Panel feeders to a general care area not on essential electricial system ,PVC allowed??? I know for branch circuits part b applies approved grounding raceway AND insulated grounding condutor But feeders??? All I can find code references to are Branch circuits.
517.13(B) says the grounding conductor shall be installed in metal raceways or metal clad cables with the branch circuit conductors. This would imply only back to the panelboard. However,517.13(A) requires a ground path for fault current by a metal raceway system of cable armor assembly. A ground path for fault current must be continuous to the source of it's supply which in most cases is a transformer and would include the panel feeder.
Re: Hospital feeders wiring methods#88080 05/10/0407:05 AM05/10/0407:05 AM
517.19d Panelboard Grounding Which is a critical area ( I;m talking about is only General care area). Says grounded electrical system is used AND a Metal feeder or raceway OR type mc or mi cables IS installed:::::: So I;m taking it other wiring metods besides metal can be used . This was for Critical and I;m talking about General care. The IS installed again tells me I have other options. Again input is welcomed
Re: Hospital feeders wiring methods#88081 05/10/0408:52 AM05/10/0408:52 AM
I am trying to understand the reason for specifically requiring a redundant path with a metallic raceway from the panel to the devices but falling short of specifically requiring it for the feeder. The way I see it all the electrical redundancy is lost at the panelboard. Like I said above it requires a metallic ground fault path but it appears only from the panel to the device. Not the entire electrical path.