Never heard of "standard commercial practice", however the NEC would require
specific types of metallic cables, such as MC for wiring in the void above a
hung ceiling, when it's used as a plenum, in a commercial environment. This
doesn't apply in a dwelling




"aemeijers" wrote in message
...
samurai wrote:
I wish to install 6" recessed lights into suspended ceiling, they are
very light, using 60watt bulbs, or possibly CF bulbs.

Do recessed lights in a suspeneded ceiling require them to be
supported with wire from the joists above, or can they just be mounted
into the ceiling tile(2x4)?
Is there any other way they can be mounted into the ceiling tile?

Do I need to run armored cable from the juction box to the light?

Thanks,
samurai.
Commercial-size (2x4)lights usually have their own hanging wires or
chains, in my experience- don't know if code requires it, but as flimsy as
most grids are, it is cheap insurance against head bonks, especially in
earthquake country. For a round can light, a single wire hanger would
probably be plenty. Even the stiff tiles tend to sag in humid weather, so
best to not load any weight on them. The ones I have seen installed all
had armored cable, but it was pretty lightweight. I think it is more to
protect the wires when people are mucking about up there, so the wires
don't get caught between sharp metal edges on the grid or fixtures.

'Standard commercial practice' is usually standard for a reason.

aem sends...