Page 136 - Pipeline Rules of Thumb Handbook

Electrical Design 123

Table 5
Dimensions of Rubber-Covered and Thermoplastic-Covered Conductors

* The dimensions of Types RHH and RHW.
† Dimensions of THW in sizes No. 14 through No. 8. No. 6 THW and larger is the same dimension as TW.
*** Dimensions of RHH and RHW without outer covering are the same as THW No. 18 through No. 10, solid; No. 8 and larger, stranded.
**** In Columns 8 and 9 the values shown for sizes No. 1 through 4/0 are for TFE and Z only. The right-hand values in Columns 8
and 9 are for FEPB, Z, ZF, and ZFF only.
‡‡ No. 14 through No. 2.

Reprinted with permission from NFPA 70-1987, National Electrical Code, Copyright 1986, National Fire Protection Association,
Quincy, MA 02269. The reprinted material is not the complete and official position of the NFPA on the referenced subject which is
represented only by the standard in its entirety.