Re: 517.19(c)
Craig, there is no requirement for this bonding jumper to be in conduit, in fact when flammable anesthesia was used, we would run an open #10 jumper inside the framing around the room to ground all exposed metal surfaces including; window frames, door frames, floor drains, any metal that might be secured into a metal stud, etc...
Note; this section as stated is Optional, and only if it is used would the jumper be necessary.
Roger