Conduit and attic trusses

[smalltown]

I'm running conduit in my garage attic. I have seen what mice can do to wiring. The access is by hatch and ladder.

There is only 3" of insulation, but the plan is to add another ~20".
The trusses are spaced 16" on center.

The feed will come up the front wall to the first junction box.
I was hoping to have the conduit lay on top of the bottom cord, and screw a 2x4 on one side to protect it between the truss 16" spans.

The junction boxes will be screwed to the side of the main truss support up above the insulation.

I also wanted to avoid coming up from the truss cord to the next junction box then back down to the truss as I work my way toward the garage rear.

I had thought off using T conduit bodies that way I would only need to come up to the junction boxes once, but those conduit bodies would end up under the blown in insulation. There would be no splices in the conduit bodies.

Would it be acceptable in this case to use the conduit bodies with some sort of flag to identify their location under the insulation ?
Does any one have any better suggestion.

Is there any reason not to go higher on the trusses, and come down to the junction boxes with a conduit body ? Do I need to support the conduit bodies if there are partially out in the 16" span ?

Hers is a picture of my truss "bundles" when they were first delivered.

 

[maxpat82]

That's what I did in the 2house prior .
everytime I find a junction box, I put a "flag on it". wire, rope attach to the upper truss membre with a sticker naming the circuit or description.

I doubt there's something against putting the boxes or cable higher in the trusses then on the bottom of it.

 

[polizei1]

Mine is ran halfway up those 45* support legs, but the placement doesn't matter. I would NOT cover it with insulation though, it's just going to make it a PITA later. So that said, if you're doing 23" of insulation, make sure it's up higher than that. I believe mine are literally just taped on to the trusses in a few spots as well.

Unfortunately, I don't have a picture and it's already been covered up with insulation.

 

[Bert_]

Why not just put the boxes at the bottom of the truss like normal and bend 90's in the conduit? That way there are no junction boxes in the attic and all your wire pulling and splices can be done from the room rather than doing all that from the attic.

I don't like putting junction boxes in the attic unless absolutely necessary.

 

[bigb56]

Why not just put the boxes at the bottom of the truss like normal and bend 90's in the conduit? I don't like putting a bunch of junction boxes in the attic unless you really have to.

Yep that's the best and most professional way, 90 up into a 4 square then 90 down to the next one. Easier to pull also, T-bodys are a PITA.

 

[dscheidt]

Why not just put the boxes at the bottom of the truss like normal and bend 90's in the conduit? That way there are no junction boxes in the attic and all your wire pulling and splices can be done from the room rather than doing all that from the attic.

This is the correct way to do it. If you're worried about bending conduit, don't. it 's a skill, but 90s are easy, and no one is ever going to see this work, so you don't have to be perfect.