Minimum separation for OSP conduit in a trench
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Minimum separation for OSP conduit in a trenchExpand / Collapse
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Posted Tuesday, April 15, 2008 2:48 PM
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Hello all,

I am looking for the min. separation of conduits in a trench.  My customer is having >5kVA electrical and UTP in the same trench and would like to know how far to keep them apart.  Both will be in conduit.

Thanks

Post #1073
Posted Wednesday, April 16, 2008 12:23 PM
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I believe the code in my area is at least 12 inches of separation from secondary electric power, when placing in a joint trench, and placing catv, phone, or data on top of electric power.

Future Technology Consultants
New York, New York
Post #1078
Posted Wednesday, April 16, 2008 1:02 PM
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smorse (4/15/2008)
Hello all,

I am looking for the min. separation of conduits in a trench.  My customer is having >5kVA electrical and UTP in the same trench and would like to know how far to keep them apart.  Both will be in conduit.

Thanks

 

These are the required separations per the NESC:

Separations Between Supply and Communication Conduit Systems

Conduit systems to be occupied by communication conductors shall be separated from conduit

systems to be used for supply systems by

a. 75 mm (3 in) of concrete

b. 100 mm (4 in) of masonry

c. 300 mm (12 in) of well-tamped earth

EXCEPTION:

Lesser separations may be used where the parties concur.

Regards,

John Hamilton

Post #1080
Posted Saturday, April 19, 2008 10:03 PM
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Eric is indeed correct. Code says 12 inches minimum

john adams

Post #1108
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