P
OWER
CABLING
Honeywell
• 22
4
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.
Table 14. Cable and fuse sizes (MR4 to MR6)
The cable dimensioning is based on the criteria of the International Standard IEC60364-5-52:Cables
must be PVC-isolated; Max ambient tempe30°C, max temperature of cable s70°C; Use
only cables with concentric copper shield; Max number of parallel cables is 9.
When using cables in parallel,
NOTE HOWEVER
that the requirements of both the cross-sectional
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.
Frame
Type
I
L
[A]
Fuse
(gG/gL)
[A]
Mains and
motor cable
Cu [mm
2
]
Terminal cable size
Main
terminal
[mm
2
]
Earth
terminal
[mm
2
]
MR4
230 P55—230 P75
400 1P1—400 1P5
3.7—4.8
3.4—4.8
6
3*1.5+1.5
1—6 solid
1—4 stranded
1—6
230 1P1—230 1P5
400 2P2—400 3P0
6.6—8.0
5.6—8.0
10
3*1.5+1.5
1—6 solid
1—4 stranded
1—6
230 2P2—230 3P0
400 4P0—400 5P5
11—12.5
9.6—12.0
16
3*2.5+2.5
1—6 solid
1—4 stranded
1—6
MR5
230 4P0
400 7P5
18.0
16.0
20
3*6+6
1—10 Cu
1—10
230 5P5
400 11P
24.0
23.0
25
3*6+6
1—10 Cu
1—10
230 7P5
400 15P
31.0
32
3*10+10
1—10 Cu
1—10
MR6
400 18P
38.0
40
3*10+10
2.5—50 Cu/Al 2.5—35
230 11P
400 22P
48.0
46.0
50
3*16+16 (Cu)
3*25+16 (Al)
2.5—50 Cu/Al 2.5—35
230 15P
400 30P
62.0
61.0
63
3*25+16 (Cu)
3*35+10 (Al)
2.5—50 Cu/Al 2.5—35
