Appleton GRL150 is a malleable‑iron GR‑type explosion‑proof and dust‑ignitionproof conduit outlet box, configured as a UNILET L‑style unit with two 1‑1/2" hubs for threaded metal conduit. It provides 72 cu in of interior capacity and a 4.88" cover opening, with overall dimensions of roughly 5-3/4" tall by 5-3/4" wide. The enclosure includes an internal ground screw and an O‑ring to seal the cover and is designed for hazardous-location service requiring explosion protection, with entries sized for two 1-1/2" GRL hubs.
