sizing tc ampacityi n cable tray

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patraig

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i sized vaious cables according to nec 392.9..i do not have anthing larger than 2/0 in tray..however...according to 392.11(3)..it somewhat states that space needs to be between cables in tray...does this mean i have to derate cable by bundle factor if i do not leave space between tc cable..does this change ampacity for the cables????can i stack tc cable in tray if it is all mixture of cables smaller than 4/0???
 
Re: sizing tc ampacityi n cable tray

Pat
Are you installing single conductor 2/0? If so 392.11A applies to multiconductor cables.
392.11B aplies to single conductor.
 
Re: sizing tc ampacityi n cable tray

none of my cables are single conductors..all of them are multi conductor tc cable that has only three current carring conductors...does this mean i have to size appacity according to 392.11 and which goes to 310.15(c)
 
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