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P
OWER CABLING
4.1.1.3
Cable and fuse sizes, frames MR4 to MR6, North America
The recommended fuse types are gG/gL (IEC 60269-1) or class T (UL & CSA). The fuse volt-
age rating should be selected according to the supply network. The final selection should be
made according to local regulations, cable installation conditions and cable specification. Big-
ger fuses than what is recommended below shall not be used.
Check that the fuse operating time is less than 0.4 seconds. Operating time depends on used
fuse type and impedance of the supply circuit. Consult the factory about faster fuses. Honey-
well offers recommendations also for high speed J (UL & CSA ), aR (UL recognized, IEC
60269-4) and gS (IEC 60269-4) fuse ranges.
Frame
Type
230 P55
400 1P1
230 P75
400 1P5
230 1P1
400 2P2
MR4
230 1P5
400 3P0
230 2P2
400 4P0
230 3P0
400 5P5
230 4P0
400 7P5
230 5P5
MR5
400 11P
230 7P5
400 15P
400 18P 38.0
230 11P
400 22P
MR6
230 15P
*
400 30P
*. The 460V models require 90-degree wire to meet UL regulations
The cable dimensioning is based on the criteria of the Underwriters' Laboratories UL508C:Cables must
be PVC-isolated; Max ambient temperature +30°C, max temperature of cable surface +70°C; Use only
cables with concentric copper shield; Max number of parallel cables is 9.
When using cables in parallel,
area and the max number of cables must be observed.
For important information on the requirements of the earthing conductor, see standard Underwriters'
Laboratories UL508C.For the correction factors for each temperature, see the instructions of standard
Underwriters' Laboratories UL508C.
Fuse
I
L
(class T)
[A]
[A]
3.7
6
3.4
4.8
6
6.6
10
5.6
8.0
10
11.0
15
9.6
12.5
20
12.0
18.0
25
16.0
24.0
30
23.0
31.0
40
50
48.0
60
46.0
62.0
80
61.0
Table 16. Cable and fuse sizes (MR4 to MR6)
NOTE HOWEVER
Mains, motor
and ground
Main terminal Earth terminal
cable, Cu
AWG24-
AWG14
AWG10
AWG24-
AWG14
AWG10
AWG24-
AWG14
AWG10
AWG24-
AWG14
AWG10
AWG24-
AWG14
AWG10
AWG24-
AWG14
AWG10
AWG10
AWG20-AWG5 AWG17-AWG8
AWG10
AWG20-AWG5 AWG17-AWG8
AWG8
AWG20-AWG5 AWG17-AWG8
AWG4
AWG13-AWG0 AWG13-AWG2
AWG4
AWG13-AWG0 AWG13-AWG2
AWG4
AWG13-AWG0 AWG13-AWG2
that the requirements of both the cross-sectional
Honeywell
Terminal cable size
AWG17-
AWG10
AWG17-
AWG10
AWG17-
AWG10
AWG17-
AWG10
AWG17-
AWG10
AWG17-
AWG10
• 24
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