The notes for soldering worksheet answer to Question 2 about tinning suggest that stranded wires should be tinned prior to clamping in a terminal strip.
Although in the short-term this appears to be a good idea, in fact it is quite a bad idea because solder cold-flows under pressure - i.e. in a terminal strip - so the wire will become loose in time, with obvious consequences !
I'm sure this practice is banned under certain standards but I can't remember where I've read it right now. I'll report back if I find the reference.
"Notes:
Some wire may be purchase "pre-tinned" to save you this step, but most electrical wire is not. Here is a helpful hint: tinning the ends of a piece of stranded copper wire really helps to prevent individual strands from bending and breaking away when the wire end is clamped in a terminal strip! "
Although in the short-term this appears to be a good idea, in fact it is quite a bad idea because solder cold-flows under pressure - i.e. in a terminal strip - so the wire will become loose in time, with obvious consequences !
I'm sure this practice is banned under certain standards but I can't remember where I've read it right now. I'll report back if I find the reference.
"Notes:
Some wire may be purchase "pre-tinned" to save you this step, but most electrical wire is not. Here is a helpful hint: tinning the ends of a piece of stranded copper wire really helps to prevent individual strands from bending and breaking away when the wire end is clamped in a terminal strip! "