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3-19
H Wire Sizes and Allowable Current
The following table shows the allowable current for when there are three wires.
D 600-V Heat-resistant Vinyl Wiring (HIV) (Reference Values)
AWG size Nominal cross-
sectional area
Configuration
(wires/mm
2
)
Conductive
resistance
Allowable current (A) for
ambient temperature
(mm
2
) (Ω/km)
30°C 40°C 50°C
20 0.5 19/0.18 39.5 6.6 5.6 4.5
– 0.75 30/0.18 26.0 8.8 7.0 5.5
18 0.9 37/0.18 24.4 9.0 7.7 6.0
16 1.25 50/0.18 15.6 12.0 11.0 8.5
14 2.0 7/0.6 9.53 23 20 16
12 3.5 7/0.8 5.41 33 29 24
10 5.5 7/1.0 3.47 43 38 31
8 8.0 7/1.2 2.41 55 49 40
6 14.0 7/1.6 1.35 79 70 57
4 22.0 7/2.0 0.849 99 88 70
H Terminal Block Wiring Procedure
Connector-type Terminal Blocks are used for Servo Drivers of 1.5 W or less (R88D-WTA3Hj to
R88D-WT15H). The procedure for wiring these Terminal Blocks is explained below.
Connector-type
Terminal Block
(Example: R88D-WT01H)
1. Remove the Terminal Block from the Servo Driver.
Caution The Terminal Block must be removed from the Servo Driver before being wired. The
Servo Driver will be damaged if the wiring is done with the Terminal Block in place.
2. Strip the covering off the ends of the wires.
Prepare wires of the right sizes, according to the tables provided under Terminal Block Wire Sizes
above, and strip off 8 or 9 mm of the covering from the end of each wire.
8 to 9 mm
System Design and Installation
Chapter 3
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