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P
OWER CABLING
4.1.1.1
Cable and fuse sizes, frames MR4 to MR6
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—230 P75
400 1P1—400 1P5
230 1P1—230 1P5
MR4
400 2P2—400 3P0
230 2P2—230 3P0
400 4P0—400 5P5
230 4P0
400 7P5
230 5P5
MR5
400 11P
230 7P5
400 15P
400 18P
230 11P
MR6
400 22P
230 15P
400 30P
The cable dimensioning is based on the criteria of the International Standard IEC60364-5-52: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 chapter Earthing and earth
fault protection of the standard.
For the correction factors for each temperature, see International Standard IEC60364-5-52.
Fuse
I
L
(gG/gL)
[A]
[A]
3.7—4.8
6
3.4—4.8
6.6—8.0
10
5.6—8.0
11—12.5
16
9.6—12.0
18.0
20
16.0
24.0
25
23.0
31.0
32
38.0
40
48.0
50
46.0
62.0
63
61.0
Table 14. Cable and fuse sizes (MR4 to MR6)
NOTE HOWEVER
Mains and
motor cable
2
Cu [mm
]
1—6 solid
3*1.5+1.5
1—4 stranded
1—6 solid
3*1.5+1.5
1—4 stranded
1—6 solid
3*2.5+2.5
1—4 stranded
3*6+6
1—10 Cu
3*6+6
1—10 Cu
3*10+10
1—10 Cu
3*10+10
2.5—50 Cu/Al 2.5—35
3*16+16 (Cu)
2.5—50 Cu/Al 2.5—35
3*25+16 (Al)
3*25+16 (Cu)
2.5—50 Cu/Al 2.5—35
3*35+10 (Al)
that the requirements of both the cross-sectional
Honeywell
Terminal cable size
Main
Earth
terminal
terminal
2
[mm
]
[mm
1—6
1—6
1—6
1—10
1—10
1—10
• 22
2
]
4
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