Conduit SizeJignesh.Parmarwww.electricalnotes.wordpress.comjiguparmar@yahoo.comNo of ConductorSize of ConductorType of InsulationCalculated AreaType of Insulation12AWG(35 mm2)THHN0.1158RHW= RHW & RHW212AWG(4 mm2)RHW0.0706THHN= THHN & THWN51/0AWG(55 mm2)RHW1.5195THW= THW, TW, & THWN110AWG(6 mm2)RHW0.0437XHHW= XHHW & XHH0LVLow Voltage Cable0FiberFiber Optic Cable00Type of ConduitNo of ConductorType of CableSize of ConductorCalculated AreaEMT= Electrical Metallic Tubing (Thinwall)ENT= Electrical Non-Metallic Tubing (Smurf Tube)1Fiber2f0.0266FMC= Flexible Metal Conduit1LVCAT50.0346IMC= Intermediate Metal Conduit0.0000LFNC_A= Liquidtight Flexible Non-Metallic Conduit Type A0.0000LFNC_B= Liquidtight Flexible Non-Metallic Conduit Type B0.0000LFMC= Liquidtight Flexible Metal Conduit (Sealtite)0.0000RMC= Rigid Metal Conduit (GRC)0.0000PVC-40= Schedule 40 PVC (Plastic)PVC-80= Schedule 80 PVC (Plastic)Total Area1.8111.810.4Conduit TypeRMC4.53Minimum Conduit Size2-1/2"

DESIGN OF CONDUIT SIZE FOR LT/CAT-5/FIBRE OPTICAL CABLEJignesh.Parmar

Sheet2Wire SizeTHW SizeTHHN SizeRHW SizeXHHW SizeConduit TableConduit Fill RatesCable TableLow Voltage Wire SizeFiber Wire Size14 AWG(2.5 mm2)0.01390.00970.02930.0139EMTLV12AWG(4 mm2)0.01810.01330.03530.0181ENT153%Fiber22/20.01472f0.026610AWG(6 mm2)0.02430.02110.04370.0243FMC231%22/30.01724f0.03148AWG(10 mm2)0.04370.03660.08350.0437IMC340%22/40.02016f0.03806AWG(16 mm2)0.07260.05070.10410.0590LFNC_A22/60.02848f0.04344AWG(25 mm2)0.09730.08240.13330.0814LFNC_B22/80.034612f0.05113AWG(35 mm2)0.11340.09730.15210.0962LFMC20/20.018424f0.19322AWG(35 mm2)0.13330.11580.17500.1146RMC20/30.021436f0.32571AWG(50 mm2)0.19010.15620.26600.1534PVC4020/40.025448f0.30881/0AWG(55 mm2)0.22230.18550.30390.1825PVC8020/60.035372f0.48272/0AWG(70 mm2)0.26240.22230.35050.219018/20.022296f0.72533/0AWG(95 mm2)0.31170.26790.40720.2642Type of Insulation18/30.0269144f0.84464/0AWG(120 mm2)0.37180.32370.47540.3197RHW= RHW & RHW18/40.0317250 Kcmill0.45960.39700.62910.3904THHN= THHN & THWN18/60.0491300 Kcmill0.52810.46080.70880.4536THW= THW, TW, & THWN18/80.0661350 Kcmill0.59580.52420.78700.5166XHHW= XHHW & XHH16/20.0287400 Kcmill0.66190.58630.86260.578216/40.0449500 Kcmill0.79010.70731.00820.698414/20.0479600 Kcmill0.97290.86761.21350.870914/40.0693700 Kcmill1.10100.98871.35610.992312/20.0661750 Kcmill1.16521.04961.42721.053212/40.0881800 Kcmill1.22721.10851.49571.1122CAT30.0346900 Kcmill1.35611.23111.63771.2351CAT50.03461000 Kcmill1.47841.34781.77191.3519EMT ConduitDiaRMC ConduitDiaPVC-80 ConduitDiaENT ConduitDiaFMC ConduitDiaIMC ConduitDiaLFNC-A ConduitDiaLFNC-B ConduitDiaLFMC ConduitPVC-40 Conduit01/2"01/2"01/2"01/2"03/8"01/2"03/8"03/8"03/8"01/2"0.3041/2"0.3141/2"0.2171/2"0.2461/2"0.1163/8"0.3421/2"0.1923/8"0.1923/8"0.1923/8"0.2581/2"0.3053/4"0.3153/4"0.2183/4"0.2473/4"0.1171/2"0.3433/4"0.1931/2"0.1931/2"0.1931/2"0.2593/4"0.5333/4"0.5493/4"0.4093/4"0.4543/4"0.3171/2"0.5863/4"0.3121/2"0.3141/2"0.3141/2"0.5083/4"0.5341"0.5501"0.4101"0.4551"0.3183/4"0.5871"0.3133/4"0.3153/4"0.3153/4"0.5091"0.8641"0.8871"0.6881"0.7851"0.5333/4"0.9591"0.5353/4"0.5413/4"0.5413/4"0.8321"0.8651-1/4"0.8881-1/4"0.6891-1/4"0.7861-1/4"0.5341"0.9601-1/4"0.5361"0.5421"0.5421"0.8331-1/4"1.4961-1/4"1.5261-1/4"1.2371-1/4"1.4101-1/4"0.8171"1.6471-1/4"0.8541"0.8731"0.8731"1.4531-1/4"1.4971-1/2"1.5271-1/2"1.2381-1/2"1.4111-1/2"0.8181-1/4"1.6481-1/2"0.8551-1/4"0.8741-1/4"0.8741-1/4"1.4541-1/2"2.0361-1/2"2.0711-1/2"1.7111-1/2"1.9361-1/2"1.2771-1/4"2.2251-1/2"1.5021-1/4"1.5281-1/4"1.5281-1/4"1.9861-1/2"2.0372"2.0722"1.7122"1.9372"1.2781-1/2"2.2262"1.5031-1/2"1.5291-1/2"1.5291-1/2"1.9872"3.3562"3.4082"2.8742"3.2052"1.8581-1/2"3.6302"2.0181-1/2"1.9811-1/2"1.9811-1/2"3.2912"3.3572-1/2"3.4092-1/2"2.8752-1/2"3.206N/A1.8592"3.6312-1/2"2.0192"1.9822"1.9822"3.2922-1/2"5.8582-1/2"4.8662-1/2"4.1192-1/2"3.2692"5.1352-1/2"3.3432"3.2462"3.2462"4.6952-1/2"5.8593"4.8673"4.1203"3.2702-1/2"5.1363"3.344N/A3.247N/A3.2472-1/2"4.6963"8.8463"7.4993"6.4423"4.9092-1/2"7.9223"4.8812-1/2"7.2683"8.8473-1/2"7.5003-1/2"6.4433-1/2"4.9103"7.9233-1/2"4.8823"7.2693-1/2"11.5453-1/2"10.0103-1/2"8.6883-1/2"7.0693"10.5843-1/2"7.4753"9.7373-1/2"11.5464"10.0114"8.6894"7.0703-1/2"10.5854"7.4763-1/2"9.7384"14.7534"12.8824"11.2584"9.6213-1/2"13.6314"9.7313-1/2"12.5544"14.754N/A12.8835"11.2595"9.6224"13.632N/A9.7324"12.5555"20.2125"17.8555"12.5664"12.6924"19.7615"20.2136"17.8566"12.567N/A12.693N/A19.7626"29.1586"25.5986"28.5676"29.159N/A25.599N/A28.568N/ACable Size Table22/222/322/422/622/820/220/320/420/618/218/318/418/618/816/216/414/214/412/212/4CAT3CAT52f4f6f8f12f24f36f48f72f96f144f