More PVC Stuff

[Pierre C Belarge]

Here we see the PVC that is affected by the settling around the building. You can see the PVC has moved the distance of the width of the strap.

You can see it by the color of the PVC

The glue in the LB held on the vertical, but not the horizontal fitting.

 

[stickboy1375]

I see disconnects in your pics, but where is all this equipment?

 

[peter d]

I see disconnects in your pics, but where is all this equipment?

Obviously it's buried in the concrete. :roll:

 

[SiddMartin]

I see disconnects in your pics, but where is all this equipment?

prolly fed from the building to equipment outta site of the pic... I like the straps the guy put in the joint

 

[quogueelectric]

prolly fed from the building to equipment outta site of the pic... I like the straps the guy put in the joint

That guy didnt have a hilti gun just a cordless with a masonary bit.

 

[K8MHZ]

Are these pics taken from anywhere near the New Madrid fault?

 

[rexowner]

Pierre, these are really interesting pictures.

I have not seen a lot of conduit separated even though
I live in earthquake country, I guess because our
weather is relatively benign.

I am curious how old the buildings are? Would this happen
after one seasonal cycle?

It's not HPN I hope.

 

[wireman71]

Unless inspectors start enforcing expansion joints. EC's won't use them.

 

[Poolside]

I heard from a friend of mine the other day, that if there was an offset in the PVC, it would allow the pipe to expand and contract without the need for an expansion coupling. I could see where it would help with these installations where the pipe is straight coming out of the ground.

Has anyone else heard of this?

 

[tom baker]

Arlington makes PVC slip joint designed for this applications.

 

[LarryFine]

Arlington makes PVC slip joint designed for this applications.

So does Carlon; HD here has them. There's a pair of O-rings with a jellied lube on them. They have around 6" of travel.

 

[Rampage_Rick]

Just be sure that you think when you install them... If it's a blazing hot day, only pull them out 1". If it's cold, pull it out fully and push back an inch.

Install one almost fully-extended on a hot day and you'll be in for some fun when it cools off and the PVC shrinks.

 

[Pierre C Belarge]

Pierre, these are really interesting pictures.

I have not seen a lot of conduit separated even though
I live in earthquake country, I guess because our
weather is relatively benign.

I am curious how old the buildings are? Would this happen
after one seasonal cycle?

It's not HPN I hope.

The installation is several years old.

The one installation where it looks as though there was no glue applied to the PVC, that could occur within one season after the install as the earth settles from the construction process.

 

[jrannis]

We have some coastal areas that require the building to sit on pilings. Thats great for the house but, when the fill around the house settles, it pulls the service entrance conduit out of the meter and eventually pulls the conductors out of the lugs in the metercan.
Its good for service calls but for some reason it happens during nights, weekends and hoildays.

 

[smasch11]

Just be sure that you think when you install them... If it's a blazing hot day, only pull them out 1". If it's cold, pull it out fully and push back an inch.

Install one almost fully-extended on a hot day and you'll be in for some fun when it cools off and the PVC shrinks.

WE have to use them up here in the north east. They have a line on them where to extend to. We have to install them the other way though. frost makes the pipe rise in the winter so we extend them out most of the way and wait for the frost to push them back