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Old switch has a loop wrapped around screw. [red wire on brass screw]

enter image description here New dimmer has 4 wires (no screws to wrap around). How do I connect red wire (looped) to new black wire? Do I cut red wire and use larger wire nut for 3 wires?

enter image description here

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  • Can you confirm the red on the switch is the hot supply? On dimmers the red(s) are switched, and the black gets the hot. Regardless, to connect a looped wire with one from the dimmer, yes, you unscrew and then cut the loop open, add the other wire, twist them together and cap it with a nut.
    – P2000
    Sep 19 at 17:51
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    Are you aware that you are replacing a 3-way switch? Have you identified the travelers vs. the common? Sep 19 at 18:00
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    To P2000 - Yes the red is confirmed to be hot on old original switch (first picture). I will cut red hot loop and connect to black on the dimmer. Great - this worked. Thank you To Harper - Yes I am aware this is 3 way switch (I included this in title of question). I have confirmed hot vs travelers.
    – Cheryl H
    Sep 19 at 19:19
  • @CherylH Actually, you included that you had a new three way dimmer switch, not that the existing switch was a three way. Many new dimmers can handle both three way and single switches but are wired differently which was what Harper was getting at. :-)
    – JACK
    Sep 19 at 20:38
  • @P2000 You should type this up as an answer since it solved the OP's question. Hopefully, they will check mark it as selected.
    – JACK
    Sep 19 at 20:41
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To connect a looped wire with one from the dimmer, yes, you unscrew and then cut the loop open, add the wire from the dimmer, twist them together, and cap it with a nut.

Just be sure: confirm that the red on the switch is indeed the hot supply and not a traveler or common. On dimmers the red(s) are switched, and the black gets the hot.

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