Ask Experts Questions for FREE Help !
Ask
    alabamaken's Avatar
    alabamaken Posts: 8, Reputation: 1
    New Member
     
    #1

    Mar 7, 2012, 10:19 AM
    I am running 100 -150 feet of underground wire for power to a outdoor building.
    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
    ballengerb1's Avatar
    ballengerb1 Posts: 27,378, Reputation: 2280
    Home Repair & Remodeling Expert
     
    #2

    Mar 7, 2012, 10:37 AM
    "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.
    alabamaken's Avatar
    alabamaken Posts: 8, Reputation: 1
    New Member
     
    #3

    Mar 7, 2012, 10:42 AM
    Possible use of a small welding machine and futer shop tools
    alabamaken's Avatar
    alabamaken Posts: 8, Reputation: 1
    New Member
     
    #4

    Mar 7, 2012, 10:44 AM
    Not sure about the code but I live in central Alabama near the tannihill state park
    alabamaken's Avatar
    alabamaken Posts: 8, Reputation: 1
    New Member
     
    #5

    Mar 7, 2012, 10:45 AM
    Forgot to mention this is going to be underground and I need to know what size conduit and what size wire?
    hfcarson's Avatar
    hfcarson Posts: 1,003, Reputation: 49
    Ultra Member
     
    #6

    Mar 7, 2012, 10:46 AM
    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
    hfcarson's Avatar
    hfcarson Posts: 1,003, Reputation: 49
    Ultra Member
     
    #7

    Mar 7, 2012, 10:51 AM
    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...
    tkrussell's Avatar
    tkrussell Posts: 9,659, Reputation: 725
    Uber Member
     
    #8

    Mar 7, 2012, 11:03 AM
    Hf, May I ask why the difference, if it is the backyard?


    Quote Originally Posted by hfcarson View Post
    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
    alabamaken's Avatar
    alabamaken Posts: 8, Reputation: 1
    New Member
     
    #9

    Mar 7, 2012, 11:04 AM
    It will be copper wire for sure and thank you for your help. So size of conduit?
    alabamaken's Avatar
    alabamaken Posts: 8, Reputation: 1
    New Member
     
    #10

    Mar 7, 2012, 11:06 AM
    60amps
    alabamaken's Avatar
    alabamaken Posts: 8, Reputation: 1
    New Member
     
    #11

    Mar 7, 2012, 11:11 AM
    60amps copper
    alabamaken's Avatar
    alabamaken Posts: 8, Reputation: 1
    New Member
     
    #12

    Mar 7, 2012, 11:24 AM
    Under ground wire for outoor building
    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.
    hfcarson's Avatar
    hfcarson Posts: 1,003, Reputation: 49
    Ultra Member
     
    #13

    Mar 7, 2012, 11:27 AM
    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)
    tkrussell's Avatar
    tkrussell Posts: 9,659, Reputation: 725
    Uber Member
     
    #14

    Mar 7, 2012, 01:58 PM
    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.
    tkrussell's Avatar
    tkrussell Posts: 9,659, Reputation: 725
    Uber Member
     
    #15

    Mar 7, 2012, 02:20 PM
    alabamaken, I merged your second question to the same thread as you started with, since it is related.

    Quote Originally Posted by alabamaken View Post
    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.
    hfcarson's Avatar
    hfcarson Posts: 1,003, Reputation: 49
    Ultra Member
     
    #16

    Mar 8, 2012, 05:09 AM
    TK,
    Thanks, I stand corrected...

Not your question? Ask your question View similar questions

 

Add your answer here.


Check out some similar questions!

What type aluminum wire should I use to run 150 feet direct bruial for 100 amp sub pa [ 3 Answers ]

What type aluminum wire should I use to run 150 feet direct bruial for a 100 sub panel.. Thnaks

What size wire for 220v 100 amp service at 100 feet [ 7 Answers ]

I am running 220v 100 ft to a 125 amp sub panel. A welder would be the heaviest thing used. (around 200 amp welder) what size copper wire would I need running in pvc underground

When running underground wire from one disconnect to another 100 feet away do I need [ 3 Answers ]

I am installing 400 amp service with two 200 amp disconnects and then running direct burial alum wire to another 200 amp disconnect 100 feet away due I need to run a ground wire in that underground wire bundle to connect to the two disconnects as long as I separate 200 amp disconnect ground and...

Dummy running underground cable for outdoor outlet. [ 2 Answers ]

Ok, I have a pavilion/gazebo, which is about 80 ft from my house. I apparently screwed up here... from what my friends are telling me at work. I ran BX-wire 14/2 cable directly underground (not in a conduit) down to the pavilon and hooked up an outdoor outlet. Everyone is NOW telling me...

Wire Size for 150 amp service 300 feet [ 1 Answers ]

I need to take electrical service 300 feet to my barn. I want to take a 150 amp service. What wiresize to I use for this effort.


View more questions Search