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Question DetailsAsked on 11/12/2017

I plugged my coffee brewer to an outlet adapter with switch and my wire got hot & melted. which of the 2 are faulty

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1 Answer


The wire that melted is almost certainly at fault - unless the adapter got very hot and melted the wire right at the adapter, because the adapter could not allow more current to flow through than the connected load - it cannot increase the load on downstream connected items.

So the coffee maker could not (lacking a direct short somewhere) draw more current than usual because of the switch mechanism, though it could potentially (if underrated) reduce the current (power) the coffee maker produced - in which case the adapter would almost certainly burn out, or trip out any internal breaker. And the adapter could potentially add a bit of load to the household circuit it is connected to - so if the coffee maker was close to the capacity of that circuit it could trip the breaker on the circuit.

Household countertop appliances are generally provided with very marginally sized cords - really not safe in many cases in my opinion, so it is not surprising it burned out. Also check at Consumer Product Safety Commission website ( about any recalls on that device, and unless the cord had been physically damaged report it as a safety issue. Many countertop high-load appliances like toasters, microwaves, coffee makers, etc can overheat and melt the cord even just by having it loop over itself, making a hot spot in the cord. Also frequently fail at the plug and appliance ends because the flexing of the cord breaks some of the fine wires in the cord, causing local overheating.

Answered 3 years ago by LCD

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