Wire to Subpanel - through basement

[GRJack]

I'm installing a subpanel in an outbuilding behind our house. I will be
running 100 amps to it, off of our main panel in the house (200 A service coming into the house). I'm aware of keeping the neutral and ground separate on the subpanel side.

My question is:
From the main panel in our house, I will need to run the wire approx. 30 feet
in the basement, then it will go approx. another 30 feet underground (PVC
conduit) to the outbuilding. I am using Alum. SER. Can I just staple (well actually use pvc or metal C clasps) the SER to the underside of my basement floor joists (I have an unfinshed basement). Or, should I drill through each floor joist (middle of joist of course to not weaken it) and run the SER that way. It's Alum, so it bends easily. Or (sigh) do I need to PVC (or metal) conduit it to the underside of the floor joists. By the way, I upsized the SER (voltage drop tables said 2/2/2/4 was sufficient for 100 A over that length), but I got 1/1/1/3 instead, in case I need to conduit it to allow for the restriction on heat buildup that conduit theoretically creates).

By the way, I live it Connecticut, so if anyone knows CT code, that would be
good.

Thanks in advance for your reply.

[nickdel]

Don't know CT code, but the drilling option is obviously the best. If there a finished ceiling? Will there be? Is it a drop ceiling? You could put a runner on your joists - a strip of plywood wide enough for SEU straps across the joists the entire length of the run - and strap your cable to that.

[ActionDave]

You want to pull SER underground, through conduit?

[Cass]

Unfinished basement...I would attatch to the underside of the joists...

[bsperr]

I don't have a citation handy, but under the NEC, I think the requirement to support wires by drilling through joists or using running boards stops at a certain gauge (I think 8 gauge). So you should be fine with just stapling it.