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Originally Posted by Fuzz
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I can take a look later today but I believe for 100A it's a #2 awg 3 conductor. Why are you running a 100A service to the garage? Are you making that your service entrance from enmax for the whole property? If it's not you probably don't need that much power available there and a 60A should be fine. I can double check the code later on pipe sizing later, however the pdf you linked me doesn't want to work right now but I'm guessing that it says service entrance conduit or raceway. You only have 1 service entrance raceway in your home and that's where your panel ties into the utility, not for sub panels.
Edit: I got the pdf working and it's correct if you use NMWU #6/3, however you don't need to use that cable. You can use individual conductors inside the conduit which are rated for wet and underground use and reduce the size of the pipe required. The reason being is the NMWU cable has an outer sheath that increases the overall diameter of the conductors you're pulling through, requiring a larger pipe to pull them into. That's your call but when I did my garage, I used individual conductors in the pipe (proper ratings of course) and a 1" rigid PVC pipe. Inspector gave it a pass too.