Sources
Each table was read from the 2023 NEC and checked against the published copies below on 28 October 2026.
- table4 EMT: lorisweb.com, conduit.site, necaibewelectricians.com, wirefillchart.com
- table4 IMC: lorisweb.com, conduit.site, necaibewelectricians.com, wirefillchart.com
- table4 RMC: lorisweb.com, conduit.site, necaibewelectricians.com, wirefillchart.com
- table4 PVC-40: lorisweb.com, conduit.site, necaibewelectricians.com, wirefillchart.com
- table4 PVC-80: lorisweb.com, conduit.site, necaibewelectricians.com, wirefillchart.com
- table4 FMC: lorisweb.com, conduit.site, necaibewelectricians.com, wirefillchart.com
- table4 LFMC: lorisweb.com, conduit.site, necaibewelectricians.com
- table4 ENT: lorisweb.com, conduit.site, wirefillchart.com
- table4 LFNC-A, LFNC-B: lorisweb.com, conduit.site, necaibewelectricians.com
- table4 HDPE, PVC-A, PVC-EB: lorisweb.com, conduit.site, necaibewelectricians.com
- table5 THHN/THWN-2, XHHW-2, THW-2, RHH/RHW-2: lorisweb.com, cdck-file-uploads-global.s3.dualstack.us-west-2.amazonaws.com, necaibewelectricians.com, conduit.site
- table8: lorisweb.com, necaibewelectricians.com
- table_314_16B: petersonelectricllc.com, necaibewelectricians.com, zing2.app, ideadigitalcontent.com
- table_314_16A: petersonelectricllc.com, necaibewelectricians.com, ideadigitalcontent.com, zing2.app
- Chapter 9 Table 1 + Notes 4 and 7: lorisweb.com, petersonelectricllc.com, conduit.site, open-exam-prep.com, zing2.app
- bends 358.26 / 352.26 / 344.26: petersonelectricllc.com, ecmweb.com, open-exam-prep.com
- support EMT 358.30: petersonelectricllc.com, open-exam-prep.com, expertce.com
- support PVC 352.30 / Table 352.30: petersonelectricllc.com, 2027staging.ffa.org, open-exam-prep.com, ecmweb.com
- support RMC 344.30 / IMC 342.30 / Table 344.30(B)(2): petersonelectricllc.com, ecmweb.com, ecmweb.com, open-exam-prep.com
- support FMC 348.30 / LFMC 350.30: petersonelectricllc.com, ecmweb.com, ecmweb.com
- edition caveat: lorisweb.com, conduit.site, wirefillchart.com
- Table 310.16 Cu and Al, 14 AWG/12 AWG Al through 1000 kcmil, all columns: helukabel.us, turn2engineering.com
- Table 310.15(C)(1) adjustment factors: helukabel.us, turn2engineering.com, wiresizes.com
- 240.4(D) small conductor OCPD limits: helukabel.us, encorewire.com, ecmweb.com, forum.nachi.org