National Electrical Code 1981 /
National
- USA National Fire Protection Association August 1980
- 70-681p;
General (Page-1), Wiring design and protection (Page-25), Wiring methods and materials (Page 113), Equipment for general use (Page-247), Special occupancies (Page-376), Special equipment (Page- 513), Special conditions (Page-577), Communication systems (Page-617), Tables and examples (Page-632).