The AlphaRefuge™ 2400 Series system Refuge Call Box(es) shall be Alpha Communications® RCB2400RN , or approved equal. The RCB2400RN Refuge Call Box(es) shall be Surface Mount type and shall be enclosed in a Red fiberglass NEMA 4 rated enclosure, suitable for outdoor use. The RCB2400RN Refuge Call Box(es) shall contain a built-in heavy-duty metal call button and Red call placed / call answered LED. Th e RCB2400RN Refuge Call Box(es) shall have power AND battery back-up power provided by the PWRAPC or PWRAPC112 (depending on system capacity) central power supply and battery back-up unit. The Refuge Call Box(es), shall be IBC, NFPA and ADAAG code compliant. Contractor shall observe all local and national electrical and building codes.