Table 400.5 Adjustment Factors for More Than Three Current-Carrying Conductors in a Flexible Cord or Cable
| Number of Conductors | Percent of Value in Tables 400.5(A) and 400.5(B) |
| 4 - 6 | 80 |
| 7 - 9 | 70 |
| 10 - 20 | 50 |
| 21 - 30 | 45 |
| 31 - 40 | 40 |
| 41 and above | 35 |
Table 400.5(A) Allowable Ampacity for Flexible Cords and Cables [Based on Ambient Temperature of 30°C (86°F). See 400.13.]
| Size (AWG) | Thermoplastic Types TPT, TST | Thermoset Types C, E, EO, PD, S, SJ, SJO, SJOW, SJOO, SJOOW, SO, SOW, SOO, SOOW, SP-1, SP-2, SP-3, SRD, SV, SVO, SVOO |
Types HPD, HPN, HSJ, HSJO, HSJOO | |
| Thermoplastic Types ET, ETLB, ETP, ETT, SE, SEW, SEO, SEOW, SEOOW, SJE, SJEW, SJEO, SJEOW, SJEOOW, SJT, SJTW, SJTO, SJTOW, SJTOO, SJTOOW, SPE-1, SPE-2, SPE-3, SPT-1, SPT-1W, SPT-2, SPT-2W, SPT-3, ST, SRDE, SRDT, STO, STOW, STOO, STOOW, SVE, SVEO, SVT, SVTO, SVTOO |
||||
| A+ | B+ | |||
| 27* | 0.5 | – | – | – |
| 20 | – | 5** | *** | – |
| 18 | – | 7 | 10 | 10 |
| 17 | – | – | 12 | 13 |
| 16 | – | 10 | 13 | 15 |
| 15 | – | – | – | 17 |
| 14 | – | 15 | 18 | 20 |
| 12 | – | 20 | 25 | 30 |
| 10 | – | 25 | 30 | 35 |
| 8 | – | 35 | 40 | – |
| 6 | – | 45 | 55 | – |
| 4 | – | 60 | 70 | – |
| 2 | – | 80 | 95 | – |
*Tinsel cord.
**Elevator cables only.
***7 amperes for elevator cables only; 2 amperes for other types.
+The allowable currents under subheading A apply to 3-conductor cords and other multiconductor cords connected to utilization equipment so that only 3 conductors are current carrying. The allowable currents under subheading B apply to 2-conductor cords and other multiconductor cords connected to utilization equipment so that only 2 conductors are current carrying.