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2.
Installation and wiring
2.2 Wiring the CTs (continued)
Using KM-NCT-E
@@@
A
The wiring method when using the KM-NCT-E
@@@
A, a dedicated CT for 1A output, is as follows.
• For wiring of the output terminal of CT, use AWG18-14 electric wire (with a cross-section of 0.75-2.0mm
2
) and Y-
shape terminal compatible with the M3 screw.
• The recommended torque for screwing the M3 screws onto the output terminal is 0.3 N·m. Make sure the Y
terminal is pushed all the way in and tightened firmly. After fixing the wiring, confirm that the wire is fixed securely.
• The guideline of the maximum wiring length between the main unit and CT is as follows.
• The limit of the wiring length can also be calculated by the following formula. Calculate the wiring length limit
according to the conductor resistivity of the wiring and keep the wiring length below the limit.
• The limits of the wiring length as shown on the table and expression below are for reference only. They do not
guarantee proper use. They do not guarantee proper use.
Wiring diameter
Guideline for wiring length limit
0.75 mm
2
(AWG18 equivalent)
15m
2.0 mm
2
(AWG14 equivalent)
43m
Wiring extension limit value (one-way) (m) = 0.475/conductor resistivity (
Ω
/m)