Adding a third conductor (signal, neutral, or to identify a separate circuit) to a project that already uses red and black for positive/negative.
18AWG
White
Single color
What is it and what's it for?
It's the same flexible, heat-resistant silicone wire you already know from this ranking, same 18AWG gauge, but in white — it's not power or a negative, it's meant as a third wire for signal, neutral, or to tell one circuit apart from the others.
Real-world use cases
At home
A home automation project where red and black are already used as positive and negative, and you need a third wire for a control signal or sensor.
In a business or workshop
A panel with several 18AWG circuits can use white to visually identify a signal circuit apart from the power ones (usually red/black), making future maintenance easier.
How to avoid buying the wrong one
Comes in a single color (white) — it doesn't replace red or black, it's an additional color to add to what you already have.
Same gauge (18AWG) as the red version in this ranking — not for power loads, for that the 14AWG wire in this same batch is the right choice.
Gives 50 feet — a smaller spool than the thicker gauges, meant for small signal projects.
The investment takeaway
Having a third color available avoids the classic "was this white wire the sensor or the neutral?" question months after the project's built — for future maintenance, color-coding circuits saves far more time than the wire costs.
Supports all three serial standards (RS232/485/422) on one device, so it works for both old instruments with an RS232 port and multi-device RS485 buses. PoE power is a real plus in installations where there's no outlet near the panel — a single Ethernet cable carries both data and power. Confirm whether your Modbus master needs TCP Server or Client mode before buying; the mode is set in software, it doesn't come fixed from the factory.
Single-phase input to 220V three-phase output — the typical choice for workshops without a three-phase feed that want to run a 3-phase motor. This is an entry-level model (2HP/1.5kW), meant for spindles and small CNC motors, not large industrial loads. The output range up to 3000Hz is only useful if your specific spindle takes advantage of it — for a standard 60Hz motor it's irrelevant.
Has vector control (not just scalar V/F), which holds torque better at low RPM — important if you'll be threading or cutting at reduced speed. At 5HP/4kW it covers larger motors than the entry-level model, and accepts both single-phase and three-phase input, giving flexibility depending on the electrical setup available. Rated up to 26A — confirm your wiring and breakers can handle that current before installing.
