ABYC definition of “conduit”

[Drennan]

Owing to space constraints, I must place a Class-T fuse 25”-30” from my LFP house battery. ABYC code permits up to 40” through “conduit”.

Am I limited to flexible/rigid PVC & metal conduit, or might some other, and more flexible types of cable enclosure be acceptable? If not, I’ll need a much different plan B.

Thank you