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exranger I get that for XHHW when you look at table 310.13. but for XHHW-2 it says 90C for wet applications which undergound conduit is... so where is the requirement to use 75C? it may well be in there somewhere I just don't see it.

question - if I use XHHW-2 isn't #2 good for 100A? unless I'm reading table 310.16 wrong?? (attached) this is the wire i'm looking at https://www.wireandcableyourway.com/2-awg-xhhw-2-aluminum-building-wire.html Also - does the neutral have to be a different color or have a stripe? it would be...

so i've never pulled large cables through underground conduit. is #1 al really that hard to pull? I'm a bit wary of getting half way through it and getting stuck. that's why I bought 2" conduit. I didn't buy wire yet so I have options. what insulation would you use for this? i know there's...

thanks. I'll probably go with 3-3-3-8 Cu for ease of pulling. the run is 125ft. I was thinking 100A for arc welder and future EV charger.

hmm well I know the burial depth is 18". I'm using 2" sch 40 PVC. I could swear I read something about a minimum entry height, or it could've been a minimum height that needed protection from physical damage?? in any case I'd rather not go too high because it would look odd. for wire I was...

how high above ground does a feeder entry to a detached garage need to be? assuming underground feeder and PVC LB. from the NEC it seems 18" but man that document is hard to read.

above the water line there's a ring of corrosion. the top has mutliple large cracks. the sides are almost corroded through (above water line). the back wall has a hole you can put your fist right through it. the baffle is gone. I did dig down and patch the hole at the back side with hydraulic...

ya know I asked about platic but the guy didn't want to do it. he claims they cause more problems (shifting around in the hole, distortion in shape, etc). I might push a little harder on the plastic option as I do think it would make more sense. This is the 2nd tank in a 2-tank set up. the first...

a bit off topic, but figure you folks know a thing or two about epoxy concrete coatings. I have to replace my 27yr old septic tank due to corrosion from the caustic sewer gasses. I'd like to get inside the new one and coat it with epoxy or polycuramine to help prevent corrosion going forward...

well it's really not that massively overbuilt... the 7x21 ridge is needed to keep the roof up, not to support the cantilever. the 7x18 parallam the architect spec'd was marginal. it would've had almost 3" of deflection under full snow load, which did pass code assuming no ceiling to crack in the...

here's the numbers from the calculations. under full 30psf snow load and simultaneous 8,000 lb load on the cantilever (a situation that will never exist) the ridge beam bears down on the hayloft header with 12,972lbs live load + 7,086lbs snow load. These loads translate to a 41,576ft-lb moment...

2-2x12?? not sure what you guys are seeing... the ridge beam bears on a 4ply 12" LVL over the hayloft opening. it easily carries the load. a 3 ply would've worked but I kicked it up a notch. the columns are 5ply 2x8s between the 7x21 beam and the 4ply LVL, and from the 4ply LVL to the...

the floor is 3.5x14 I-joists. 27ft clear span w/ 3/4 t&g dry ply. it's a little bouncy but it's primarily attic storage not living space, although it is code for 40psf live load.

so this is how I built it. entire back roof at 5/12 pitch. 12/12 front with dormers. 2x12 rafters notched to bear on top of the 7x21 x40ft structural ridge beam. the ridge beam cantilevers out 5ft on one gable end. it is designed to lift up to 8,000 lbs from the end of the cantilever. I...

thanks for the replies. good feedback. some more info. I already have a 100A sub panel in the house and it too is full. I did do a load calc and I'm nowhere near 200A. maybe 140 if everything in the house is on all at once. neverheless I have no free slots. FordTruck you said "Add a new main...

getting ready to run a 100A feeder to my detached garage. House main is 200A and is completely full, so I have to add some kind of disconnect/main lug panel outside to run the feeder to the garage. the run is 125ft. plan is 2" sch 80 pvc 18" deep with 3ga copper feeders. questions: 1) what type...

so the shed dormer on the back is making this more difficult. if I bear those shed dormer rafters on the ridge beam the tops won't align with the front rafters due to the difference in roof slope (nevermind the architect spec'd 2x8s on the dormer, which I don't understand. same rafter span as...

picture worth 1000 words...

wrenchguy... around here we call the joists rafter ties, and the upper ties "collar ties". I think you think I'm talking about collar ties when I say rafter ties. I'm referring to the connection at the top of the wall. in any case, I will have no connection at the top of the dormer wall which...

the garage is 27' deep. each rafter spans 13.5ft. the ridge is load bearing in this application as there will be a large section of shed dormer in the middle and the entire attic will be open with clear spans. hence effectively no rafter ties to hold the walls together... thus the need for a...