Chapter Nine

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Chapter Nine
1010603 Chapter Nine
TABLES The basic requirements governing the maximum permitted fill for raceways and tubing recognized by the NEC are covered in Table 1 of Chap. 9. That table shows 53 percent as the maximum cross-sectional area of a raceway or tube that may be occupied by a conductor, where a single conductor is run within a raceway or tube. Where there are two conductors within the raceway or tube, then the maximum permitted fill— the area occupied by the conductors—is reduced to no more than 31 percent of the raceway or tube's c…
Frederic P. Hartwell; Joseph F. McPartland; Brian J. McPartland: McGraw-Hill's National Electrical Code® 2014 Handbook, Twenty-Eighth Edition. Chapter Nine, Chapter (McGraw-Hill Professional, 2014), AccessEngineering Export