NEC 408.41 - Is Doubling-up wires allowed for Neutral busbar and/or Ground busbar? Why/not?

NEC 408.41 - Is Doubling-up wires allowed for Neutral busbar and/or Ground busbar? Why/not? In response to this Stack Exchange question, I wasn't sure how to properly interpret the quoted NEC statement (the comment below about its title/section/topic, from the original post, is left in the quote for clarity): neutral & ground wiring regarding Non-Separately Derived System plus labels.... NEC 408.41: Each grounded conductor (neutral) must terminate within the panel board in an individual terminal that is not used for another conductor. Does the excerpt from NEC 408.41 basically mean "Don't double up (nor triple up, quadruple-up, etc) wires on the wire-end where the wire connects to the neutral bar, and the same restriction goes for the grounding bar"? Is the below Reddit post (and my interpretation of the Reddit post, including logical reasoning for the code's existence) consistent with NEC 408.41? External Research 1 I found this Reddit post, which seems to hint at: For the ground busbar, wire gauge must be an equivalent size (per wire located within a single terminal) before being allowed to double up wires. Also implied: tripling-up (and higher) per ground terminal is not allowed. I.e., there is at least one circumstance where doubling up multiple wires per single terminal slot is allowed, but it only applies to the ground busbar, and a maximum of just two wires per terminal slot, and the wire's gauges (assuming stripped of insulation) must be identical. No restriction about solid wire vs stranded wire exists when considering doubling up wires per terminal (at least in NEC 408.41, though I'd like to know if this is a restriction that is mentioned anywhere). For the neutral busbar, absolutely no doubling up (nor tripling-up, etc) of multiple wires per terminal. The reasoning being that the removal of a typically-connnected neutral wire (e.g., for maintenance to clean a connection of corrosion or re-run a branch circuit) may (temporarily) convert a normally-"wild leg" (208V?) circuit voltage to a higher, dangerous (for humans, fragile circuits, flammable materials) 240V. I'm assuming that this is only an issue if: A) the important breaker(s), the one(s) that supplies energy ("hot") to each device that happens to utilize that doubled-up (or tripled-up, etc) neutral wire, is not shut off, either due to being A.1) located in a completely different location (being located in a different subpanel comes to mind...), or A.2) no "good ideas of preventative safety" of pre-emptively shutting off possibly related breakers before working on them, or A.3) some other "hacky" reason. B) Multiple wires per terminal means more cramming of wires, which means B.1) more physical stress on metals like copper wire strands (irreversible metal grain fracturing - "wire weakening"/embrittlement/loss-of-continuity) from squishing and/or long-term vibration, which also causes B.2) higher electrical resistance due to lower cross-sectional area per wire (effectively, wire extrusion/diameter-thinning due to cramming of wires), and/or possibly B.3) (only applies to stranded wires) splayed wires (where not all strands, of both wires, are actually inside the terminal, some strands are splayed outside the terminal) that causes lower-than-rated ampacity and the same resistance and brittleness issues associated with B.1) and B.2). Major edit: Found a new source 2 I also found a Mike Holt forum discussion, where dnem's answer seems to provide two valid reasons for never doubling up a neutral wire. 2.1) Imbalanced resistance in each branch circuit when a parallel neutral (not near panel) all of a sudden becomes serial when the middle neutral that was formerly tied to the panel has now disappeared, leading to unexpected voltage drops (not each being 120V) at each of the first and second devices in series. This unexpected voltage drop fries one or both devices. My diagram according to my understanding of the above issue D1, D2 are Device1, Device2 H is "Hot wire endpoint" N is "Neutral wire endpoint" 120V is "This specific device 'used up' 120V" 120V 120V D1 H--H D2 H--------H SupplyHot N N | | N N NeutralBusbar becomes !? !? D1 H--H D2 H--------H SupplyHot N N | | ConnectionToNeutralBusbarDisappeared! N NeutralBusbar 2.2) Circuit stays energized (>0V) but appears dead ("looks like 0V") (when testing supply-to-neutral voltages with a voltmeter). This is dangerous, as touching the neutral will shock you continuously (if you touch the neutral even without touching the hot). Note: There is a fair chance that I'm confused or being too vague with terminology, so please mention any fundamental/confusion-causing mistakes I make (especially with NEC nomenclature, NEC sections that exist), and hopefully I can clarify my interpretations.