OK here is what the ANSI EIA/TIA wiring standards say..to protect from emi/rfi
electric supply "Bare Light or Power of any Voltage-5 Feet" ..."Open Wiring not over 300 VOLTS 2inchs" ...."wires in conduit, or in armored on non-metalic sheath cable/power ground wires-none" ...."Floresscent lighting wire 5 inches" ... Note it also says there is no seperation required from shielded and grounded ... Hope that helps X