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The 2017 National Electrical Estimator has a complete cross-referenced index. Find the subject you need in the left column. Then click on the subject link in the right column to jump to the costbook page.

2017 National Electrical Estimator

Subject Subject links
Schedule 40 PVC 
  conduit30 degree Schedule 40 PVC elbows  
  couplings2" range expansion PVC couplings  | Schedule 40 PVC couplings  
  elbowsSchedule 40 PVC couplings