BA-C-D-E Series Class 2 Energy limiting small box mount used in chimes, door bells, security systems, decorative lighting, furnaces, humidifiers, appliances, vending machines, intercom system type applications. Rugged, low noise, cool running design, indoor use only. Nipple locknut mount for box installation, complete with locknut and mounting bracket. UL listed #E184371 - EXCEPT for part numbers BE2F & BE7G. CSA certified (209651).