Does cable awg/amp matter for power adapter?

[jburgess328]

I have a power adapter to a tablet that says it takes an input of 1A, and a 22 awg cable that goes from the wall outlet to the adapter that says 2.5A on it. My question is, does any of this matter? Or is it ok to plug any cable into the adapter as long as it fits?

 

[Karsten75]

Do you know what an old-fashioned fuse consisted of? Just a bit of thin wire.

Can you recall from your schooling the formula for Volts, Watts and Amperage? The current I in amps (A) is equal to the power P in watts (W), divided by the voltage V in volts (V)

If you run a current on too thin a cable, the cable offers impedance (resistance) to the current, causing some of the current to turn into heat, thus diminishing the effective current delivered to the endpoint.

It's up to you if any of that matters to you or if you think the manufacturer was just blowing smoke up your keester to specify requirements.

 

[Mr Hollywood]

It is personal preference. The awg is the cable thickness and amp is the power conversion. If your a spec nerd look into it but if not go forward by plugging it in.

 

[jburgess328]

Do you know what an old-fashioned fuse consisted of? Just a bit of thin wire.

Can you recall from your schooling the formula for Volts, Watts and Amperage? The current I in amps (A) is equal to the power P in watts (W), divided by the voltage V in volts (V)

If you run a current on too thin a cable, the cable offers impedance (resistance) to the current, causing some of the current to turn into heat, thus diminishing the effective current delivered to the endpoint.

It's up to you if any of that matters to you or if you think the manufacturer was just blowing smoke up your keester to specify requirements.

Yeah, I know about that but in this case the cable says 2.5A, and the input on the power adapter says 1A! I was wondering if it mattered if the cable can supply more amps than what the input says on the power adapter. I am guessing that it doesn't but I wanted to make sure before I risk damaging my tablet. BTW the power adapters output says 2.56A.

 

[Karsten75]

yea, you can deliver higher amps at lower volts.

 

[jburgess328]

yea, you can deliver higher amps at lower volts.

I believe the wall outlet is what, 100-120v, or something? The cable says 2.5A 250v, power adapter input says 1A 100-240v, and the output says 12v 2.58A, 5v 1A.