PVC to EMT and metal 4 sq box

[Jpflex]

I haven’t had to go from pvc to metal before so without knowing the proper material hookup for an underground 1’ pvc conduit 12 inches deep trench with 2” concrete to be covering leading to a reduction of a 3/4 EMT to a metal deep 4 square box with 3/4 knockouts for a 20 ampere receptacle circuit

My coworker suggested using a metal 1’ to 3/4’ reducing bushing inside of PVC female adapter at pvc 90 degree stub up bend end to 3/4 set screw EMT connector to EMT and again a 3/4 set screw connector at EMT end to metal box

Would this be a proper way to transition from pvc to emt, we did not have smaller pvc and I never had to go from pvc to metal before? Also a EGC will be ran inside of pvc to mitigate bonding

See picture below thanks

 

[jaggedben]

I don't see anything illegal about that.

It's not a terrible idea to use a 1" C condulet, with the PVC on one side and the reducing bushing on the other, so that your reduction in size isn't in the middle of your run where it'd be a pain if you struggle to get your fishtape through.

 

[winnie]

They are less common, but you can get 4 square boxes with 1" knockouts, or you can get them with no knockouts and use a punch.

No reason to neck down going from a 1" conduit to a 4" box.

Jon

 

[infinity]

Why do you need the EMT? Is there a reason why the PVC cannot go straight into the box?

 

[Ponchik]

What you are doing is fine. However, as suggested either use the 4s box with 1" KO, or a "C" conduit body, or enlarge the 3/4" KO to 1" and just continue with 1" EMT, or PVC40 or PVC80

 

[Little Bill]

I would use a step bit and enlarge the 3/4" KO to 1".

 

[Jpflex]

Why do you need the EMT? Is there a reason why the PVC cannot go straight into the box?

Need to be able to make an offset bend prior to going into box on side of table

 

[LarryFine]

Transition from the 1" PVC to 1" FNMC.

 

[Electromatic]

Why not use a heat gun and bend the PVC?

 

[Jpflex]

Why not use a heat gun and bend the PVC?

Very small section and company doesn’t have that equipment otherwise I personally only have a harbor freight heat gun for heat shrink

 

[Tulsa Electrician]

I haven’t had to go from pvc to metal before so without knowing the proper material hookup for an underground 1’ pvc conduit 12 inches deep trench with 2” concrete to be covering leading to a reduction of a 3/4 EMT to a metal deep 4 square box with 3/4 knockouts for a 20 ampere receptacle circuit

My coworker suggested using a metal 1’ to 3/4’ reducing bushing inside of PVC female adapter at pvc 90 degree stub up bend end to 3/4 set screw EMT connector to EMT and again a 3/4 set screw connector at EMT end to metal box

Would this be a proper way to transition from pvc to emt, we did not have smaller pvc and I never had to go from pvc to metal before? Also a EGC will be ran inside of pvc to mitigate bonding

See picture below thanks

Is this an outdoor location?

 

[Jpflex]

Is this an outdoor location?

No it’s indoors and we did not have 3/4 conduit so owner said to use 1” pvc just to hurry up installation

 

[Jpflex]

No it’s indoors and we did not have 3/4 conduit so owner said to use 1” pvc just to hurry up installation

No it’s indoors and we did not have 3/4 conduit so owner said to use 1” pvc just to hurry up installation

I wasn’t sure about rules regarding transitions from pvc to metal enclosures as I have not done this before. I only ran either all metal EMT or all pvc boxes and conduit before

 

[Tulsa Electrician]

If you do not want to set pull box down low then pipe up with 3/4.
Then I do not see an issue. I see it done all the time.