QUOTE(advocado @ Jan 2 2018, 03:14 PM)
oh wait i don't have to installed socket with me right now so i'm not sure if the socket is slightly buried inside the wall or sitting on the wall because i don't know how deep the box is buried. if it's slightly inside the wall yea it will look uneven.
the hole you make, is it bigger than the socket and need to patch up the edges?
but in this case if i don't want to make a square hole for the socket to sit in, how would i be able to install the 2-Gang as the surface would be uneven.
and if the socket is indeed buried slightly in the wall, how do i remove it to do the wiring since i assume it's stuck with the wall. meaning i have to chisel the 4 edges of the socket to get it out?
and based on what you say, the 2-Gang socket is already prewired between the 2, so i just need to disconnect the wires on existing socket and plug into the 2-Gang? for Schnieder sockets are the internal wiring quality good? if so i think replacing 1 gang with 2 gang is more efficient since they don't cost too much. safe the work to extend the wires.
is there such thing as a "Box Sinker" you use with a drill that makes a square hole for sockets? is it easy available in malaysia?
and regarding installing plugs on ceiling, how to avoid wirings if there is no wiring route drawings? i need to put plugs for lights on Concrete & plaster ceiling and there are existing wires poking out. plaster maybe i can go up manhole have a peek but concrete, usually are the wires buried close to the surface or deeper within the ceiling? to play safe i should use shorter plugs so they won't dig too deep?
The wall socket face panel is screwed into housing. Normal housing inside the wall is black plastic with two post where you screw the 3-pin socket panel. During construction, this black plastic housing is nailed onto the wall brick before wall plastering. They will leave square (more or less) opening just slight smaller than the socket panel so that when you screw the panel, it will sit flushed on the wall. This black socket is not meant to be mount on the wall. It is not good looking as white housing you see at the electrical shop, which is meant to be mounted on the wall, though you can still mount inside the wall. The black socket is sold at any electrical construction material.
If you want to mount something like this on the wall.
Just fill the hole with cement or tile the hole (if wall is tiled) leaving opening for wire and screw on top of the wall. This is faster way. If you want it flushed, then need to hack and recreated the opening and place the mounting housing inside the wall. A lot more work and you need power tool to ease the job or hire contractor
Many house wiring is not in conduit. Normal practice is that the wiring is laid and clipped perpendicular or parallel to the wall. Yes. they run in square pattern either perpendicular or horizontal, close to ceiling or along 3-pin socket level. So, whenever I want to mount screw for ceiling lighting, I will drill across diagonally and pray no wire underneath
Once I pulled a wire for external lighting. Mount a switch near a cluster switches and need to pull wire across the wall. However, there is 3 pin socket down there and the wire will intersect and I need to use disc cutter to cut the wall plaster. So, need to guess how deep inside the plaster those wire are. I was luck just 2~3mm above the wire. I pulled the N wire from the 3-pin socket and the the L wire from the switch met perpendicularly the N wire from the socket. Both wires then go outside through wall near ceiling. Then I plastered the wall nicely using white unshrinkable cement before painting it. Very satisfied with it.