CT Sizing Calculator

Size (AWG/MCM)THW/THHW/TW Insulation Min (In.)THW/THHW/TW Insulation Max (In.)TFN/THHN/THWN Insulation Min (In.)TFN/THHN/THWN Insulation Max (In.)
24 AWG0.0590.0880.0200.024
22 AWG0.0660.0940.0250.031
20 AWG0.0710.1010.0320.038
18 AWG0.0840.1110.0400.049
16 AWG0.0960.1240.0510.060
14 AWG0.1110.1330.0640.073
12 AWG0.1300.1520.0810.095
10 AWG0.1640.1760.1020.116
8 AWG0.2160.2360.1280.146
6 AWG0.2540.3040.1620.184
4 AWG0.3240.3520.2040.232
3 AWG0.3520.3800.2290.260
2 AWG0.3840.4200.2580.292
1 AWG0.4460.4920.2890.332
250 MCM0.7110.7650.5000.575
300 MCM0.7660.8200.5480.630
350 MCM0.8170.8710.5920.681
400 MCM0.8640.9180.6330.728
500 MCM0.9491.0030.7070.813
600 MCM1.0511.1130.7750.893
700 MCM1.1221.1840.8370.964
750 MCM1.1561.2180.8660.998
800 MCM1.1881.2500.8941.031
900 MCM1.2521.3140.9491.093
1000 MCM1.3101.3721.0001.152
1250 MCM1.5391.1211.289
1500 MCM1.6621.2281.412
1750 MCM1.7761.3271.526
2000 MCM1.8821.4191.632

Current Transformers

Bender has a range of current transformers for load currents (operating currents) and residual currents (RCM). Different designs cover a variety of installation situations and metrological requirements, and enable retrofitting. 

Find Current Transformers!