12/2 mc with 16/2 TFN dimming wires in mc jacket

[Fordean]

1st Is their a special connector that can separate TFN wires Cable diameter larger than regular MC

2nd Do you have to have a barrier between Higher voltage wires and TFN dimming in the supplied box on a 2x2 or 2x4 termination box point on top of fixture.

3rd Wires within MC Hard to terminate 2 MC cables with integral TFN wires that are also in MC in the small termination compartments on top. Can't see two of these fitting in those small compartments provided as termination point on fixture
Should u single MC to each fixture, and have a common splice point on a local wall Where can splice 4 MC/TFN together Then run 1 MC/TFN to each light

 

[brantmacga]

You would size the connector based on the cable diameter. I would typically use a 40AST connector for luminary cable.

And yes I would recommend setting a j-box to run a single whip to each fixture. The compartment on most led troffers is too small for two cables even though they are provided with two KO’s.

 

[farmantenna]

Barrier is sometimes already in fixture JB. Some light fixtures I've added 4" sq box at the fixture because factory one was too small.