Is it permissible under the NEC to use the feed thru provision on GFCI recptacles to feed other devices(lights, etc) besides receptacles. I realize that no GFCI protection would be provided or needed for the non-receptacle devices, but it is merely for wiring convenience sake. We are begining to make UL listed outdoor electrical equipment that contains a feed thru GFCI receptacle on a 20 amp circuit and I want to be able to offer that feed thru option to end users if it is allowed. Thanks for your time.