I have a very old house. I was unhooking the fluorescent light in our kitchen to put a round ceiling light in and the old fluorescent light was plugged into the ceiling (like any regular two pronged electrical plug). How do I wire the ground wire, the line voltage wire, and the neutral wire from the new light so I can plug it into the plug in my ceiling?
disconnect the outlet in your ceiling and expose the wiring and hardwire the new light this way, using the supplied wire nuts etc... if its an older home you may have trouble matching the new wiring scheme (black wire, white wire, copper wire) to what is existing in your ceiling... turn the juice off before you try (at the switch that controls the light and throw the breaker or pull the fuse just to be safe) thats always the way it works... attach the ground wire to a screw that holds up the new light (if its not grounded all the way through the circuit it wont matter anyway) if you have an electricity tester try and determine which wire is hot and connect the black wire to that one, white wire to the other one.. maybe you can tell by the way the outlet was wired which one was carrying the load if you look closely at where the connections were made, often times those hot screw terminals will be differnt color than the neutral (gold vs silver?).. if all else fails i would say the blue marked one was marked for a reason, probably to show that it is hot.
Undersized connector blocks are a particularly user-friendly situation. As you found out, the offered block replaced into ok for an ordinary connection, yet rubbish for greater complicated wiring. Wickes, Wilkinsons, BQ sell strips of connectors for a pair of quid.15amp blocks would be the appropriate suited style of length for 4 wires.
Your question was answered here except what to do with the ground and it sounds like you dint have one so just coil it and maybe some day when you rewire you can hook it up
I would remove the outlet and wire the light with the wiring powering your outlet. Black to black, white to white and ground to ground. Just like you would have if the outlet weren't there.