Featuring a NEMA 1 indoor enclosure and clearly labelled terminal to facilitate the installation, the RLY-4PL small relay panels are designed for use with snow melting, slab heating, and roof de-icing applications. Appropriate for use with 120, 208, 240 or 277 VAC cables, they are virtually silent during operation. The RLY-4PL panels are C-UL-US approved and rated for up to 24 amps.