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NEC 392.(B)(1) Single-conductor cable 1/0 or larger in Cable Tray

NEC 392.(B)(1) Single-conductor cable 1/0 or larger in Cable Tray

NEC 392.(B)(1) Single-conductor cable 1/0 or larger in Cable Tray

(OP)
Could anyone explain to me why NEC requires single-conductor cables installed in cable trays to be 1/0 or larger? Why not anything smaller?
 

RE: NEC 392.(B)(1) Single-conductor cable 1/0 or larger in Cable Tray

Physical strength of the conductor.

RE: NEC 392.(B)(1) Single-conductor cable 1/0 or larger in Cable Tray

Quote:

Physical strength of the conductor.
Or, more precisely, the insulation.

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