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Flexible Metallic Conduit

Flexible Metallic Conduit (FMC) provides alternative where a rigid conduit would be difficult to install due to bending need. The below table of Flexible Metallic Conduit is in line with NEC.

FLEXIBLE METAL CONDUIT (FMC)
Trade Size Nominal Internal Diameter Total Area
100%
60% 1 Wire
53%
2 Wires
31%
Over 2 Wires
40%
mm in. mm2 in.2 mm2 in.2 mm2 in.2 mm2 in.2 mm2 in.2
9.70.384740.116440.070390.061230.036300.046
½16.10.6352040.3171220.1901080.168630.098820.127
¾20.90.8243430.5332060.3201820.2821060.1651370.213
125.91.0205270.8173160.4902790.4331630.2532110.327
1 ¼32.41.2758241.2774940.7664370.6772550.3963300.511
1 ½39.11.5381,2011.8587211.1156370.9853720.5764800.743
251.82.0402,1073.2691,2641.9611,1171.7336531.0138431.308
2 ½63.52.5003,1674.9091,9002.9451,6792.6029821.5221,2671.964
376.23.0004,5607.0692,7364.2412,4173.7471,4142.1911,8242.828
3 ½88.93.5006,2079.6213,7245.7733,2905.0991,9242.9832,4833.848
4101.64.0008,10712.5664,8647.5404,2976.6602,5133.8953,2435.026

Conduit is able to contain an allowable fill percent. Hence, a conduit fill calculation is provide here.