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If you are selling these units can you be sued? Do you have liability insurance? NO and NO will be the answer.

There is a reason I buy UL listed items from digikey that are sourced from American, Japanese, or European companies. SAFETY. Beyond safety if its not UL listed (and many Chinese products have fake stamps) you might not get paid from your insurance company when/if it burns down).

I am not your parent. If you want to play Russian roulette with your life go ahead.

$67 might be a quarter the cost of a Chinese printer. Anets and Tevo's have fire issues as well. A good power supply might cost another $60 (which mine does) because its grounded. The whole printer frame has been tested to ground. The connectors I use are UL rated and have spec sheets to voltage and amperage.

Fotek SSR dangers

Spectacular SSR Failure (Fire)

Big Clive Tear Down (unit not rated to amperage)

Load always on during failure (when wired to wrong polarity)

Hard Short to Ground (very dangerous)