To give you a little background of our company, we are a Material Handling company.
We build, fabricate, engineer, install and service overhead cranes.
My question to you is:
I have tried to find in the NEC what the limits are on multiple conductor Flexible cords/cable like SO cord is. We have been told that it is acceptable to run SO type cable down along our bridge girder with out it being protected in some way. What is happening here is that we come out of our Bridge Control panel (which is our motor control center) and go down along the bridge girder to the end truck motors. This run maybe at time any where from 15 feet to 65 feet long. We normally run these conductors in EMT conduit mostly but do have a few customer who like ridge. Is there something in the NEC that states it’s ok to run SO type cable like this? Or maybe something that will state that these conductors need to be protected in a raceway.
Thanks
Gene B. Shults
Electrical Designer
