Wire preference - stranded or solid

[Teched3]

Al,
Excellent point made on stranded wire compression at a terminal connection.

[MikeE]

There is no reason to use solid core for any of the "large wires" i.e. 22 AWG or larger, but it's fairly common to see some of the bundled data wires (RJ12 telephone cable for CAN bus or ethernet cabling) using solid core rather than stranded. I'd still prefer to use stranded for these applications but IMHO it's less critical.