North American prices for PVC and polystyrene resins have moved in different directions since May 1, with PVC prices dropping while those for PS were on the rise. Regional PVC prices were down an ...

North American prices for polystyrene, suspension PVC and PET bottle resins all have tumbled since Aug. 1, reflecting declining demand and lower feedstock prices. Regional PS prices plummeted 25 cents ...

All questions and answers are based on the 2020 NEC. Q. What is the NEC requirement for securing and supporting PVC conduit? A. PVC conduit must be fastened and supported in accordance with Sec.

All questions and answers are based on the 2017 NEC. Q. What uses are not permitted for PVC conduit by the NEC? A. PVC conduit is not permitted to be used in the following locations: Hazardous ...