Metal cable tray may be part of a bonding or grounding design, but the exact requirement depends on the project, tray material, electrical system and local code. Treat continuity as an engineering and inspection item, not an assumption.
Confirm the design intent
Check the approved drawings, electrical specifications and the tray manufacturer's instructions. Clarify whether the tray is intended to serve as a bonding path, whether a separate conductor is required and how continuity will be tested.
Inspect joints and splice plates
Use compatible splice hardware and install it correctly. Remove contamination or coatings only where the approved method requires it, and protect exposed areas after field modification. Expansion joints, flexible connections and dissimilar metals need special attention.
Coordinate covers, fittings and branches
Continuity should be considered across bends, tees, reducers, covers and branch routes. Keep the fittings schedule complete so installers know which bonding accessories and jumpers are required at each transition.
Record the handover checks
Document visual inspection, fastener checks and any continuity measurements required by the project. Testing must be completed by qualified personnel using the approved procedure and equipment.