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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
Double pole 
  commercial decorator switchesTop of Page 231  
  commercial switchesTop of Page 224  
  industrial switchesTop of Page 225  
  maintain contact switchesMaintain contact, three position, 2 circuit, center-off, keyed type, 20 amp, 120/277 volt, double throw switches  
  momentary contact switchesSpare key for keyed type  
  specification-grade switchesTop of Page 230