ARTICLE 390. UNDERFLOOR RACEWAYSARTICLE 390. UNDERFLOOR RACEWAYS390.3. Use. Underfloor raceway (now defined in 390.2) was developed to provide a practical means of bringing conductors for lighting, power, and signaling systems to office desks and tables (Fig. 390-1). It is also used in large retail stores, making it possible to secure connections for display-case lighting at any desired location.
Frederic P. Hartwell; Joseph F. McPartland; Brian J. McPartland: McGraw-Hill's National Electrical Code 2017 Handbook, 29th Edition. ARTICLE 390. UNDERFLOOR RACEWAYS, Chapter (McGraw-Hill Professional, 2017), AccessEngineering