One Way To Splice a Power Cable

[FEM2008]

Thanks for this Rick

The method you show is the prescribed way used by NASA, in house and by their contractors.

It's been a while since I looked, but I thought NASA required the splice be wrapped with bus-wire before soldering for stability. Regardless of NASA, if these cables handle mains power or decent amount of current, they should be mechanically reinforced before soldering. Crimp is the preferred method, but wrapping with solid wire is acceptable. I have seen, on more than one occasion, over-current melting the solder joint before the circuit breaker could trip. Should the live end of the wire detach and touch something, it can be hazardous.
While I am at it, tinning wire before crimping, or using in screw clamp connectors is a bad idea, since the solder relaxes and migrates overtime and the joint becomes loose (solder does not spring back and push against the screw, leading to loosening over time).

However, on low voltage and low current circuits, I do the same thing.