TM
5-811-1/AFJMAN
32-1080
SINGLE DUCT
ELECTRIC OR COMMUNICATION
DUCT BANK
ELECTRIC AND COMMUNICATION
DUCT BANK
REINFORCED DUCT BANK
NOTES:
A. ELECTRICAL SUPPLY DUCT:
ARRANGEMENTS. SIZES. AND DIMENSIONS SHOWN ABOVE WILL CONFORM TO THE REQUIREMENTS
OF NFPA 70.
B. ENCASEMENT DIMENSIONS ARE TO BE DETERMINED BASED ON LOCATION. BURIAL DEPTHS.
AND STRENGTH REQUIREMENTS.
C. COMMUNICATIONS SUPPLY DUCT:
SEPARATIONS ARE DEPENDENT ON COMMERCIALLY AVAILABLE DUCT SPACERS FOR THE
RESPECTIVE CONDUIT SIZE.
D. ANSI C2 MINUIMUM SEPARATION FOR SUPPLY-COMMUNICATION IS 3 INCHES CONCRETE.
Figure 7-2. Concrete Encased Duct Details
7-8
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