Grounding a metal wireway with PVC feeders.

[Mezani]

Using 250.134 and 250.148, I have a 6' long metal wireway with 20 PVC 125A feeders used as a pull box with a #6 copper grounding conductor in each conduit. The question is, will connecting one of the #6 equipment grounding conductors be sufficient to ground the metal wireway or do all the ground wires need to be grounded to the wireway. These wires are not intended to be spliced within the wireway.

I look forward to your thoughts.

 

[jdero]

According to 250.132 & 250.134 (2008 nec) a single egc would suffice.

 

[raider1]

Provided that you connect the wireway to an equipment grounding conductor sized based on the largest overcurrent device protecting the conductors passing through the wireway you would be OK. You would not need to bond to all the EGC's.

Chris

 

[don_resqcapt19]

In my opinion, you need to bond an EGC from each raceway that contains conductors that may energize the raceway. 250.134(B)

 

[texie]

Assuming you have 10 "in" and 10 "out" in this setup, you would need to bond every EGC to the box. This is required so that a ground fault on, say circuit X will follow on the EGC associated with that circuit. Otherwise during a fault the current might have to travel on an EGC in another raceway which would be a violation of 300.3(B) or 300.5(I) (for under buildings).