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Subpanel i want to run a 40 amp subpanel to a barn 430 feet away. can you give me a step by step?

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  • bealls4 Oct 24, 2008

    The panel will be used for lighting and duplex receptacles. I will be running triplex from pole to pole. Do i have to use a double pole breaker in the main if the subpanel is a main lug panel w/o main disconnect?

  • butch welch May 11, 2010

    My friends (electricians) and I had fun with you problem. We use electrician calculator, the ugly book and the code book to solve this. I guess we need to know what size wire you are planning to run. Yes you will need a double pole breaker at the main and a new ground rod at the barn.

  • butch welch May 11, 2010

    What will you be using this panel for. Are you running the wires above or below ground.

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YOU WILL NEED A 2 POLE @ THE HOME PANEL AND ANOTHER @ THE BARN PLUG THE ONE @ THE HOUSE AS YOU NORMALLY. WOULD PLUG THE ONE @ THE BARN ONTO THE BUSS IN THE MLO PANEL AS IF IT WERE TO BE A FEEDER BUT INSTEAD PUT THE 2 PHASE WIRES ON IT , THIS WAY YOU WILL HAVE A MEANS OF DIS-CONNECT AT THE BARN AS WELL, YOU WILL STILL NEED A GROUND ROD @ THE BARN TO GND THE MLO PANEL AND ALL RECPT SHOULD BE GFCI RATED FOR SAFETY AS FAR AS THE WIRE SIZE DONT KNOW LOAD , BUT A GUESS WOULD BE A # 4 COPPER TRI OR A # 2 ALUM SHOULD HANDLE WHAT YOUR GOING TO DO , JUST A GUESS .

Posted on Nov 23, 2008

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1 Answer

Electical panel


1) Add a subpanel using extra breaker space:
http://waterheatertimer.org/How-to-install-a-subpanel.html

2) Choose correct wire and breaker.
Increase to next larger size for distances over 100 feet from breaker.
http://waterheatertimer.org/Color-codewire.html

3) Calculate total load on main breaker to make sure service panel is large enough for amp draw:
http://waterheatertimer.org/Troubleshoot-household-electricity.html#stress

4) Add a comment

Feb 11, 2013 | Circuit Breakers & Wiring Panels

1 Answer

What gauge wire do I need to put a sqr d 100 amp subpanel 33 feet away? ... is # 6-3 too small?


According to my sources you need to use size #1 AWG copper wire for a 100 Amp circuit. #6 wire can only handle 55 amps.

Jan 04, 2012 | Siemens 100 Amp Main Breaker Renovation...

1 Answer

I have a 125 FPE box currently the combined total of all breakers presently in the box is 190 amps. I am wanting to replace a single pole 20 with a single pole 40. Am I already maxed out or do I have room...


You can add the breaker.
The key is total electric use.
As long as total consumption does not exceed amps shown on main breaker, then the new 40A breaker installation is ok.
If total consumption exceeds main breaker, then the main breaker will start to get hot and then trip.
http://waterheatertimer.org/How-to-install-a-subpanel.html

Put hand on main breaker and feel for warmth.
The main should not feel warm.
Consider upgrading to 150A or 200A service.

Aug 22, 2011 | Connecticut Electric UBIF040N FPE...

1 Answer

40 amp gfi on hot tub keeps tripping.I have a 50 amp.can I use?


Your hot tub needs GFI protection because it is electrical, and people sit inside water that could be exposed to electric current.
You have a fault to ground that needs to be fixed.

Size 8 wire for 50Amp breaker.
Size 6 if tub is 50-100' feet away
http://waterheatertimer.org/Color-codewire.html

Nov 09, 2010 | Spa Parts Plus GFCI, Circuit Breaker, 40...

2 Answers

How do I run from a 100 amp main panel to a 60 amp subpanel, 125 from my house to the garage


See 60 Amp sub-panel image

Above image shows drawing of 60Amp sub-panel located next to main panel. Drawing shows #6 wire... 125' distance to garage calls for #4 wire. I ran #4 to my barn and have no problems.

Give thought to how many new breakers you want at garage.
See photo of subpanel that holds three 240V breakers

Using drawing as a guide. Replace existing 240Volt breaker with new 60 Amp breaker. Two hot wires connect to new 60 Amp breaker. Neutral connects to neutral busbar.

More space: You can free up space in main breaker box using a tandem breaker. Or by doubling up 2 lightly used 120V circuits onto one breaker. Do not double-up on 240 Breakers

Conduit: You want PVC conduit large enough to fit three #4 wires. Bigger conduit is easier to pull wires ... and maybe later ethernet wire, or alarm wire etc.

Ground wire: You can put a ground rod at garage and run #6 bare copper between sub-panel neutral-busbar and ground rod. Attach ground wire firmly with grounding clamp.

I want you to check with local electrical supply for exact code in your area concerning conduit requirements, grounding, and wire size. Tighten all lugs very tight against wire.

Oct 03, 2010 | Siemens 100 Amp Main Breaker Renovation...

1 Answer

Pole barn subpanel has suddenly dropped half of circuits


Problem solved. I disconnected both ends of the feeder line to the barn and tested continuity by alternately hooking two wires together at a time and using an ohm meter on the other ends. The result of the testing was that the majority of the wires in the run were making contact with each other to varying degrees. We have seen a lot of rain this spring, so I assumed there was a break in the line that had gotten wet down in the ground. We had some work done last fall where they may have distrubed the line, so I dug around that area first and luckily found a splice that had been very poorly sealed against the elements. Got it dried out and everything returned to normal. I used layers of liquid electrical tape and heavy water proof tape to insulate and seal the repaired line prior to putting it back into its wet environment and back filling.

May 13, 2009 | Circuit Breakers & Wiring Panels

1 Answer

Subpanel


the only way unless the existing wiring is long enough or can be re-routed to the new sub is to use junction boxes with covers and wire nut to connect the wires ( make sure that the wire is the same as the wire you are connecting to and install breakers to accommodate the amperage rating of the wire examples are # 12-20 amp, #14-15 amps , # 10-30 amps # 6 50 amps do not put any 220 volt and 120 volt in the same junction box and no low voltage wire in with 120 or 220 volt wires , if you will need to splice the range wire or any wire larger than #10 i would recommend replacing with new wire if this is not possible then use only connectors approved for the wire to be used .good wiring !

Dec 17, 2008 | Pacific International Federal Pacific...

1 Answer

Subpanel wiring


You need to run the appropriate size wire from the main panel to the new sub panel. I would recommend getting a electrical contractor to do this for you.

Dec 16, 2008 | Pacific International Federal Pacific...

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