Flexible Cord with Building Exhaust Fan

[cottora]

Our buildings have multiple 36" exhaust "box fans" (think warehouse fan). The fans are installed with wingnuts so that they can be removed for maintenance (monthly/quarterly). We would like to wire a flexible cord that plugs into a PDU which will be mounted horizontally on the wall. All wire sizing is sufficient, and the PDU is listed and sufficient for the fans (the PDU does not specify fans, just power distribution). I know that using flexible cord is only allowable under certain criteria. Is the fact that the fans are able to be easily removed for maintenance qualify for flex (or would it be viewed with the lens of how the fans are "usually" installed drive the decision)? Attached are pics. Thanks

 

[paulengr]

Tons of light fixtures are mounted that way. Since it’s field installed you would need to use SO and a field installable plug. The SO is vibration isolation,

 

[cottora]

Tons of light fixtures are mounted that way. Since it’s field installed you would need to use SO and a field installable plug. The SO is vibration isolation,

So SJT is out? The O is oil resistant?

 

[zbang]

I would not use either "J' ("Junior", 300v instead of 600v rating, somewhat thinner insulation) nor "T" (thermoplastic) unless the fans come with that factory-installed. Go for SO, SOW, SOOW, etc.

Generally-
S = Service Grade (also means extra hard service when not followed by J, V, or P)
J = Hard Service
V = Vacuum cleaner cord (also light duty cable)
P = Parallel cord (also known as zip cord)—Always light duty
E = Thermoplastic Elastomer (UL/NEC designation ONLY)
O = Oil Resistant*
T = Thermoplastic
* When only one "O" appears in a classification (i.e. SJEOW), only the outer jacket material is oil resistant. If two "O's" are in the classification (i.e. SEOOW), the insulation covering the conductors and the outer jacket insulation are all oil resistant.