MIL-DTL-24347 Monitor, Available Load, 60 And 400 Hertz, A.C., 1 Phase, Electrical Power \(Naval Shipboard Use\)This specification covers an available load monitor \(ALM-2\) to be used for sensing a load on either a 115 or 440 volt single phase circuit of either 60 or 400 hertz \(Hz\). ALM-2 is a direct replacement for ALM-1. ALM-1 is not to be procured for new constructions or replacement purposes.