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The construction is generally as you describe, but you should not guess at the gauge of the wire or the total length - it is mainly the resistance thar limits the current, not the inductance. It WILL get warm and eventually hot after only a little while. Commercial units usually have a "hold to operate" switch. We had one with a shorted switch once, and it's a good thing it was lying on a fireproof bench. Of course, if there's no switch, you would turn it off by unplugging, which you are unlikely to forget (I hope!). So, if you find the article and follow the numbers, it should work fine.
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