4. Wiring
25
9. Closed-loop connectors should be used when wiring to the main cir-
cuit terminals.
10.Voltage drop should be considered when determining the wire size.
Voltage drop can be calculated using the following equation:
Phase-to-phase voltage drop (V)
= × wire resistance (Ω/km) × wiring distance (m) × current
(A) × 10
-3
Select a wire size so that voltage drop will be less than 2% of the
normal rated voltage.
Wire and Terminal Screw Sizes
1. Control Circuits
Model Terminal
Symbols
Screws Tightening
Tor que
Nxm
Wires
Applicable Size Recom-
mended Size
Type
mm
2
AWG
mm
2
AWG
Common
to all
models
MA, MB, MC M3 0.5 to 0.6 Twisted wires:
0.5 to 1.25,
Single:
0.5 to 1.25
20 to 16,
20 to 16
0.75 18 Shielded
or equiv-
alent
S1 to S5,
SC, FS, FR,
FC, AM, AC
M2 0.22 to 0.25 Twisted wires:
0.5 to 0.75,
Single:
0.5 to 1.25
20 to 18,
20 to 16
0.75 18
3
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