If these are entering or passing through fire-resistive construction (fire walls, fire barriers, smoke barrier walls, fire partitions) and you are under the UBC or the IBC, you must meet the requirements of those codes. Basically, you must use a listed (ASTM E814 or UL1479) fire stop system or an alternative (concrete, ...)that has been approved by the Building AHJ. The fire stop systems all have, as part of their installation instructions; specific components, spacing, thicknesses, number of conduits and diameters, sleeving, and other requirements that must be followed to achieve the proper result---that of stopping fire, combustion gases, heat and/or smoke. Please don't just throw some red gunk up there and call it good.
Hilti and the other manufacturers will even come to the job site and help you get the right product and get it installed per the Listing.
We take great pride in this Forum in doing safe installations, per their electrical listings, and discuss all the in's and out's of getting it right; and accept criticism when we're brave enough to put photos of our work up. Let's get the fire-stopping details right. In a fire situation, it makes a big, big difference on the spread of fire, gases, etc.
