EMT mixed with PVC

[satox]

My NEC 2008 is not clear on this subject so I am putting this out to you electro-wizards here:

1. Can you connect emt to a PVC (weather proof) outdoor junction box?
2. Are strain reliefs required in the junction box (where the splices will be)?.

I could not find any PVC junction boxes that had strain reliefs . I eventually found a metal box but I'm still curious if there was a problem mixing metal with PVC. This junction box is replaces a rotting wood box that housed an ancient panel.

 

[Strife]

Really lost on the strain relief.
I guess you can connect the EMT to a pvc box with a female, but even with that I'm at a loss. Why not use a bell box? The problem with EMT to PVC, is the EMT effectively grounded?

My NEC 2008 is not clear on this subject so I am putting this out to you electro-wizards here:

1. Can you connect emt to a PVC (weather proof) outdoor junction box?
2. Are strain reliefs required in the junction box (where the splices will be)?.

I could not find any PVC junction boxes that had strain reliefs . I eventually found a metal box but I'm still curious if there was a problem mixing metal with PVC. This junction box is replaces a rotting wood box that housed an ancient panel.

 

[tkb]

You can connect EMT to a PVC box using a regular EMT connector or a raintite one if outside.
The only thing is that you will have to use a bonding bushing to connect to the EG.

 

[maghazadeh]

There used to be a restriction on this subject in NEC. No metalic conduit Shall enter into a non-metalic box smaller than 100 sq. inches.
I am not aware if that rule has been changed or not. next poster may educate me too.

 

[tkb]

The blue text is comentary from the 2011 NECH.

314.3 Nonmetallic Boxes

Nonmetallic boxes shall be permitted only with open wiring on insulators, concealed knob-and-tube wiring, cabled wiring methods with entirely nonmetallic sheaths, flexible cords, and nonmetallic raceways.

Exception No. 1: Where internal bonding means are provided between all entries, nonmetallic boxes shall be permitted to be used with metal raceways or metal-armored cables.

Exception No. 1 applies to nonmetallic boxes without threaded entries and permits the use of metal raceways and metal-armored cables with nonmetallic boxes. Internal bonding means must be installed to ensure ground continuity between the metal raceways or metal-armored cables. For the purposes of Exception No. 1, the term metal- armored cable includes cables with a metal covering such as mineral-insulated, metal-sheathed cable (Type MI), metal- clad cable (Type MC), and armored cable (Type AC).

Exception No. 2: Where integral bonding means with a provision for attaching an equipment bonding jumper inside the box are provided between all threaded entries in nonme- tallic boxes listed for the purpose, nonmetallic boxes shall be permitted to be used with metal raceways or metal- armored cables.

Exception No. 2 permits the use of metal raceways and metal-armored cables with listed nonmetallic boxes equipped with threaded entries. An integral bonding means is required to ensure ground continuity between the threaded entries. The requirement for means to attach a bonding jumper accommodates devices or equipment attached to the box. For the purposes of Exception No. 2, the term metal- armored cable includes cables with a metal covering such as mineral-insulated, metal-sheathed cable (Type MI), metal-clad cable (Type MC), and armored cable (Type AC).