Is there a limitation or dereating required when several conduit runs are grouped in ambient air gypboard vertical shafts inside a building? In particular, the local utility requires metering at the first level and in 30+ story high rise condos there are in excess of 300 conduit runs starting from the basement level going up and dropping off at 30+ levels.
Also, is there a minimum spacing required between the conduit runs? All runs will be 2" or 2-1/2" conduits.
I am assuming the vertical cable supports required approximately every 100' (or as listed in the code based upon wire size) are required to be accessible on the upper levels and installed in a separate pullboxes (since the units are to be sold not rented?) Comments?
Finally, is there any limitations aside from property line issues, ownership, physical space, etc routing several vertical conduit runs between common unit walls?
Also, is there a minimum spacing required between the conduit runs? All runs will be 2" or 2-1/2" conduits.
I am assuming the vertical cable supports required approximately every 100' (or as listed in the code based upon wire size) are required to be accessible on the upper levels and installed in a separate pullboxes (since the units are to be sold not rented?) Comments?
Finally, is there any limitations aside from property line issues, ownership, physical space, etc routing several vertical conduit runs between common unit walls?
