Dan Chujko & Associates, L.L.C.

Selection of Portable Cord

Technical Information

Table 400-5(a). Allowable Ampacity for Flexible Cords and Cables. [Based on Ambient Temperature of 30^oC (86^oF) See Table 400-4.]
Source: NFPA70 - The National Electric Code

Thermoset Type
TS

Thermoset Types
C, E, EO, PD, S, SJ, SJO, SJOO,
SO, SOO, SP-1, SP-2, SP-3, SRD, SV, SVO, SVOO

Size
(AWG)

Thermoplastic
Types TPT. TST

Thermoplastic Types
ET, ETLB, ETP, ETT, SE, SEO,
SJE, SJEO, SJT, SJTO, SJTOO,
SPE-1, SPE-2, SPE-3, SPT-1,
SPT-2, SPT-3, ST,
SRDE, SRDT, STO, STOO,
SVE, SVEO, SVT, SVTO, SVTOO

Types
HPD, HPN.
HS, HSJ,
HSO, HSJO,
HSOO,
HSJOO

  27*
20
18
17
16
15
14
12
10
  8
  6
  4
  2

0.5
—
—
—
—
—
—
—
—
—
—
—
—

A+
—
5**
7
—
10
—
15
20
25
35
45
60
80

B†
—
***
10
12
13
—
18
25
30
40
55
70
95

—
—
10
—
15
17
20
30
35
—
—
—
—

* Tinsel Cord.
** Elevator Cables Only
*** 7 amperes for elevator cables only, 2 amperes for other types
+ The allowable currents under sub-heading 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 sub-heading B apply to 2 conductor cords connected to utilization equipment so that only 2 conductors are current carrying.

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