We are working in a bio diesel plant that uses methanol in the process. The owners have declared the classified area to be from the floor up to 4'. They have requested a feeder in cable tray from the switchgear to a heater control panel that will be purged with plant air with an interlocking alarm in case of pressure drop. The cable tray is 10' above the floor but the bottom of the control panel is within the classified area. I plan on the TC to drop down from overhead into an IMC conduit nipple with a seal off at the cabinet and seperating the cables when I pour the seal instead of using a harzardous location cable terminating fitting. Has anyone done this before in this kind of location?