How to Choose the Right Power Strip & Extension Lead
Selecting the correct power extension goes beyond counting the sockets. To ensure electrical safety and device longevity, consider these technical specifications before purchasing:
| Feature / Type | Best Use Case | Technical Benefit |
|---|---|---|
| Individually Switched | Home theaters, PC setups, kitchen appliances | Allows power cut-off to specific devices, preventing phantom load and enhancing safety. |
| Surge Protection | Expensive electronics (PCs, Smart TVs, NAS) | Absorbs voltage spikes to prevent motherboard or component burnout during electrical surges. |
| Integrated USB Ports | Office desks, bedside tables | Frees up 13A sockets by directly charging mobile devices without bulky adapters. |
Important Note (Safety Limitation): Never "daisy-chain" (plugging one power strip into another) to extend reach. This can easily overload the wall socket's 13A limit, leading to overheating and fire hazards. Additionally, the built-in USB ports on standard extension leads are designed for 5V mobile charging; they cannot power high-wattage laptops unless explicitly rated for USB-C PD (Power Delivery).
Frequently Asked Questions (FAQ)
Q: What does "13A" mean on a UK extension lead?
A: 13 Amps (13A) is the maximum total current the extension lead can safely handle across all its sockets combined. In Hong Kong (220V), this equates to roughly 2860 Watts. Plugging in multiple high-draw appliances like space heaters or kettles simultaneously can trip the built-in fuse.
Q: Are extension leads with longer cables (e.g., 5 meters) safe?
A: Yes, provided the internal copper wire gauge is thick enough. However, you must fully uncoil the cable during use. Keeping a long power cable coiled while drawing high current can cause electromagnetic induction and severe overheating.