I install a mosfet on my 3D printer to help safely regulate the power from the power supply. \r
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mosfet: \r
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If that link doesnt work, just search up Ebay or Aliexpress.com. They are all over the place for anywhere between $8.00-$15.00 depending on seller, shipping, etc.\r
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Use a good size wire from the power supplies and bed. I would say 14 gauge minimum, 12 gauge even better. \r
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The crimps I used are for 14 gauge and just barely fit the opening under the screw.\r
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It continues to work fine as I demonstrated, but you can find more information here: \r
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Im not an electrician. Do your research!