Can I Use a 5A-250V rated extension cord to plug in my gaming pc?

[manthangupta41]

I have Budget Gaming PC with specs listed as below
i5 7400 @3.30Ghz(Turbo)
Zotac GeForce GTX 1050 Ti OC Edition
8GB DDR4 (Single Channel) Vengence LPX
Corsair VS450 Plus 80(Not Modular)
Gigabyte h110m-s2 Motherboard
Intel Stcok Cooler XD
Seagate Bracuda 1Tb 7400rpm
Monitor -Acer KG271 27inch

My total power drawn is 367W according to https://outervision.com/power-supply-calculator


so will it be safe to use a extension cord of 5A-250V for this pc?
according to my calculation W=I*V ie,1250W and using 450W PC wont hurt it??

 

[RememberThe5th]

If its not the "chinese one" I wouldnt worry.
Also the psus have power loss, as heat, which is typically (Thats why it says 80+ gold bronze , fyi).