You will need an electrician.
Tim is probably right in that unless you are knowledgable, call an electrican. Saying that, if you are knowledgable, you must install a GFCI circuit outdoors. This can be tied into an existing circuit if that circuit has no more than 9 existing lights & plugs already connected. Use 12/2 with ground wiring.
No, it is more difficult than installing a new plug. You cannot reuse the wire, it must be a dedicated circuit, you will need a new outlet, and you will need a new breaker. Install a new plug.
Just install the new fixture with black to black, white to white, and cap off the ground wire on the new fixture. It'll be fine.
You probably mean to change it to a 240 V outlet... either case, you'll need to run a new wire and install a new breaker.
No, but if you ever switch to an electric stove you will have problems getting a 240 volt circuit to that location. I would go ahead and install a 240 volt outlet at that location if this is new construction. Costs very little and you will be all set for the future.
In most home renovations there is ample room on a branch circuit to add another outlet. Very seldom does an electrician, when wiring a home, load the circuit up to maximum outlet that the electrical code will permit. Now the thing that has to be kept in mind is what is the load on the circuit now. The second thing to keep in mind is how much is the new receptacle outlet's load going to be. A home branch circuit is protected by a 15 amp breaker, so that is the maximum amperage load you are able to apply to the circuit without the circuit tripping. If you are able to stay within this parameter you should be able to add another receptacle outlet to the existing circuit.
If t hat GFI is the only plug on the circuit then yes. If there are other plugs you have to find out how many so that you don't exceed the capacity of that circuit. If the GFI is the only plug there, turn the power off to it at it's breaker and run the appropriate wire to the new plug you want to install. Wire in the new plug, then make the connections at the old GFI plug. Always work towards the power, even if the circuit is dead. It's good practice. This way you rarely if ever have to work on live circuits. Start at the furthest point in the circuit away from the electrical panel and work toward it. You can have the new outlet protected by the GFI if you connect the wires from the new outlet to the LOAD side of the GFI. If the GFI is still new there is usually a yellow sticker covering the screws, those 2 screws are the LOAD side meaning that if anything happens downstream on that circuit to make a GFI trip the GFI will sense it and turn the circuit off. If you want just a standard outlet then put the new wires on the same screws as the old wires on the GFI. Once you're done, and all the boxes are closed and safe, turn the breaker back on.
You can't "change" the outlet to a 30 amp.The major limitation is the size of wire that feeds the outlet. A 15 amp circuit is typically run with 14 AWG wire. A 30 amp circuit must use 10 AWG wire.To add a 30 amp circuit you'll need to run a new wire, new outlet and connect it all to a new breaker.Always seek the services of a qualified electrician to make those kinds of changes. A mistake can lead to electrical fires and possibly death of someone in the home.
Disconnect the circuit breaker or fuse to that outlet. Then disable or replace the outlet. This is fairly easy and you can buy a new outlet at a home improvement store for a couple of bucks. If you are not comfortable working with these sorts of things call an electrician.
More like a plumber. The new disposal should have a plug end on it to plug into a wall outlet
Take the new antenna and your RX300 to Circuit City. They will install it for about $50.
You can, but be advised that whatever you plug into the new outlet should not exceed 5000W capacity (20A x 250V = 5000W)or you could risk overheating the new outlet with serious results. To prevent this, you should make sure the circuit breaker is a 20A also.
Install a new line.