![How to tell line and load wires when installing GFCI, dimmer/smart switch, or floor heating control - YouTube How to tell line and load wires when installing GFCI, dimmer/smart switch, or floor heating control - YouTube](https://i.ytimg.com/vi/SLvJtd4vtWE/maxresdefault.jpg)
How to tell line and load wires when installing GFCI, dimmer/smart switch, or floor heating control - YouTube
![Electrical wiring to indoor light switch -- two black hot wires or one line/load wire? - Home Improvement Stack Exchange Electrical wiring to indoor light switch -- two black hot wires or one line/load wire? - Home Improvement Stack Exchange](https://i.stack.imgur.com/m0LYb.jpg)
Electrical wiring to indoor light switch -- two black hot wires or one line/load wire? - Home Improvement Stack Exchange
If your line and load wires are the same color, how do you know which is which? How do you identify a load and line wire? - Quora
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How to Find Line and Load Wires and Install a Lutron Timer Switch MA- T51MN-WH Neutral Required - YouTube
![I can't figure out how to connect the existing wires in my kitchen light switch to the kasa smart switch. The upper black wire appears to be a common but it doesn't I can't figure out how to connect the existing wires in my kitchen light switch to the kasa smart switch. The upper black wire appears to be a common but it doesn't](https://preview.redd.it/lq2dghry9bj61.jpg?width=3024&format=pjpg&auto=webp&s=43b4d9286a979f8fb3107b49c03e3347fb9cc1ee)
I can't figure out how to connect the existing wires in my kitchen light switch to the kasa smart switch. The upper black wire appears to be a common but it doesn't
![Simple wiring question - pls help identify line, load and ground. This is a Legrand TM870. Trying to install my KASA smart switch. : r/TPLinkKasa Simple wiring question - pls help identify line, load and ground. This is a Legrand TM870. Trying to install my KASA smart switch. : r/TPLinkKasa](https://i.redd.it/zdjdnx5djlk61.jpg)
Simple wiring question - pls help identify line, load and ground. This is a Legrand TM870. Trying to install my KASA smart switch. : r/TPLinkKasa
![4-way switch wiring help - line and load in same box - Devices & Integrations - SmartThings Community 4-way switch wiring help - line and load in same box - Devices & Integrations - SmartThings Community](https://global.discourse-cdn.com/smartthings/original/3X/b/1/b1ccfcfa661298e624779b9f6b3d8c66cac7dc8d.jpg)