What are the pros and cons of hiding wires inside the plaster ceiling when decorating?

This is a kind of wrong way of routing, but also a lot of decoration companies to cheat people of the means of people a, now the wire routing are calculated in meters, about 28-50 between, go to the wall to casing, go to the gypsum line do not have to, but the money is as much. Furthermore, the purpose of wearing a pipe is in order to if a problem occurs can even be drawn out, replacement, and in the plaster line or the top can not be drawn out at all.

At the same time walking on the top if the line is high heat, then it will cause a fire.

Use flame retardant hose threading, you can directly thread the line