![wiring - In a light switch, how can I tell if the black wire is really hot and the white wire is really neutral? - Home Improvement Stack Exchange wiring - In a light switch, how can I tell if the black wire is really hot and the white wire is really neutral? - Home Improvement Stack Exchange](https://i.stack.imgur.com/AC3wn.jpg)
wiring - In a light switch, how can I tell if the black wire is really hot and the white wire is really neutral? - Home Improvement Stack Exchange
![Amazon.com: 4 in 1 Hot Wire Styrofoam Cutter (Black-24W) Hot Wire Foam Cutting Kit, Electric Carving Tool Transformer Adaptor : Arts, Crafts & Sewing Amazon.com: 4 in 1 Hot Wire Styrofoam Cutter (Black-24W) Hot Wire Foam Cutting Kit, Electric Carving Tool Transformer Adaptor : Arts, Crafts & Sewing](https://m.media-amazon.com/images/I/61wtbSbR3sL.jpg)
Amazon.com: 4 in 1 Hot Wire Styrofoam Cutter (Black-24W) Hot Wire Foam Cutting Kit, Electric Carving Tool Transformer Adaptor : Arts, Crafts & Sewing
![electrical - Black and white wires coming out of wall are both hot - Home Improvement Stack Exchange electrical - Black and white wires coming out of wall are both hot - Home Improvement Stack Exchange](https://i.stack.imgur.com/2tExQ.jpg)
electrical - Black and white wires coming out of wall are both hot - Home Improvement Stack Exchange
![Which of these wires, black or red, is my hot wire? Both screws are brass. Also why is the white wire in the back unconnected? : r/askanelectrician Which of these wires, black or red, is my hot wire? Both screws are brass. Also why is the white wire in the back unconnected? : r/askanelectrician](https://external-preview.redd.it/g46p-DZ6gBYTwWEMcatSf0j84edDkvpxUXE87ew7mUs.jpg?auto=webp&s=f6bf5281957f798236635113ddb612aa4cea9500)