Advice on using Belkin surge protector with an 850W power supply.
Advice on using Belkin surge protector with an 850W power supply.
This appears to be an outdated British BS546 15A socket, reminiscent of my past. I still encounter these connectors while traveling across the Indian sub-continent, particularly in older hotel accommodations.
These resemble the smaller, now-discontinued British BS546 5A sockets.
Historically, BS546 round pins for 15A and 5A were phased out in the UK, except in specialized settings. The BS546 round pin was eventually superseded by the BS 1363 square pin fused plug, offering a variety of fuse ratings such as 2A, 3A, 5A, 7A, 10A, and 13A.
The IEC 60320 C14 connector found on many ATX power supplies is rated for 10A in the UK and countries with a standard 230V AC 50Hz supply. In the USA and other regions using 120V 60Hz, the rating increases to 16A.
The numbers 10A and 16A refer to the connector’s and cable’s maximum current capacity, not the actual power drawn by your ATX power supply.
For an 850W PSU operating at full capacity with 90% efficiency, I anticipate it could draw up to 944W continuously from the mains.
If your mains voltage is 240V AC, this would require approximately 3.93A, comfortably within the 6A capacity of the Belkin extension strip.
At 115V AC, the requirement jumps to about 7.87A, which exceeds the strip’s limit.
However, running a PSU at 100% output during normal operation is unrealistic. Assuming typical usage at 30%–50% of maximum, the Belkin strip would handle around 472W (including efficiency loss).
At 240V AC, this equates to roughly 1.96A, and at 120V it would be about 3.93A. Both values fit within the 6A rating.
You might notice that both 1.96A and 3.93A are within the capabilities of your 6A strip.
While a 16A version could handle additional loads, the 6A Belkin strip is adequate for an 850W ATX PSU under normal conditions—provided you keep the output below its maximum.
Keep in mind that most users don’t operate their PSUs at full power during regular tasks. Running it at 30%–50% of capacity is safe.
The only adapters needed are those for connecting the C14 connector on the PSU’s back to the wall outlet or a protective strip.
Don’t worry about 6A to 16A converters—they’re merely necessary for delivering power, not for reducing current.
CAUTION: If your mains supply is 120V 60Hz, exceeding the 6A rating could cause issues above 750W. In that case, opt for the 16A model. If your supply exceeds 200V 50Hz, you should be fine using an 850W PSU at full rating.
Remember, under typical usage, your computer won’t consume full power from an 850W unit. At idle, a typical usage might be around 100W, which translates to just over 0.4A at 240V AC.
This advice is based on careful calculations and real-world expectations.