How many grounding connections can a distribution box have

A distribution box can have multiple grounding connections, provided all equipment grounding conductors are properly bonded and continuity is maintained.General GuidelinesEach distribution box and its connected equipment must be grounded. In metal boxes, grounding conductors are attached to the box using a ground screw or clip, while in plastic boxes, grounding continuity is maintained by connecting all equipment grounding conductors together inside the box rather than to the box itself (NEC 250.148) . There is no strict limit on the number of grounding connections, but all connections must ensure a continuous, low-resistance path to the main grounding system.Wire Sizing and ResistanceIn the US, a 10 AWG (5.26 mm²) ground wire is typically used, while in other markets a 6 mm² wire is standard .The total ground resistance between system parts should be less than 0.1 ohm to ensure safety .For multiple spindles or long tool cables, additional grounding wires may be required to maintain low resistance .Practical ConsiderationsAll equipment grounding conductors spliced or terminated within the box must be connected together to maintain continuity .The arrangement should ensure that removing any device (like a receptacle or luminaire) does not interrupt the grounding path .A dedicated ground bar in the cabinet is recommended to organize multiple connections and prevent double-tapping neutrals .SummaryIn practice, a distribution box can accommodate as many grounding connections as needed, as long as:All connections are secure and continuous.The total resistance remains within safe limits.Metal boxes use proper attachment points, and plastic boxes bond all conductors together. This ensures effective grounding, protection against electrical faults, and compliance with NEC and international standards .