Power to garage

[fourspeed61]

Planning to run power to my new 18x26 metal garage and thought I would post a sketch here to get opinions, recommendations or if what I have is sufficient. With the help of a worker in Home Depot's electrical dept we came up with this.
I plan on doing the grunt work (running the wire, digging the trench, etc) and leave it up to a licensed electrician to make the final connections. I have not yet purchased any wire or breakers. Appreciate any inputs you may have....thank you.

 

[19Vert64]

Planning to run power to my new 18x26 metal garage and thought I would post a sketch here to get opinions, recommendations or if what I have is sufficient. With the help of a worker in Home Depot's electrical dept we came up with this.

I plan on doing the grunt work (running the wire, digging the trench, etc) and leave it up to a licensed electrician to make the final connections. I have not yet purchased any wire or breakers. Appreciate any inputs you may have....thank you.

Probably get more replies in lighting and electrical rather than here in heating and a/c


Sent from my iPhone using Tapatalk

 

[theoldwizard1]

The first thing you need to do is make a list of the loads you are going to have in the garage. If you are a one man operation, 60A service is usually adequate, buy you won't know unless you write it down.

Second thing you need to know is how far is it from breaker to breaker.

Finally, this is what you need to know

View media item 33304

2-2-2-4 MHF would be cheaper, but it must be inside of a conduit when it is inside of a building.

 

[matt_i]

Just to be sure the 6-3 UF wire must have a ground inside it, so 6-3 WG = "with ground". The other conductors should be black, red, white, ideally.

ALso getting from the attic to the underground trench might require a piece of conduit depending on how you do this, for protection.

Also note in the diagram above it calls out 2 driven rods for the detached out building.

 

[fourspeed61]

Thank you TheOldWizard, great reference chart.

 

[fourspeed61]

Thanks Matt, yes the wire has red, black, white and CU for ground. I was planning on placing wire thru conduit along outside of house wall but not thru attic or underground. Guess I had better check a few more codes.

 

[fourspeed61]

Your right, guess my finger hit the wrong button. I met to put this in the electrical section...by bad.

 

[fourspeed61]

Planning to run power to my new 18x26 metal garage and thought I would post a sketch here to get opinions, recommendations or if what I have is sufficient. With the help of a worker in Home Depot's electrical dept we came up with this.
I plan on doing the grunt work (running the wire, digging the trench, etc) and leave it up to a licensed electrician to make the final connections. I have not yet purchased any wire or breakers. Appreciate any inputs you may have....thank you. The #6/3UF wire is 4 conductor (red,white,black,ground).

 

[wyliesdiesels]

#2 al MHF will save u about 60% compared to the cost of 6/3 uf-b and will allow for more amperage.

 

[theoldwizard1]

#2 AL MHF will save u about 60% compared to the cost of 6/3 UF-B and will allow for more amperage.

I was planning on placing wire thru conduit along outside of house wall but not thru attic or underground.

If you are planning on using MHF, it must be in a conduit when it is above ground (many would recommend conduit even below ground but code does not require it). It is more digging, but it might be easier to run the MHF underground around the house and come in close to the existing panel.

Rigid plastic conduit is pretty cheap and easy to cut. Where your conduit comes out of the ground, if it any where near where someone might use a string trimmer, use metal conduit or Schedule 80 plastic.

 

[fourspeed61]

I would use MHF but my problem is the concrete driveway is right up against the house so the attic was my only choice.

 

[pattenp]

You could use #2 Al SER from inside down side of house to a junction box and switch to #2 MHF to the garage. The SER is basically installed the same as NM. It may need to be sleeved in conduit where coming down the outside wall for protection. Provided you don't mind a big junction box stuck on the side of the house.