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Part 5: Review on Replacement of MR-J2S-30 kW or Higher Capacity Models with MR-J4-DU_
(2) Fabrication of a protection coordination cable
Fabricate a cable according to the internal wiring diagram of the section (1) using an MR-J2CN1-A
connector set and recommended wires shown below.
Model
MR-J3CDL05M
Note 1. d is as shown below.
Conductor
2. This is the standard outside diameter. Although no tolerance is described, the diameter can be up to 10% larger than
shown in the table.
5.2 Wire Selection Example
Core
Length
Number
size
[m]
of cores
[mm
2
]
20
0.5
0.08
(10 pairs)
d
Insulator
POINT
For wiring to comply with the IEC/EN/UL/CSA standard, refer to "MR-CV_/MR-
CR55K_/MR-J4-DU_(-RJ) Instruction Manual". To comply with other standards,
use wires compliant with each standard.
Selection conditions of wire size is as follows.
Wiring condition: In-air, one-row wiring
Wiring length: 30 m or lower (MR-J2S series)
50 m or lower (MR-J4 series)
POINT
If using the existing cables, refer to "[Appendix 2] Introduction to Renewal Tool".
Characteristics of a core
insulator
outer
Conductor
diameter
Configuration
resistance
insulator
[wires/mm]
[Ω/km]
OD d
[mm]
(Note 1)
222
7/0.127
0.38
or less
5 - 33
Cable
OD
Cable
outer
Recommended wire type
diameter
[mm]
(Note 2)
UL 20276 AWG#28 10 pair
6.1
(cream)
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