Product Manual

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Instruction book
3.3 Fuses and wire sizes
Values shown here have been determined using National Electrical Code (NFPA 70). Local electrical
code requirements my differ. Refer to your local electrical code.
Volts Single Phase
(V)
Volts Three Phase
(V)
Fuses
(Dual Element
Time-Delay)
(A)
Wire Size
(minimum)
CR_5
230
-
50
10
CR_5
-
200
35
14
-
230
30
14
-
460
15
14
-
575
15
14
CR_7.5
230
-
70
8
CR_7.5
-
200
45
10
-
230
40
12
-
460
20
14
-
575
20
14
CR_10
-
200
60
10
-
230
50
10
-
460
25
14
-
575
20
14
CR_15
-
200
90
6
-
230
80
8
-
460
40
12
-
575
30
14
Motor Amperage
This is the maximum Full-Load Three Phase Standard Motors, 1.15 SF.
NEC Table 430.250
Single Phase Full-Load Motor Amps are from NEC Table 430-248
NEC Table 430.52 used for calculating Fuse size.
NEC 240.6 Used to select Standard Fuse Sizes
15, 20, 25, 30, 35, 40, 45, 50, 60, 70, 80, 90, 100, 110, 125, 150, 175, 200, 225, 250, 300, 350, 400, 450,
500, 600, 700, 800, 1000, 1200, 1600, 2000, 2500, 3000, 4000, 5000, and 6000 amperes.
NEC 430.24 used to determine minimum wire size needed.