Bonding conduit sleeves
As shown in Figure 3, the requirement to install a conduit stub for telecommunication cabling may be a requirement by a local authority having jurisdiction or building specification by the system owner. The same requirement may exist for the sleeves shown in Figures 2 and 4. The NEC does not require these sleeves to be bonded and grounded. Because this exception appeared in only the three latest revisions of the code, legacy owner specifications and code officials may still require the sleeves to be bonded. In an application as shown in Figure 3, where the sleeve is part of a bonded system, bonding of the sleeve is required. If the sleeve in Figure 3 is not part of the bonded system, but is in close proximity of bonded and grounded surfaces, it would be prudent to bond the sleeves.
Good info on whether conduit sleeves need to be bonded/grounded or not.