Enabling Device 2 : Manually operated control device used in conjunction with a start control, when continuously actuated, will allow a machine to function
NFPA 79 Electrical Standard for Industrial Machinery, 2002 ed. http://www.nfpa.org/assets/files/AboutTheCodes/79/ 79-A2002-rop.pdf, (Electr Std for Ind Machinery - Amer) {225 NFC}