A point, the cable used to run to a skt should be solid core and for plugs it should be stranded using stranded for skts will lead to connection problems and using solid for plugs you may end up with broken wires as it isn't flexible.
Sorry don't agree with the 'using stranded for RJ45 plugs'. Every RJ45 plug I have ever fitted (several hundred) has always used solid CAT5 cable - that is what they are 'usually' designed for.
Yes, there are the odd ribbon type console cables etc. which may use stranded, but on the whole solid core is correct.
Totally agree with solid core, of the correct gauge, for the socket wiring.