I have 2 and 3 wire #14 AWG , NMD 7, 90C, 300V wire in my home. To do
remodelling, I have 2 and 3 wire #14 AWG, NMD 90, 300V and I want to connect
it to the old wire. Can I connect NMD 7 to NMD 90? What's the difference?
I noticed the NMD 7 has the nylon strands inside.