The OP photo was a standard requirement for the Water Service here. Not sure if it still is. On sites we inspected, controls for pumps were often secured to steel stanchions and whether inside or out, the incoming swa sheath was bonded to the stanchion. I am not sure why, it may have been a leftover from the days when anything metallic within range was bonded or perhaps it was just a carry on from specifications for their areas where explosion risk was present. We often found the SWA glands to be corroded but not sure whether that was due to the harsh environment or the link to the stanchion. 

Setting aside the need to provide main bonding to the stanchion, the tray appears to be neither an exposed or extraneous part. 

As a matter of interest the note to Reg 411.4.2 in IS 10101 (Regs in ROI) recommends taking every opportunity to connect protective conductors to elements that provide effective earthing. I guess the OP photo may get a tick for that!

The OP photo was a standard requirement for the Water Service here. Not sure if it still is. On sites we inspected, controls for pumps were often secured to steel stanchions and whether inside or out, the incoming swa sheath was bonded to the stanchion. I am not sure why, it may have been a leftover from the days when anything metallic within range was bonded or perhaps it was just a carry on from specifications for their areas where explosion risk was present. We often found the SWA glands to be corroded but not sure whether that was due to the harsh environment or the link to the stanchion. 

Setting aside the need to provide main bonding to the stanchion, the tray appears to be neither an exposed or extraneous part. 

As a matter of interest the note to Reg 411.4.2 in IS 10101 (Regs in ROI) recommends taking every opportunity to connect protective conductors to elements that provide effective earthing. I guess the OP photo may get a tick for that!