When you need a power strip that reaches far from the wall (home theater, office desks, workshops, or conference rooms), a long extension cable is convenient — but it introduces extra considerations. Below I’ll give an engineer’s perspective and a practical checklist so you choose a safe, reliable, and high-performing USB power strip for long-run use.

1) Start with a clear use case and required reach

Measure where the strip will sit and where the outlet is. “Long” can mean very different things depending on context:

Short runs (≤ 3 m / 10 ft): almost any good strip is fine.

Medium runs (3–6 m / 10–20 ft): choose thicker cable gauge and good strain relief.

Long runs (> 6 m / 20 ft): prioritize heavier gauge wire, robust surge protection, and consider placement to minimize voltage drop and heat.

Always measure cable route (along floor, behind furniture, through conduits) — not a straight line — so you buy sufficient length.

2) Cable electrical capacity — gauge and current rating matter

The longer the cable, the more important the conductor size (wire gauge) becomes:

Choose a power strip whose extension cord is rated for the maximum current you expect (e.g., 10 A, 13 A, 15 A depending on region and load).

For runs beyond a few meters prefer thicker conductors (lower AWG number). Thicker wire reduces voltage drop and heating. If you’ll be powering many devices or high-draw equipment, opt for 14 AWG or 16 AWG rather than 18 AWG.

Check the manufacturer’s rated amperage for the cord and the strip’s total load rating — the cord and strip must both support the maximum load.

3) Total power budget and USB port design

USB ports are the main reason people choose USB power strips — understand power distribution:

Look for specification of per-port current (e.g., 2.4 A for USB-A, 3 A+ for USB-C) and total simultaneous output (e.g., 100 W aggregate for PD ports). The strip should state whether ports share power or have independent supplies.

If you plan to charge laptops or tablets, choose a strip with USB-C PD ports that support higher wattages (45 W–100 W) and clear per-port limits.

Avoid strips that advertise high per-port numbers but do not state aggregate limits — that’s where real-world performance falls short.

4) Safety features: non-negotiable

Long cables and multiple devices raise risks. Prioritize these safety elements:

  • Surge protection with a joule rating (higher is better). For long runs in areas prone to spikes, choose a robust protector.
  • Overcurrent protection / circuit breaker (resettable) and thermal cutoff to prevent fires from overheating.
  • Grounding (3-prong plug) — indispensable if you’ll power metal-chassis equipment.
  • Fire-retardant housing (look for V-0 / flame-retardant materials or manufacturer testing statements).
  • Child safety shutters if used in family areas.
  • Certifications: choose products with recognized safety marks relevant to your country/region (e.g., UL/ETL in North America, CE and EN standards in Europe). These indicate independent testing.

5) Build quality and cable construction

A long cable must survive handling and routing:

  • Strain relief where the cord meets the strip and the plug — prevents early failure.
  • Braided or oil-resistant jackets are more durable for floor use or workshops.
  • Right-angle or rotating plug options reduce stress behind furniture.
  • Rigidity vs flexibility: thick gauge is less flexible; ensure the cord’s bend radius suits your installation.

6) Outlet layout and spacing

If you’ll use bulky wall warts or power adapters, pick a strip with:

  • Generous spacing between AC outlets or rotating outlets.
  • A mix of AC outlets and USB ports positioned so large adapters don’t block USB ports.

7) EMI/RFI filtering and noise considerations

If you’re powering audio/video equipment, look for strips with EMI/RFI filters and low noise ratings. Long cables can be pickup antennas; good filtering helps prevent hum and interference.

8) Practical features that improve experience

These don’t replace safety but make the product more usable:

  • Indicator LEDs for power/ground/surge status.
  • Individual switches for outlet banks.
  • Mounting slots if you plan to fix the strip under a desk or on a wall.
  • Detachable/replacable cable option — useful if the cord wears or different lengths are needed.

9) Installation tips for long runs

Avoid running long extension cables under rugs (heat build-up) or in tight bundles with other power cords.

Secure the cable with clips; avoid sharp bends.

If voltage drop is a concern for sensitive equipment, place the strip closer to the outlet and route shorter USB/data cables to devices.

10) Buying checklist (quick)

Before you buy, confirm:

  • Required cable length and measured route.
  • Cord gauge and amp rating appropriate for expected load.
  • Total strip load rating and aggregate USB output.
  • USB-C PD wattage per port and aggregate.
  • Surge protection and resettable breaker present.
  • Grounded plug and regional safety certifications.
  • Durable cable jacket and good strain relief.
  • Outlet spacing, mounting options, and indicators.
  • Warranty and manufacturer support.

Final note

A long-cable USB power strip is very convenient but can introduce additional electrical and mechanical stress. Prioritize rated current capacity, thicker cord gauge, robust surge and thermal protection, and verified safety certifications. Match the USB power capabilities (PD wattage, per-port and aggregate limits) to the devices you intend to charge. With those criteria in place you’ll get a reliable, safe solution that keeps your devices powered without surprises.

I recommend a good USB power strip with a long extension cable.

European Style 5Ft Wiring Board with USB and Type-C Power Socket EU Style with Wire Strip