Shortcircuit
I see your point but on the other hand what would happen if the metal of the liquidtight were to be come part of the circuit and it was isolated. Fault current might attempt to seek the grounded conductor at the service point and there could be arcing at loose fittings (interconnecting metal enclosures for example). I would expect carbonization and poor conductivity. Possibly a lower current flow than that required to cause OCP to clear a fault.
A unabated current flow will obviously raise the potential to ground on all of the parts of the system , create heat, we could have an electrocution or cause combustion.
250.92(A) seems to me to take the guess work out of our hands. It's metal, it's part of the raceway system and it's on the line side of the service.
Charlie
[This message has been edited by cpal (edited 02-09-2005).]
