@bacobits1 hits the nail on the head - Don't do this.
Even in conduit, the temperature/humidity changes in a crawl space will result in condensation that will dampen your cotton dielectric. If you cannot keep the wire "in the house" I would look for something other than Duelund.
@grannyring made a good suggestion with the WE wire, that has a rubber covering under the cotton and that comes in 10 ga, which would be better for your application.
You might also look into Supra, that offers tin-coated copper wires in a variety of gauges and that come in a "heat and aging resistant PVC jacket."
Whichever option you choose, I would strongly recommend running PVC conduit, which will help with humidity/moisture issues, keep rodents away from the wires, and which will make it easier to change cables if you ever want to.
Even in conduit, the temperature/humidity changes in a crawl space will result in condensation that will dampen your cotton dielectric. If you cannot keep the wire "in the house" I would look for something other than Duelund.
@grannyring made a good suggestion with the WE wire, that has a rubber covering under the cotton and that comes in 10 ga, which would be better for your application.
You might also look into Supra, that offers tin-coated copper wires in a variety of gauges and that come in a "heat and aging resistant PVC jacket."
Whichever option you choose, I would strongly recommend running PVC conduit, which will help with humidity/moisture issues, keep rodents away from the wires, and which will make it easier to change cables if you ever want to.