Why input amperage mentioned on a device's nameplate but not output amperage ?

[munzir]

Why input amperage mentioned on a device's nameplate but not output amperage ?

 

[schmitt trigger]

???
This question is very ambiguous.
Is the "device" a power supply? Or an audio amplifier? or something else?

 

[FANT]

Because before connecting the device to the mains, you should verify that the socket will whinstand the current required by the device.

If the device is a power supply, this is made in low voltage and so it is not so dangerous.

Overall the input power of the device is regulated by international rules, but the output is regulated by nobody ( free choice ).

Mandi

 

[munzir]

On UPS nameplate / specifications ..........

 

[Kuberkoos]

Because before connecting the device to the mains, you should verify that the socket will whinstand the current required by the device.

If the device is a power supply, this is made in low voltage and so it is not so dangerous.

Overall the input power of the device is regulated by international rules, but the output is regulated by nobody ( free choice ).

Mandi

The nameplate amperage is the maximum the device will draw from the power outlet - immaterial of what the output is. Thus if your output socket can supply the nameplate current, you are ok. Your output current will (In the case of a power supply) be (Iin x Vin / Vout) x Efficiency (anywhere between 99% and as low as 45%). As long as you do not grossly overload the device, the nameplate current will be the max that you draw from the supply.
Does this help?