Another feeder line question

[Awag]

I'm putting up a 30x48 garage/shop. I want to put a 100 amp service is it. I have a 200 amp panel in the house with plenty of load to share. It'll be around 75' panel to panel. I live out in the middle of nowhere. They don't do permits here but I want to do it correctly.
I've tried several online calculators. They show anywhere from 1 gauge to 3 gauge copper and 1/0 to 3 gauge aluminum. I'm ok with using either. I do like the idea of copper better but aluminum is cheaper.
To answer you're question yes I do need 100 amp. I probably should have bigger. For 220 loads I have a mig welder, 2hp mill, 1 hp lathe, 5hp compressor, maybe an oven someday, but the real kicker is my Lincoln idle arc 300 tig welder. It calls for a 80 amp breaker all on its own, not that I run it wide open all the time.
What type of wire and size would you recommend? It can be direct bury wire or run in conduit.
Looking at mobile home feeder it only comes in 2/0, 2/0, 1,4 a couple places do list it in 2/0, 2/0, 2/0, 4. If I go with 2/0 I think I should step up to 125 amp panel but then I need to look and see if I can even put a 125 breaker in my box. If w keep it 100 amp could I run the mobile home wire with the 1 Guage nutral or would I need 2/0? The reason I ask is 1 gauge aluminum should be big enough to meet code but it's smaller than the hot wires. I will have more load on 220 than I will ever on 110.
Sorry for the long rambling post I'm just having a hard time rapping my head around what I really need for my service wire.

 

[wyliesdiesels]

At 75’, #1 al will be fine for 100a.

If this is a one man shop, you wont be able to run multiple things at once.

 

[pattenp]

If you can install conduit panel to panel use conductors in sizes of #1 Al for the hots and neutral and #6 Al for the ground. The #6 will need to be green. I suggest using XHHW-2 AL type wire.

 

[u2slow]

Check your main panel label for the max subfeed breaker size. You might be able to do 125A to the shop for the same effort.

 

[Awag]

Thanks for the responses. I'll be at the house tomorrow and look on my box and see what the largest size breaker I can put in it. I thought 1/0 seemed kind of big for only 75'.

 

[Awag]

What kind of wire is this? Can I use this as my feeder wire?
https://www.wireandcableyourway.com...MIksLI6a6o6QIVQpJbCh1qgQtoEAQYASABEgIun_D_BwE

 

[wyliesdiesels]

What kind of wire is this? Can I use this as my feeder wire?
https://www.wireandcableyourway.com...MIksLI6a6o6QIVQpJbCh1qgQtoEAQYASABEgIun_D_BwE

That is URD and is not rated nor permitted to enter the structure.

instead use individual strands of 1/0 or MHF

But 1/0 is overkill for your situation

Why not use #1 AL?

https://www.wireandcableyourway.com/1-awg-xhhw-2-aluminum-building-wire.html

https://www.wireandcableyourway.com/1-awg-xlp-use-2-aluminum-building-wire.html

 

[Awag]

I was looking at the xhhw by the time I buy 3 #1 and a #6 it's 2.16 a foot plus I'll need conduit from house to shop. I can buy 2/0 mhf for 1.95 a foot. I know I'll still need conduit inside the buildings but not between. If my panel will allow it I'm thinking of using a 125 amp breaker in the house. Because of my welder that requires an 80 amp breaker. If I'm running it wide open(won't happen very often) plus the torch water cooler running and the compressor kicks on while all the lights are on, maybe a stereo playing, a fan running I'll be pushing 100 amps plus.

 

[wyliesdiesels]

I was looking at the xhhw by the time I buy 3 #1 and a #6 it's 2.16 a foot plus I'll need conduit from house to shop. I can buy 2/0 mhf for 1.95 a foot. I know I'll still need conduit inside the buildings but not between. If my panel will allow it I'm thinking of using a 125 amp breaker in the house. Because of my welder that requires an 80 amp breaker. If I'm running it wide open(won't happen very often) plus the torch water cooler running and the compressor kicks on while all the lights are on, maybe a stereo playing, a fan running I'll be pushing 100 amps plus.

what model welder do you have?

the 80a breaker is most likely for in-rush current NOT running current.

breakers hold for several seconds past their rating...

I doubt youll be over 100a...

 

[Awag]

It's an old Lincoln idealarc 300/300. It an old transformer machine that has a max output of 375 amps.

 

[Zeke]

It's an old Lincoln idealarc 300/300. It an old transformer machine that has a max output of 375 amps.

That's a beast. Don't most of those run on 480v? To use up to the rated capacity of that thing you'd be welding ships together.

 

[pattenp]

If you are pricing on Wire and Cable Your Way I'm getting $1.76 total a foot for the XHHW-2 Al. The #1 is $0.52ft and #6 is $0.20ft. But you do have to throw in shipping on top of that. Are you including shipping to get $2.16ft? The 2/0 MHF is $1.92 without shipping.

 

[Awag]

It is a 208, 240, 480 single phase machine. Like I said it would be very rare if ever I'd be running it wide open. Most of my welding would be done at 150 amps or less. I like this machine because if I need to get it done it has the power to do it, but I can turn it down to just one amp and weld on a pop can. Draw back is its the size of a small fridge and the weight of a small car.
I looked at my main panel in the house. If I'm reading it correctly it says "max sum of breaker ratings per stab; 200amp" I take it to mean that I should be able to put a 125 amp breaker in and run it out to the shop and shouldn't have to worry about running out of power. The house use to have electric range and water heater but that's all been changed to propane, and it's propane heat.

 

[Awag]

I think that 2.16 was including the price of the extra conduit I would need. I was looking at some many numbers last night. So it looks like it'll be pretty close to the same price to go either way. I'm leaning towards going bigger because you never can have to much power but some day you might need more. Most likely wouldn't need bigger but for simular price why chance it.