrangements shall be such that a tool or appliance shall be required
for their opening and cover removal. (Also see Rule
17.8, and Appendix B, Figs. 9 and 17.)
If the cover of a subsurface equipment enclosure is a grate a means shall be
provided to prevent tampering with the equipment housed therein.