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I now have to run another 2x 30a circuits, which are general purpose circuits for lathe, mill and other, with other future 240v tools. Both circuits would be in same conduit. Can I use a single ground wire for both ?

Love the 1 in SS top !!

Thanks you all for responses. 10g will be used. John

Bert, yes of course max amp draw would not exceed 15a, but isn't this normal to rate full 30a on a 30a circuit ? I mean it's not a welder.

170ft from panel, 30a breaker, 2hp lift motor. Using a voltage drop iPhone app, 150ft was max distance for 10g wire.

Thank you.

That I know, just prefer to use a separate ground.

My concrete guy installed VB under the foam. PEX was stapled to foam, then wire mesh.

I'm planning to run 3/4 emt to my planned lift location which is about 170 ft from panel. Using 8g thhn for run , but is 10g sufficient for ground, or need to keep ground at same 8g ? Thanks

you did well.

I put an apron on the outside perimeter of my garage, 2 feet of 2in XPS all around except 4 feet x 8ft wide on each side of corners. It helps to keep frost from going under the slab.

I bought my whole system from Blueridge. Good advice and selection.

I use 7/8" size for 3/4 copper and small lengths of Unistrut,. http://www.blueridgecompany.com/radiant/hydronic/509/hydra-zorb-cushion-clamps

Blueridge offers this design service free if you buy the oxygen barrier pex from them. They also rent you the stapler.

I got 5000k for my shop, and not too blue.

Blue Ridge is a very good supplier. Got all my stuff from them, very happy.

Poly will help not only as vapour barrier but also reduce air infiltration. Do put it up.

I have 2 feet overhangs and no damage from snow piling. The piling occurs 2-3 feet from the sidewall.

I did #1 in my shop , worked out great. Then heavy wire mesh over pex.

The design and time taken to think about every single detail no doubt make it a great garage to work in. Video is really nice too...