The answer depends on the type of tile. To cut acoustical tile, use a ruler or steel tape and a utility knife to mark your cut, the go back and forth down the cut line going deeper each time. Finish the cut off by turning the tile over and starting at the top edge, go down the back side once.
The existing ceiling would have to have a framed roof above it, not roof trusses or second floor joists. The ceiling joists would have to be temporarily supported and walls may have to be temporarily braced from lateral movement. Ceiling joists would then need to be cut and headered off with properly sized headers with the ends properly supported with appropriate weight transfer methods. New ceiling joists would then be added above the raised area. Not a job for a do-it-your-selfer usually.
The best person to ask is a contractor whom you trust. He/she needs to come to your home to examine the ceiling. Some parts can probably be cut out, but there are other parts that are holding your roof up.
If you appear to have a problem with wiring in ceiling and no ceiling access, you may have to make your own access. One way in a Sheetrock ceiling would be to cut a hole that will fit a quick access panel. This way you won't have to repair and repairing the area.
The light wouldn't go on unless just the neutral was cut and there was a separate ground.
use a compash
You will want to leave about 8" of wire sticking out of the box. After connecting the light just push the extra back into the ceiling box.
Depends on what ceiling is made from and exact type of damage. For instance if made of drywall and it's water damage, then you find the studs (with a studfinder) and cut out sections of drywall and replace with new.
You untie the rescued spies by clicking on them. For the first spy, you will have to enter the vault through the ceiling.
www. creativecornicing .com has pre-cut corner pieces for cornices. all you need to do is glue the pieces together. no more battling with mitre cuts.
All you will need to cut out is the hole for the drain, probably 5 inch circle. The ceiling below and how you route the drain is always different.
Holes can be made with a knife, drywall keyhole saw, jig saw or appropriately sized drill bit.
the sentence for ceiling can be.. the ceiling is black
The safe answer is, "you don't" however if you must, you should seek guidance from a structural engineer with a residential construction background.