I'm replacing a feed-through switch on an IKEA (Canada) floor lamp. Its using an SPT 2 cable (photo attached). Both wires have the same insulation color and both are copper. Neither is ribbed (as far as I can tell to the best of my ability). However, one side has inscription embossed while the other is completely smooth.
In this case, how can I identify Live and does it matter in a 2 wire setup? I am using a Leviton 5410.
Edit: I stand corrected. I have found the ribbed side, it is the wire without the inscription. Therefore is this the neutral?