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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
Circuit breaker 
  panelboardsIndoor 120/208 volt C.B. panelboards (NQO) with plug-in breakers to 60 amps and main breaker   | Indoor 120/240 volt C.B. panelboards (NQOB) with breakers to 60 amps, with main lugs only   | Indoor 120/240 volt C.B. panelboards with bolt-on breakers to 60 amps and main breaker   | NEMA 1 telephone & signal terminal cabinets with keyed door lock, wood backing