What size wire do I need for 100-150 feet for power to outdoor building. I want 220v at least 55amps to building. When I get into building I want 110 for swithces for lights and a couple of 110 outlets for drills and such

"110 for swithces for lights and a couple of 110 outlets for drills and such
" so I am confused, why the 220v @55 amps if you just have lights and receptacles? What else is going in the out building? Which code are you required to follow, likely need a driven ground for this building.

Possible use of a small welding machine and futer shop tools

Not sure about the code but I live in central Alabama near the tannihill state park

Forgot to mention this is going to be underground and I need to know what size conduit and what size wire?

Sounds like a 100 ampere, 240V, sub service...
#2 AWG copper + #8 copper ground or
#1/0 aluminum + #6 aluminum ground

If this is in your backyard...
#4 copper + #8 copper ground or
#2 aluminum + #6 aluminum ground

For conduit size first decide copper or aluminum...
And what amperage, 60 amps or 100 amps...

Then as ballengerb1 eluded to there are other requirements that must be met
When installing a sub-service in a separate building...

The State of Alabama is under the 2011 National Electrical Code...

Hf, May I ask why the difference, if it is the backyard?

Quote:

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Originally Posted by hfcarson

Sounds like a 100 ampere, 240V, sub service....
#2 AWG copper + #8 copper ground or
#1/0 aluminum + #6 aluminum ground

If this is in your backyard...
#4 copper + #8 copper ground or
#2 aluminum + #6 aluminum ground

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It will be copper wire for sure and thank you for your help. So size of conduit?

60amps

60amps copper

Now I am going to use copper wire and 60 amps for this project , going to have a future welding machine and other carpentry equipment and a couple of 110volt outlets and a light with switch with two 110 light fixtures what size wire and what size conduit and can I use pvc conduit for this job.

First, TKrussel table 310(B)(6) allows "Single Phase Dwelling Services and Feeders" to be smaller
Than those listed in table 310.16...

alabamaken,
60 ampere copper feeder to a sub-panel would be:
(3)-#6 AWG THWN copper + #10 copper ground
In at least 1" PVC conduit. You can go as large as you want
it will make the pull easier!

You still need to put in a grounding electrode at the sub-panel,
you need to keep the neutral isolated from the ground and connect a
ground rod to the ground of the panel with #8 bare copper.

Any questions at all write back to us
(Are you getting a "permit"? I recommend it)

Hf, I contend that Table 310.15 B 6 is only for the service entrance conductors.

See the actual text from NEC 2008, Section 310.15 B 6, (Maine has not adopted 2011 yet):

(6) 120/240-Volt, 3-Wire, Single-Phase Dwelling Services and Feeders. For individual dwelling units of onefamily, two-family, and multifamily dwellings, conductors, as listed in Table 310.15(B)(6), shall be permitted as 120/240-volt, 3-wire, single-phase service-entrance conductors,
Service-lateral conductors, and feeder conductors that serve as the main power feeder to each dwelling unit and are installed in raceway or cable with or without an equipment grounding conductor. For application of this section, the main power feeder shall be the feeder between the main disconnect and the panelboard that supplies, either by branch circuits or by feeders, or both, all loads that are part or associated with the dwelling unit.

I draw your attention to the bold text.

Table 310.15 B6 does not apply to a feeder from the main service panel to an outbuilding, must use Table 310.16.

alabamaken, I merged your second question to the same thread as you started with, since it is related.

Quote:

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Originally Posted by alabamaken

Now I am going to use copper wire and 60 amps for this project , going to have a future welding machine and other carpentry equipment and a couple of 110volt outlets and a light with switch with two 110 light fixtures what size wire and what size conduit and can I use pvc conduit for this job.

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TK,
Thanks, I stand corrected...