ARTICLE 390. UNDERFLOOR RACEWAYS


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ARTICLE 390. UNDERFLOOR RACEWAYS
ARTICLE 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.
Underfloor raceway system, with spaced grouping of three ducts (one for power, one for telephone, one for signals), is covered with concrete after installation on fi…
Citation
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 Export