Leading you to an educated decision.
Type THW is a single conductor ground wire suitable for non-grounded multi-conductor cables. Compatible with twisted, heavy-duty, jacketed, or parallel cables. These wires are manufactured to UL standard Type THW. The solid bare copper conductor is insulated with a moisture-resistant, polyvinyl chloride (PVC) insulation.
For installation in conduits and other raceways
Oil and grease resistant insulation
Abrasion and crush resistant
THW insulation is flame retardant PVC and meets the UL VW-1 flame test
Maximum continuous conductor temperature: 75°C Dry, 75°C wet