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Instruction Leaflet IL040047EN
Effective January 2022
Cable and fuse guidelines
North American cable and fuse sizes—380 Vac to 500 Vac ratings
460 V input
Frame
Amp
current
size
suffix
(CT/I
)
H
FR7
0385
311
0460
391
0520
459
0590
515
FR8
0650
587
0730
642
0820
731
0920
815
1040
908
1180
908
1
Line and motor cable size is selected according to UL 508C Table 40.3 for copper conductor rated 75 °C. Use only with copper wire rated 75 °C here.
Size requirements for other different wire types are defined in the National Electrical Code, ANSI/NFPA 70.
2
Earthing conductor size is determined by the maximum overcurrent device rating used ahead of the drive according to UL 508C Table 6.4.
3
If power cubes or bypass are used, a UL listed Class J, T, or equivalent fuse is recommended.
International cable and fuse sizes—380 Vac to 500 Vac ratings
Input
Frame
Amp
current
size
suffix
(CT/IH)
FR7
0385
311
0460
391
0520
459
0590
515
FR8
0650
587
0730
642
0820
731
0920
815
1040
908
1180
908
1
Line and motor cable size is selected according to IEC 60364–5–52:2009 Table B.52.4 for copper conductor with PVC insulation with a wiring condition of ambient
temperature 30 °C in air and an installation method of "B2" (cables in conduit and cable trunking systems). For other wiring conditions, please refer to the standard
of IEC 60364–5–52:2009 for suitable cable sizes.
2
Earthing conductor size is determined by the cross–sectional area of phase conductors according to IEC/EN61800–5–1:2007 Table 5. So if phase conductor size is
changed, earthing conductor size should also be changed accordingly.
3
If power cubes or bypass are used, a Class gG/gL fuse is recommended.
12
EATON
www.eaton.com
460 V input
Current
Current
current
(CT/I
)
(VT/I
)
H
L
(VT/I
)
at 50 °C
at 40 °C
L
385
310
385
460
385
460
520
460
520
590
520
590
648
590
650
724
650
730
822
730
820
916
820
920
1030
920
1040
1164
1050
1180
Input
Current
Current
current
(CT/IH)
(VT/IL)
(VT/IL)
at 50 °C
at 40 °C
385
310
385
460
385
460
520
460
520
590
520
590
648
590
650
724
650
730
822
730
820
916
820
920
1030
920
1040
1164
1040
1180
NEC wire size (AWG)
Recommended
fuse rating
Line and motor
500
2x250 kcmil
600
2x350 kcmil
700
3x4/0
800
3x250 kcmil
2x400
4x4/0
2x500
4x300
2x600
4x350
2x600
6x4/0
2x600
6x250
2x700
6x300
Recommended
fuse rating
Line and motor
400
2x(3x120+70)(Cu)
2x(3x185+57)(AI)
500
2x(3x185+95)(Cu)
2x(3x240+572)(AI)
630
2x(3x185+95)(Cu)
2x(3x150+41)(AI)
630
2x(3x240+120)(Cu)
2x(3x185+57)(AI)
2x355
4x(3x95+50)(Cu)
4x(3x120+41)(AI)
2x400
4x(3x95+50)(Cu)
4x(3x150+41)(AI)
2x500
4x(3x120+70)(Cu)
4x(3x185+57)(AI
2x500
4x(3x150+70)(Cu)
4x(3x240+72)(AI)
2x630
4x(3x185+95)(Cu)
6x(3x150+41)(AI)
2x630
4x(3x240+120)(Cu)
6x(3x185 +57)(AI)
PowerXL FR7 and FR8 Series VFD
Terminal connection size (AWG)
Line and motor
bolt size
Ground bolt size
1 AWG–350 kcmil
1 AWG–350 kcmil
1 AWG–350 kcmil
1 AWG–350 kcmil
1 AWG–350 kcmil
1 AWG–350 kcmil
1 AWG–350 kcmil
1 AWG–350 kcmil
1 AWG–350 kcmil
1 AWG–350 kcmil
1 AWG–350 kcmil
1 AWG–350 kcmil
1 AWG–350 kcmil
1 AWG–350 kcmil
1 AWG–350 kcmil
1 AWG–350 kcmil
1 AWG–350 kcmil
1 AWG–350 kcmil
1 AWG–350 kcmil
1 AWG–350 kcmil
Line and motor
bolt size
Ground bolt size
M12
M8
M12
M8
M12
M8
M12
M8
M12
M8
M12
M8
M12
M8
M12
M8
M12
M8
M12
M8
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