Raceway Percentages

Raceway Percentages Check Values

Find formulas for these calculations in Reference Formulas Appendix page 30.

Find practice problems HERE.

Check values based on a 1" EMT raceway 10' long with 6 #10 THW conductors.

total area = .864 square inches (Chapter 9 Table 4)

useful area % = 40%

useful area = .346 square inches (Chapter 9 Table 5)

Used % = 16.875

Useful % = 40

Used area = .1458

unused area = .2002

unused % = 23.125

Remaining useful area = .2002

Remaining useful % = 23.125

 
 

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