STRUT12034
Member
What is considered a 2 hour rated form of protecton for a fire pump feed that is being fed from a transformer outside of the building and then entering into a building and continuing 20' exposed, can this just be rigid conduit?
What is considered a 2 hour rated form of protecton for a fire pump feed that is being fed from a transformer outside of the building and then entering into a building and continuing 20' exposed, can this just be rigid conduit?
If these are conductors between the utility transformer and the fire pump controller, are these not considered service conductors? If they are, they are subject to NEC section 695.6(A)(1), which requires the conductors to be installed either outside the building or installed in accordance with 230.6(1) or (2). NEC section 230.6(1) requires the conductors under not less than 2 inches of concrete beneath a building while 230.6(2) requires the conductors to be encased in a minimum of 2 inches of concrete or brick.
There was a time when you could use 2 hour listed conductors but recently those conductors lost their listing.