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There appear to be a lot of furry wires, 1 black, 1 white wire, and no ground. How do I go about wiring this up to a standard switch? And which remaining wires should I cap together?

enter image description here

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  • If you saw food that furry, would you eat it? Seriously, Is the wiring in this house safe?
    – nigel222
    Jan 28 at 9:43

2 Answers 2

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Referring to the image below:

  1. Carefully tuck these back into the box
  2. Carefully tuck these back into the box
  3. Connect this to one screw on the new switch
    1. Remove the wire nut
    2. Bend a hook into the the wire coming from the wall*
    3. Put the hook around a screw on the replacement switch, making sure that the hook goes around the screw clockwise
    4. Tighten the screw, making sure the wire stays under the screw
  4. Connect this to the other screw on the new switch. Follow the same procedure as in step 3.

labeled version of the original picture
Click to embiggen

Note that grounding is good. It isn't required on switches. The NEC (from 2017, I believe) allows you to add a separate grounding wire to an existing circuit, however doing so is a whole different ball game. Also, it's not required to add it when doing simple fixes like replacing a switch.


*Even better would be to spend an extra dollar or so on a "commercial grade" switch that has side clamps. There is no need to bend a hook in the wire - just stick it straight under the clamp and screw it down. Usually, these will allow you to put two wires under the same clamp (one on each side). You can not put 2 wires under a standard screw fitting.

This would allow you to modify these instructions by removing the wire nut at #1 and attach the two wires that go back into the box under one side clamp. The other pig-tail of wire and its nut would go with the old switch into your spares drawer. (TBH, you should get rid of that bit of wire, it's looking rather... ragged.) You would also eliminate step #4 from the above.

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  • 1
    thanks, I was able to replace the light without burning my house down!
    – rugbert
    Jan 27 at 18:43
  • Whew! I'm glad to hear that @rugbert, and congrats!
    – FreeMan
    Jan 27 at 18:45
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You're correct, that is a mess of wires and it's anyone's guess where all those go to at this point. But, to wire a new switch in it needs to go here:

Wiring

Remove those two wire nuts and place the new switch at those points.

It's not really a part of what you asked but that insulation looks quite old and deteriorating. You may want to consider bringing in a qualified electrician to evaluate what you have going on here.

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    That left arrow points to a wire nut with 3 wires in it. One goes away with the new switch, but the other two would both need to be connected to the new switch.
    – FreeMan
    Jan 27 at 17:13
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    I didn't notice that 2nd wire the first time. As noted, it's a mess!
    – jwh20
    Jan 27 at 17:18

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