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jpmaddog
Wiring shed with 10-3 wire

Hi, I have 80 feet of 10-3 underground wire and would like need a light and an outlet in my shed that is 40 feet from my 200amp box. What is the simplest way to do this? (My level of experience is that I've run wiring for my Washer, Dryer, stove, microwave and bathroom.) Code wants me to buy a $15 permit and burry the cable 18" deep or 12" deep in conduit.

What breaker do I use in my box?
Must I have a subpanel box in the shed?

mike_g
Re: Wiring shed with 10-3 wire

sleeve it in pvc, then use a 2p 30a breaker to feed a sub panel (4 or 8 ckt)

jpmaddog
Re: Wiring shed with 10-3 wire

Do I need to put a grounding rod into the ground at the shed?

mike_g
Re: Wiring shed with 10-3 wire

no, if you are using 10/3 you have 2 hot's a neutral, and a ground. You are grounding this panel via the main panel

Re: Wiring shed with 10-3 wire

Yes, you will need a ground rod (I assume its detached from the house). Yes, you will need a sub panel. Also, if your running a dryer and washer you will need more than a 30A circuit. I would consider at least a 60A circuit especially at 80+ feet.

sparky1
Re: Wiring shed with 10-3 wire

i believe the code states you dont need a sub panel if your only running two circuits, which you have, if you dont want to spring for one. also no ground rod if you keep it this way.

canuk
Re: Wiring shed with 10-3 wire

Sounds like paying the $15 when you get your permit would answer all your questions.

canuk
Re: Wiring shed with 10-3 wire
deadshort wrote:

Sounds to me like paying for a permit and asking the AHJ would answer most of the questions on this forum.

as far as requirements ----- yep
Still leaves lots of room for for questions as for how to.

kendall.luther
Re: Wiring shed with 10-3 wire

If your a lecky you'd know the answer,if your not then I would recommend you leave well alone,as there are many factors to take into consideration.

jpmaddog
Re: Wiring shed with 10-3 wire

I called the permit guy and here's what he said:

I need:
A sub panel box with a main shutoff switch
A 8' grounding rod at the shed
To keep neutral and ground separate
A 12" trench (which he must see)(and he recommends conduit)
GFI protected outlets

Now I have 3 questions:

1. If I run the wire out the block wall to the outside, it will have to travel 4' down the outside wall to the ground. Does the UF cable need to be inside conduit and what keeps the top waterproof.

2. The 10-3 UF wire is about 3/4 wide, should I use 1" conduit or would 1 1/2" or even 2" be better? (the trench will only be 40' long and it costs between $1 and $2.50 per 10 feet depending on size.)

3. what does he mean by keeping the neutral and ground separate?

bp21901
Re: Wiring shed with 10-3 wire
jpmaddog wrote:

I called the permit guy and here's what he said:

I need:
A sub panel box with a main shutoff switch
A 8' grounding rod at the shed
To keep neutral and ground separate
A 12" trench (which he must see)(and he recommends conduit)
GFI protected outlets

Now I have 3 questions:

1. If I run the wire out the block wall to the outside, it will have to travel 4' down the outside wall to the ground. Does the UF cable need to be inside conduit and what keeps the top waterproof.

2. The 10-3 UF wire is about 3/4 wide, should I use 1" conduit or would 1 1/2" or even 2" be better? (the trench will only be 40' long and it costs between $1 and $2.50 per 10 feet depending on size.)

3. what does he mean by keeping the neutral and ground separate?

1. It should be in conduit when it exits the house and down the wall then the top will be watertight. Caulk around where the conduit comes through the house.

2. I would use 1-1/2".

3. In the subpanel in the outbuilding you will have a terminal bar that is used for the neutrals and a separate terminal bar that is used for the ground wires. This is different than what you probably have in your house panel where the neutral and grounds share space on the terminal bar in your circuit breaker panel. The sub panel neutral terminal bar will be connected to the neutral wire that is running back to the house panel. The sub panel ground wire terminal bar will have a bare copper wire that runs to your ground rod. I do not believe you want a ground wire between the house and outbuilding since you have the ground rod, but I am sure someone will confirm or correct this.

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