Table 5 Dimensions of Insulated Conductors and Fixture Wires Type Size (AWG or kcmil) Approximate Diameter Approximate Area mm in. mm2 in.2 Type: FFH-2, RFH-1, RFH-2, RHH*, RHW*, RHW-2*, RHH, RHW, RHW-2, SF-1, SF-2, SFF-1, SFF-2, TF, TFF, THHW, THW, THW-2, TW, XF, XFF RFH-2, FFH-2 18 3.454 0.136 9.355 0.0145 16 …