The two main reasons for this are electrical safety and fire safety.
Cable support above suspended ceiling.
Now most untrained installers see nothing but the tiles themselves as fair game for cable support.
For example a cable may come into contact with the cut edges of the grid at a notch where sections of grid intersect or may become trapped between a ceiling tile and the grid possibly when other trades are carrying out work in connection with the ceiling or other services routed above.
It has long been accepted as good practice to support cables above suspended ceilings.
A suspended ceiling includes a series of tiles supported by a framework suspended from a room s natural ceiling.
Methods of supporting cables makeshift solutions.
Suspended ceilings also provide excellent accessibility when running wires from one part of a room to another.
However you may have seen cables slung over suspended ceilings in a haphazard fashion and resting on the ceiling grid.
Supporting cable above suspended ceilings.
Refurbishments sometimes remove suspended ceilings to open up the area and this should be possible to achieve without the need for a rewire.
The suspended ceiling grid may not have been designed to.
Various reasons are given for this practice such as.
Had eia tia 569 precursor to the current tia eia 569a been followed there never would have been cable on the ceiling tile in the first place.