A method and a system for estimating electricity consumption of electric appliances and an abnormality alarm system, enabling estimation of individual electricity consumption of electric appliances in operation in a building or the like by a non-intrusive method, and comprising a measuring sensor, data extracting means, and estimating means such as an LMC. The injection is prepared by one portion of piperphentonamine hydrochloride, 2. The individual step or steps are removable and have connection features which detachably connect with connection features upon one or more pieces forming a base.