Section,Item,Vendor 1,Vendor 2,Vendor 3,Buyer Check,Red Flag
Basic Requirement,Crane capacity and quantity,,,,Confirm all cranes sharing the bay are listed,Vendor assumes only one crane current
Basic Requirement,Runway length / DSL length,,,,Use actual bay travel length in meters,Length missing or rounded down
Basic Requirement,Feed arrangement,,,,End feed / center feed / dual end feed / multiple feed points,Vendor says standard without layout
Electrical Rating,Current per crane,,,,Ask for current of each crane not only total connected load,One average current used for different cranes
Electrical Rating,Simultaneity factor,,,,Confirm how many cranes can run together at peak load,No basis for diversity factor
Electrical Rating,Busbar current rating,,,,Compare design current against offered busbar rating,Rating lower than design current
Electrical Rating,Voltage drop calculation,,,,Ask vendor to submit calculation with conductor data,Voltage drop not checked
Electrical Rating,Conductor material,,,,Copper / aluminium / galvanized steel conductor details,Material not declared
Busbar Supply,Busbar make and model,,,,Record brand and exact series offered,Only generic busbar mentioned
Busbar Supply,Number of poles / conductors,,,,Check phase neutral earth control requirement,Poles not matching application
Busbar Supply,Insulating housing / shrouding,,,,Check finger-safe shrouded construction,Open conductor offered for normal indoor bay
Busbar Supply,IP rating / environment suitability,,,,Check dust heat humidity outdoor exposure,No environment suitability statement
Busbar Supply,Expansion joints,,,,Required for long runs or temperature variation,No expansion provision on long bay
Busbar Supply,Joint kits and covers,,,,Check included quantity and joint protection,Joints excluded or unclear
Busbar Supply,Hangers / brackets,,,,Check spacing and structural fixing scope,Supports excluded from quote
Collectors,Collector current rating,,,,Rating should suit crane current and duty,Collector rating lower than operating load
Collectors,Number of collector shoes,,,,Ask if spare shoes / twin collectors needed,Single collector for high duty application
Collectors,Collector make and spare availability,,,,Check local availability and replacement cost,Unknown make with no spare support
Feed & Protection,End feed / power feed box,,,,Check included with cable glands and terminals,Feed box excluded
Feed & Protection,Isolator / switch disconnector,,,,Clarify scope between buyer and vendor,Isolation not included anywhere
Feed & Protection,Earthing arrangement,,,,Confirm earth conductor and bonding,Earth path assumed through structure only
Installation,Installation scope,,,,Supply only / supervision / installation / commissioning,Scope boundary unclear
Installation,Alignment and commissioning checks,,,,Ask for collector tracking and joint inspection procedure,No commissioning checklist
Testing,FAT/SAT checks,,,,Confirm insulation resistance continuity trial run and voltage checks,No acceptance criteria stated
Spares,Recommended spares,,,,Collector shoes joint covers end caps fuses,No spares list
Commercial,Warranty,,,,Check warranty on busbar collectors and installation,Consumables excluded without clarity
Commercial,Documentation,,,,Ask for GA layout voltage drop calculation datasheet and manual,No documentation commitment