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Why do i need Japanese stepdown not a USA stepdown transformer?

Many people online say you can use American stepdown transformers with Japanese equipment but this is not correct and dangerous!

Most Japanese equipment runs at 100v and by using on a 110v stepdown over time it will over volt and ultimately damage Japanese appliances.

Here's why:

The normal voltage in Australia is 240v (+or -) 6% as supplied by the utilties.

So the maximum voltage  legally that can be supplied can be 254.4v

Now 254.4v into a 240/110v transformer will give 116.6v  or even higher.(if the transformer is not fully loaded)

This is 16.6% increase over the norminal voltage of 100v,. This voltage will damage the 100v equipment.

THE INPUT VOLTAGE WILL BE TOO HIGH FOR THE JAPANESE EQUIPMENT.