Adding A Sub Panel

Hi everyone, this is my first post.  Hope it works out!



I have a new detached two car garage with two 115v 15A circuits in it.  I want to put in a 12000 BTU window air conditioner.  One circuit runs 10 fluoresent bulbs in the garage and a few in the house but also runs a few outlets in the house that see occasional use by a 12A vacuum cleaner.  The other is solely used for the door opener and outlets in the garage where I often use a 12 amp skill saw. 



Both circuits are aqccessible, which one should I choose?



Puttster
      

Greetings,



I am looking to wire a sub-panel in my barn to support a general workshop.  Loads would include standard woodworking tools (including 220V table saw), welding, air compressor, etc.



The house has 200AMP main breaker and minimal in-house loads.  Dryer is gas, Oven and cooktop are gas.  Water heater is off the oil furnace.  I think the biggest single load is the well-pump and/or fridge compressor.  We do have sporadic toaster oven, hairdryers etc.  Otherwise its just lights, ceiling fans, flat-panel tv, stereo...



We had 4" conduit installed to the barn, so there is plenty of room to pull a big cable.  The entire run from the house panel to the barn totals around 155' (probably less, but rounding up)



My questions a



Can I pull a 100AMP sub-panel from my main house panel as described?


Would 4/0,4/0,4/0,2/0 aluminum service entrance cable be a good choice for this run?  Could I do it with something lighter?


Could I put an additional sub-panel in the garage (about halfway to the barn) by interrupting the run?  The garage subpanel would have a 220V plug for possible welding and/or electric car charging.  Would this require a separate run?


Are there any other considerations I should be thinking about in planning this?




Thanks for any thoughts you can share on this! 



Cheers,



pete
      

I want to set up a hobby woodworking shop in my garage. I was going to run from the panel maybe four or five 12/2's to accommodate lighting, power tools, dust collection, etc. or should I put a subpanel 60 to 100 amp? The main panel is on an outside wall on one side of the house and the garage is on the opposite side of the house. The distance from the panel to the entry into the garage is about 50 ft. I would be pulling wire- a straight run- through a ceiling chase that runs the length of the house. No basement.
      

I'm getting ready to dig a trench to run electricity from my house to my garage.  Along with an electrical line, I would also like to run a line for my air compressor.  I would like to keep my compressor in my basement and have a line for it in the garage.  Does anyone have any tips for how to properly bury an air compressor hose?  I searched on Google a bit, but couldn't really find exactly what I was looking for.  Thanks.



Jesse
      

I built a free standing garage with main power tapped from the home breaker box.  The contractor pulled 4 wires via a conduit to the freestanding garage panel which supplies lights, a garage door, and two 20 amp outlets.



Everything worked well initially, but about 1 week ago one section of the lights in the building went out.  The contractor came out and found that one of the two hot wires in the garage panel was only seeing 100 volts and that went down if anything else was turned on.  He swapped one of the ground wires for the bad hot wire and everything now works. 



What would cause a situation like this where the hot wire apparently had a voltage loss?  Is it safe to continue with the fix where the faulty wire is now the ground?



Thanks in advance!
      

I posted this in the woodworking forum and I got a ton of rants so please spare me that please. I'm not an idiot and I intend on completely turning off all power before attempting anything.



So I've been researching adding a couple of electrical outlets to my garage (where the panel is). I want to run a new 120v outlet for the tablesaw (older craftsman 113 series) so that it is on it's own circuit and a 240v outlet for a grizzly G1029z2 DC on it's own circuit as well.



What amp 120 circuit should I add for my tablesaw? Will a standard 15a breaker be fine?



What amp 240 circuit should I add for my DC? The motor plate states 12 amps and the manual says the electrical is a minimum circuit size of 20. Should I just install a 20amp circuit or go with larger circuit?



Need recommendations on the gauge of wire to use on each circuit.
      

Hi All -



I'm looking to add some outlets in the garage (currently have only one) for my workshop. At most, I'll be using a 13 amp table saw and 11 amp shop vac simultaneously.



I had an electrician come out for an estimate and while it was a fair price, I want to do this myself to build some confidence.



A few questions: he said they would probably add 2 15 amp circuits to handle the load. Is that necessary? Or can I add say one 30 amp circuit?



2nd: my garage is drywalled (and insulated). It will be much easier to have the outlets (and wire) on the exterior of the wall. What would be the best materials for this? My breaker is located in the garage and the outlets would run directly out from the side as seen in my poor illustration.



Since it is set into the wall, I'll have to run the wire from the breaker into the back of the first box. Is that as simple as it sounds, or is there something that I am missing?



Any help is appreciated.



Cameron
      

Does standard drywall have 15 min. finish rating or is this identified as the "fire resistant" drywall.  And does a detached residential garage even require a 15 min. finish when nm is used?  I have read and read and it seems as though exposed nm is acceptable in an attached garage but not in a detached garage???  I still can't seem to wrap my head around the logic of some of the NEC codes....
      

Garage running Underground feeder 4/4/4 AL from main panel off dual 80 amp breaker.

Yesterday I found half the garage panel was inoperative.

Tested lugs, one of the feeders is 120V, the other is at 80-90V.

Swapped the feeders at the 80 amp main to ensure it wasn't the breaker. Same results.

Tested at the 80 amp breaker at main panel, both legs 120V.

When I remove the 80-90V feeder off the 80 amp main panel breaker and test it at the garage it drops from 80-90 to 0.



No breakers trip. Is this one feeder line broken underground or split open and grounded to earth?
      

I'm preparing for finally calling in for my rough in inspection and was hoping I could get a checklist or at least some suggestions as to what work should and should not be completed for a rough-in inspection.  Does any wiring need to be spliced, wire-nutted, terminated within the panel or lighting or receptacle boxes?  My project was running power from main panel to lug and from lug to sub in detached res. garage and installing 4-5 lighting and recep circuits.