2016 NFPA 72 requires detection for recall (21.3.7)
-if a sprinkler is provided in the elevator pit, a detector is required. Smoke detection is preferred, but may not be suitable for this location. ANSI A17.1 (188.8.131.52.4) requires Type 4 NEMA 250 rated equipment in the pit.
Does the detector (smoke or heat) and related low-voltage wiring need to be Type4 NEMA 250 rated?