🔌 How to Choose the Right Power Cable for Your Electrical Device?

Power cables directly affect the safety and stable operation of your devices. An incorrectly chosen cable can lead to voltage drops, overheating, or even fire. Below are simple selection rules + a link to the power cables category with available models.

1) Determine the device's power and the required conductor cross-section

Find the power (W) on the device's nameplate or in the manual. Based on this, select the conductor cross-section. Below are approximate values for household flexible cords 230 V~ (H05/H07, etc.). Always follow the manufacturer's requirements and safety standards.

Minimum cross-section, mm² Typical allowable current, A Approximate power at 230 V, W
0.50 ≈ 3 ≈ 700
0.75 ≈ 6 ≈ 1 380
1.00 ≈ 10 ≈ 2 300
1.50 ≈ 16 ≈ 3 700
2.50 ≈ 25 ≈ 5 700
4.00 ≈ 32 ≈ 7 400
6.00 ≈ 40 ≈ 9 200
10.00 ≈ 63 ≈ 14 500
16.00 ≈ 80 ≈ 18 400

Note: values are averaged. Selection is also affected by insulation type/class, temperature, installation conditions, cooling method, and plug/socket type. For high-power/critical systems, we recommend consulting an electrician.

2) Consider the cable length

The longer the 220–230 V power cable, the greater the voltage drop along the line. If the socket is far away — choose a larger cross-section or use a quality extension cord. Avoid “twists” and unnecessary adapters.

3) Choose the right IEC/Schuko connectors

  • IEC C13 → C14 — the most common pair for PCs, monitors, servers, and switches: the cable has female C13, the device has male C14.
  • IEC C19 → C20 — for high-power servers, UPS, and PDU; larger current and cross-section.
  • IEC C7/C8 (“figure-8”) — low-power devices (media players, power adapters).
  • IEC C5/C6 (“cloverleaf”) — laptops and compact power supplies.
  • Schuko CEE 7/7 — European plug with grounding for type F/E sockets.

For 19″ rack infrastructure, it is useful to have a PDU / 19″ power strip — convenient for powering multiple devices simultaneously and monitoring the load.

4) Safety and quality

  • Use grounded cords for devices with metal cases and/or high power.
  • Choose copper conductors, quality plastic/rubber insulation, and trusted brands.
  • Avoid bends, tension, and damage; overheated plugs/connectors are a reason for immediate replacement.
  • Do not exceed the rated capacity of the PDU/extension cord and the outlet itself.

Frequently Asked Questions (FAQ)

Which cable should I choose for a PC/monitor?

In 90% of cases — IEC C13–Schuko or IEC C13–C14, with a cross-section of at least 0.75–1.0 mm². For powerful workstations, 1.0–1.5 mm² is recommended.

Can I buy a longer cable “just in case”?

Yes, but with longer lengths, increase the cross-section to avoid voltage drop. Often, it is more practical to use a quality extension cord.

What is the difference between C19 and C13?

C19 is designed for higher currents and power (large servers, UPS, PDU). If your equipment has a C20 inlet — you need a cable with a C19 connector.

Where to buy a reliable power cable?

Go to our “Power Cables” section — you can filter by length, cross-section, connector type (C13/C14, C19/C20, Schuko, etc.), and manufacturer. Need advice? Contact us — we will help you choose the right solution for your device and load.