UPS manufactures cutting corners

[Phil2008]

I have a 1800watt/2000VA Online UPS and was quite shocked to find that all 4 outlet sockets are using the same 3 wires and not using individual wires for each socket. So spreading out the load over the 4 sockets is pointless.

 

[Armageus]

Why would that be a problem?

The multiple sockets on the back of a UPS are purely to plug in multiple devices (essentially just a built in power strip), but you still can't exceed the total Watt/VA limit.

1800Watts is less that 8 Amps - even 1mm cable cross section cable would be fine, but likely it will be 1.5mm or even 2.5mm.