I am replacing a recessed can light with a new ceiling fan/light. The old housing is a 6" HALO 7HT like this: 
Inside the metal box there are 2 bare copper ground wires connected. Inside the conduit there are only the white and black wires. The fan assembly has 2 green ground wires and installation guide says "Connect the ground conductor of the 120V supply (this may be a bare wire or a wire with green colored insulation) to the green ground lead(s) of the fan. When using standard ceiling mounting, there are two green grounding leads; one from the mounting bracket and one from the hanger ball/downrod assembly"
My problem is that the 2 green ground wires from the fan assembly cannot reach the 120V ground connector inside the metal box. The conduit does not contain a ground wire. Am I supposed to fish one through the conduit and attach at each end? Is the conduit itself grounded? Bottom line: how do I safely and properly attach the 2 green grounding wires of the fan assembly using the conduit and metal box that are in the ceiling?
So I believe what I am reading is that if I connect the conduit to the box with the connector (black), I can then hook the 2 green ground wires from the new fan / light to the grounding screw in my new box (blue-green in the above pic, not yet screwed into the box in the below pic).
1- correct?
2- the connector is plastic….do I need a metal one?
Best Answer
The FMT coming from the box should be grounded. You need to check this with a volt meter. Connect the FMT to a metal fan rated box with the appropriate connector. Then, with the power on, check the voltage from the fan rated box to the black wire from the FMT, you should get 120V+- if the box is grounded through the FMT. Turn power back off. Then take the two ground wires from the fan/bracket and attach them to the fan rated box. Connect the black and white from the FMT/box to the fan. Attach the fan to the box and you should be good to go.