Medium voltage's in same manhole

[jjmeggo]

I have a project that will have 13.2kV and 34.5kV conductors routed though-out a port facility. Due to space restraints, Can the 13.2kV and 34.5kV conductor be routed through the same man-hole provided the conductors installed on different racks? The manhole will be a minimum of 6ftx12ftx6ft high. Both medium voltage consuctors would enter the same side and exit the same side with the exception of the 13.2kV would enter and be routed to the left and the 34.5kV would enter and route right. I kinda know the answer but have not been able to locate the real answer except for NEC 300.3(C)(2)(e). Thanks in advance for any input.

 

[Julius Right]

In NEC 2014 no art NEC 300.3(C)(2)(e) as in NEC 2011 but 300.3(C)(2)(d) is now instead of.:happyyes:
(d) In manholes, if the conductors of each system are permanently and effectively separated from the conductors of the other systems and securely fastened to racks, insulators, or other approved supports, conductors of different voltage ratings shall be permitted.
The manhole minimum dimensions meet NEC art.110.72 and NESC 323.
In my opinion [and my experience] if the cable trays are provided in manhole- solid bottom anti-corrosive painted aluminum [or galvanized steel]- the cables have to be run in separated trays.
IEEE 141 12.5.5 Cable tray recommends:
In stacked tray installations, it is good practice to separate voltages, locating the lowest voltage cables in the bottom tray and increasingly higher voltage cables in ascending order of trays.