What is this type of wire called?
I've been looking for a longer cord, or just bulk wire without ends for a table saw. I'd like the cord flat as it has to run along the floor, and most extension cords are fat and round, while most appliance type cords are too short. (Or can I use romex?)
Best Answer
Parallel cables are designated the NEC as lighter duty than most round cables. Cables that are flat are designated as Type SP, SPT-1,2 or 3, Service duty Parallel or Service duty Parallel Thermoset 1,2, or 3 grade level. Service duty indicates Not Hard Usage, while most round cables (SExx, SOxx, or SJxx) are designated Hard Usage or Extra Hard Usage.
The primary construction deficiency you will find with Parallel cables is single layer of insulation. Hard Usage cables have insulated wires inside an insulating jacket.