Motor, Totally Enclosed : A motor enclosed so as to prevent the free exchange of air between the inside and the outside of the case but not sufficiently enclosed to be termed airtight
NFPA 20 Standard for the Installation of Stationary Pumps for Fire Protection, 2007 ed. http://www.saltech.co.il/_Uploads/dbsAttachedFiles /NFPA_20.pdf, (Std: Instll of Stnry Pumps for Fr Prac - Amer) {188 NFC}