[Michaelrj9]

I am running 120v 20a power out to a shed.
I am using RMC underground and up into the shed. I went through the concrete shed floor right into the wall.
The power is coming from the garage (separate circuit for shed)
In the garage I need to come down from the electrical box (outlet) in the wall about 8-12 inch then out the wall then down into the ground.

I was hoping to use fittings that I can pull wires though seamlessly but not sure if it is possible.
What options do I have for in wall fittings? with 3.5" of space.
Right outside the wall I was thinking of using a conduit body but not sure how to get from the outlet box that is supplying the power to the conduit body seamlessly.

Also what is code on RMC coming out of the ground. Does it have to be right next to the exterior wall or can it be 6"-12" away. If it can be away I can use 2 large 90's one in the wall and one outside. But it will not be right up against the house this way. The conduit will come up about 14" out of the ground before it goes into the exterior wall.

One more also The 3 piece compression couplings that Home Depot or Lowe's sell can those be used outside above the ground? If not any alternatives?

Thanks

 

[Arrow3030]

Is the box you're coming out of metal? Maybe you can get the rigid to go up to the same height as the box in the garage and use an LB and a nipple to get into the back of the box. Is the garage finished on the inside?

 

[Jim Port]

Rigid conduit uses threaded couplings , not 3 piece fittings.

 

[sparky48]

You could opt possibly using PVC inside and then transition to RMC once undergound. Come down from your box to the exit point, use back to back "LB" condulets continuing down the outside wall to a PVC female adapter. At that point screw on a RMC 90* elbow and continue to your shed. Using RMC you only need a 6" trench vs 18" with PVC. When you reach the shed the same application to get into the structure and to the box can be used. As far as the 3 piece couplings (I believe you mean compression couplings) can be used outdoors but not underground. There is such a thing as a 3 piece coupling called an erickson but you will need conduit threads on both adjoining ends of the conduit to use them.

If you don't have a threader you may want to just use PVC conduit. Usually working with RMC the joints don't always work out to where you don't need to cut pipe and thread it to put it together. Good luck and hope it all works out.

 

[Michaelrj9]

Is the box you're coming out of metal? Maybe you can get the rigid to go up to the same height as the box in the garage and use an LB and a nipple to get into the back of the box. Is the garage finished on the inside?

Yes the box in the garage will be metal. Right now it is plastic with Romex. But I will be changing it to metal. The garage is finished on the inside too.

Rigid conduit uses threaded couplings , not 3 piece fittings.

i am calling it a 3 piece but not like a Erickson fitting it is just a compression coupling (my bad)

Yes but if you cut the threads off then you can use compression fittings but wanted to know if that would be in code for outdoor use.
I can't post links but at Lowes it is Item #: 141846 | Model #: 49061

You could opt possibly using PVC inside and then transition to RMC once undergound. Come down from your box to the exit point, use back to back "LB" condulets continuing down the outside wall to a PVC female adapter. At that point screw on a RMC 90* elbow and continue to your shed. Using RMC you only need a 6" trench vs 18" with PVC. When you reach the shed the same application to get into the structure and to the box can be used. As far as the 3 piece couplings (I believe you mean compression couplings) can be used outdoors but not underground. There is such a thing as a 3 piece coupling called an erickson but you will need conduit threads on both adjoining ends of the conduit to use them.

If you don't have a threader you may want to just use PVC conduit. Usually working with RMC the joints don't always work out to where you don't need to cut pipe and thread it to put it together. Good luck and hope it all works out.

The RMC will be minimum 6" down.
I would rather of used a Erickson fitting but Lowe's or Home Depot do not have them. All they have is like the pic but don't say if it can be used outdoor.

So are you saying use one of the LB body's in the wall?

 

[Jim Port]

The LB needs to be accessible. It cannot be buried in the wall.

 

[Michaelrj9]

The LB needs to be accessible. It cannot be buried in the wall.

I knew that That's why I asked when sparky48 said to use 2 LB'S.


I just don't know how not to not have a tight 90 in the wall.

 

[sparky48]

Yes the box in the garage will be metal. Right now it is plastic with Romex. But I will be changing it to metal. The garage is finished on the inside too.


i am calling it a 3 piece but not like a Erickson fitting it is just a compression coupling (my bad)

Yes but if you cut the threads off then you can use compression fittings but wanted to know if that would be in code for outdoor use.
I can't post links but at Lowes it is Item #: 141846 | Model #: 49061





The RMC will be minimum 6" down.
I would rather of used a Erickson fitting but Lowe's or Home Depot do not have them. All they have is like the pic but don't say if it can be used outdoor.

So are you saying use one of the LB body's in the wall?

The coupling you are showing can be used outdoors BUT NOT underground. They are usually rated as concrete tight but you're not putting this application in concrete. What would possibly happen is with earth movement frost etc. the conduit could pull apart with those fittings. I don't think you want to dig deeper then 6" and I can't blame you but unless you have the threader you'd need for the pipe ends when you cut them I don't know what to tell you. I suppose you could rent a threader and don't forget to get some threading oil as well.