North America applicable cable

NORTH AMERICAApplicable cable

1ST,STO,SE

  • Reference standardNFPA70 2023Edition, NFPA79 2021Edition

  • Current carrying capacities(A)※1

    (Ambient temperature other than 30℃) =
  • 1Current carring capacity for 3c
    x
  • 2Correction Factor by Number of wires(4c～)
    x
  • 3Temperature correction factor

※1 This calculation method applies only correction factor by number of wires and temperature correction factor. The adjustment factor may differ according to operating conditions. Please refer to NFPA70. NFPA79.

1Current carrying capacities(A) applied by size and the number of cores.(at30 deg., Ambient temperature)

Size（AWG） 2c 3c
18 10 7
16 13 10
14 18 15
12 25 20
10 30 25
8 40 35
6 55 45
4 70 60
2 95 80

2Correction factor by number of wires(4c～)

No. of cores Correction factor
4 - 6c 0.80
7 - 9c 0.70
10 - 20c 0.50
21 - 30c 0.45
31 - 40c 0.40
41c and above 0.35

3Temperature correction factor

Ambient temperature(℃) Correction factor
10 or less 1.15
11 - 15 1.12
16 - 20 1.08
21 - 25 1.04
26 - 30 1.00
31 - 35 0.96
36 - 40 0.91
41 - 45 0.87
46 - 50 0.82
51 - 55 0.76
56 - 60 0.71
61 - 65 0.65
66 - 70 0.58
71 - 75 0.50
76 - 80 0.41
81 - 85 0.29
NORTH AMERICA APPICABLE CABLE
TOP Technical Info North America applicable cable ST,STO,SE (UL)

© 2020 NICHIGOH COMMUNICATION ELECTRIC WIRE CO.,LTD. All Rights Reserved.