RS232 cable (wiring for Crossed / Straight)

There are two typical RS232 cables used in the industrial.

  • Crossed RS232 cable
  • Straight RS232 cable

Cross Cable RS232 wiring

Cross cable wiring for RS232 usually happens between two DCE (data communication equipment) devices, or two DTE (Data Terminal Equipment) devices.

RS232 Cross Cable wiring

Straight Cable RS232 wiring

RS232 Straight Cable wiring
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Cable Wire Size and Current Capacity Rating Guide

This is a general cable wire size guide to help you choose the correct wire size for your electrical project.

Choosing a thicker wire provides higher current carrying capacity. It is safer to use thicker wire to conduct the current, but thicker wire is going to cost more. This guides provides you a gauge to select the most appropriate cable size.

*** Important Notes: The variety of cable brands varies in quality. The cable conducting and insulation jacket material do have an impact of the amount of ampere current that a wire can conduct. The cable length and temperature of the conducting environment also plays a part. The following wire size and current is only an estimate for a quick reference guide when selecting your cable size. It is important to check on the datasheet of the cable directly from the manufacturer.

Wire Size and Current Rating Table Guide

Projected Maximum
Operating Current
Wire Size
(AWG)
Copper Wire
Diameter Ø
Cross-sectional
Area
Current Capacity
0.1A
0.3A
0.5A30AWG
Wire Wrapping wire
0.3mm0.05mm20.8A
1A28AWG0.36mm0.08mm21.25A
2A27AWG
3A26AWG0.46mm0.14mm23.5A
5A24AWG
CAT5e Network Cable
0.61mm0.2mm25A
22AWG0.78mm0.33mm28.73A
10A21AWG
20AWG0.92mm0.5mm213.87A
25A17AWG1.34mm1.06mm229.2A
16AWG1.31mm2 (closest 1.5mm2)
50A14AWG
Electrical Wire
1.78mm2.07mm2 (closest 2.5mm2)55.6A
12AWG
Electrical Wire
about 4mm2
10AWG
Electrical Wire
about 6mm2

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