Nec Chapter 9 Table 5

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Nec Chapter 9 Table 5. For conductors not included in Chapter 9 such as multiconductor cables and optical fiber cables the actual dimensions shall be used. In the 2008 code that line is not there so all those dimensions refer to RHH RHW and RHW-2 as well.

Annex C Conduit And Tubing Fill Tables For Conductors And Fixture Wires Of The Same Size
Annex C Conduit And Tubing Fill Tables For Conductors And Fixture Wires Of The Same Size from flylib.com

Loads Facility loads eg motors and lights are users of electrical power and form the basis for calculating the size of an electrical system. 2The NEC ampacity tables and the IEEE Std 835 are based in the Neher-McGrath equation published in 195os. Table 5 from Chapter 9 of the NEC gives the approximate diameters and areas of different types of conductors a portion of which is presented as Table 7 in this document which shows THHW THHN THWN and XHHW.

Raceways conduits and tubing are not always used with security system wiring but if they are the raceway conduit or tubing must be sized according to the NEC.

Copper is assumed to be concentric and dimensions used are based on NEC Chapter 9 Table 5. Diam in Area inĀ². Chapter 9 Tables National Electrical Code Handbook 2011 1319 TABLE 5A Compact Copper and Aluminum Building Wire Nominal Dimensions and Areas Size AWG or kcmil Bare Conductor Types RHH RHW or USE Types THW and THHW Type THHN Type XHHW Size AWG or kcmil Diameter Approximate Diameter Approximate Area Approximate Diameter Approximate Area. In the 2008 code that line is not there so all those dimensions refer to RHH RHW and RHW-2 as well.