As I have previously stated, none of us know everything. I am here to learn. I have been aware of the code requirement to keep conductors in close proximity for years(surprise, I even know why we need to). However, I am an industrial E & I mechanic, and not a residential wireman. Therefore, I simply have not had to install these fixtures, and don't know the ckt. requirements. I have, however, installed and programmed VFDs and other motor control circuitry, UPS systems, process control instrumentation, and intrinsically safe and explosion-proof equipment in hazardous locations. I prefer to ask questions and offer suggestions in an environment where I won't be talked down to.