We will be doing a mega single family home that is a total of 4 floors.
The garage is poured slab on grade, but the others are pre-cast Post Tension slab between floors.
The architect & engineer want me to determine how many & what size conduit sleeves I will need for wiring between floors.
I'm having a very difficult time getting my head around this.
I plan to request 6" conduit sleeves (why not?), but I need to figure out how many 12/2 or 10/2 romex will fit in each. (I'll deal with larger appliance circuits separately)
Most of the panels, including all the lighting control panels are going in the 4th floor mechanical room.
I'm trying to determine how many 12/2 romex are allowed in a 6" sleeve @ 60% fill - (less than 24" between floors).
Is the following correct?
12/2 romex is 5/8" diameter (.3125 radius)
.3125 squared =.09765
.09765 x pi 3.1416 = .3068 sq. in.
6" PVC sched 40 @ 60% fill = 17.140
will allow fifty-five 12/2 cables?!?
That can't be right... is it?
Any other suggestions to keep me out of trouble on this are greatly appreciated.
The garage is poured slab on grade, but the others are pre-cast Post Tension slab between floors.
The architect & engineer want me to determine how many & what size conduit sleeves I will need for wiring between floors.
I'm having a very difficult time getting my head around this.
I plan to request 6" conduit sleeves (why not?), but I need to figure out how many 12/2 or 10/2 romex will fit in each. (I'll deal with larger appliance circuits separately)
Most of the panels, including all the lighting control panels are going in the 4th floor mechanical room.
I'm trying to determine how many 12/2 romex are allowed in a 6" sleeve @ 60% fill - (less than 24" between floors).
Is the following correct?
12/2 romex is 5/8" diameter (.3125 radius)
.3125 squared =.09765
.09765 x pi 3.1416 = .3068 sq. in.
6" PVC sched 40 @ 60% fill = 17.140
will allow fifty-five 12/2 cables?!?
That can't be right... is it?
Any other suggestions to keep me out of trouble on this are greatly appreciated.