HANDBOOK REQUIREMENTS - Central Maine Power Company
HANDBOOK REQUIREMENTS - Central Maine Power Company
HANDBOOK REQUIREMENTS - Central Maine Power Company
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Customers electing to install conduit for additional<br />
protection for direct buried cable will be required to meet all direct<br />
buried trench requirements unless the conduit used meets the<br />
<strong>Company</strong>'s conduit specifications for a continuous<br />
conduit system.<br />
912. BURIAL DEPTHS<br />
A minimum ground cover of 30 inches for cable<br />
operating above 600 volts phase to phase and 24 inches when<br />
operating at or below 600 volts phase to phase shall be provided.<br />
(Refer to Illustrations<br />
No.s 18, 19 and 20 in Section XII).<br />
Galvanized steel conduit or heavy-wall, non-metallic<br />
conduit (Schedule 40 or 80) shall be used under public streets<br />
or<br />
ways, paved areas, driveways and all transmission rights-of-way.<br />
It shall be placed at least 36 inches below grade and shall extend<br />
at least four feet beyond street limits or paved areas.<br />
Conduit placed under private driveways and walks shall<br />
be<br />
at least 30 inches below grade and shall extend at least 24 inches<br />
beyond the traveled way.<br />
Conduit may be used by the Customer outside public<br />
streets, ways, or paved areas and if used shall be galvanized steel<br />
or heavy-wall non-metallic at least 30 inches below grade for<br />
cable operating above 600 volts and at least 24 inches below grade<br />
for cable operating at or below 600 volts phase to phase.<br />
Where ledge excavation<br />
is necessary and subject to advance<br />
<strong>Company</strong><br />
approval, a reduction of cover may be allowed where<br />
supplemental protection is provided as permitted by NESC<br />
Section 352 D or NEC Sections 300.5 and 300.50.<br />
913. SEPARATION OF FACILITIES<br />
The separation of<br />
direct buried secondary or primary cables<br />
and<br />
ducts containing secondary or primary cable from all other