![]() The one thing I did not do was to strip the wires long and pretwist the set of wires to be connected, then cut off the twisted bundle to the correct length for the wire nut. When I pigtailed our 1970 house in 1980 I generally followed the procedures of electrical engineer Jesse Aronstein formulated in collaboration with for pigtailing aluminum house wiring. I use emery cloth with Penetrox on the cloth to abrade each aluminum wire before inserting the set of wires into the wire nut. If I have four or more wires to connect, I have used a good quality gray wire nut (Scotchlok is what I have used preferentially) preloaded with Penetrox. I usually use two port AlumiConns when I have only two wires, but sometimes use three port AlumiConns and leave one port open for future splicing. AFIK three port AlumiConns only allow up to three wires, one wire in each port. Purple wire nuts are not recommended by experts. So in pigtailing or extending aluminum wired circuits 14 AWG copper can be connected to 12 AWG aluminum and 12 AWG copper to 10 AWG aluminum. In houses wired in aluminum 10/2 is used for 20 A circuits. Can I continue my project or would I be better served to head to the store and grab some 12/2?ฤก2/2 aluminum is rated for 15 A only. I want to continue doing this to all the other rooms but looking for validation that what I'm doing is safe for the long term. I have attached a picture of my breaker showing 12/2, 2 examples of junction boxes in my attic using 12/2 and 14/2 splices, and the 4 LED's in which I have already installed. I added a junction box in the attic and spliced the 12/2 with 14/2 using al/cu connections and ran the 14/2 to the outlet for constant power and from the switch to the 4 LEDs. My breaker box is in the garage and the room I'm working on is the farthest room on the 2nd floor. I believe the reason 12/2 was used is because it is a significantly long run. In the picture you'll see almost all 12/2 out of the breaker box even with various 15 amp breakers. The supply to the switch was 12/2 even though the breaker is 15 amp. ![]() I was able to find the power leading into the switch from my attic and cut it. I decided to change from 1 switched outlet with a lamp in each room to the switch controlling 4-6 LEDs. I am renovating the 2nd floor of my 1970's home. ![]()
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