Differences Between UL Listed and UL Recognized

http://www2.sea.siemens.com | Differences Between UL Listed and UL Recognized | 2007-12-21

Recognized Component	Listed Product
UL issues yellow "Guide cards" with a Guide No. and a File No.	UL issues white "Guide cards" with a Guide No. and a File No.
Devices are identified on the rating plateusing the "UL recognition mark":USA: U, cUUSCanada: cU, cUUS	Devices are identified using the "UL listing mark" on the rating platee.g. USA:u LISTED 165 CCanada:cu LISTED 165 CIND. CONT. EQ.IND. CONT. EQ.(165 C stands for: Siemens, A & D CD Division, Amberg plant)
Devices are approved as modules for "factory wiring", i.e.:as devices for installation in control systems, which are selected, installed, wired and tested entirely by trained personnel in factories, workshops or elsewhere, according to the conditions of use.	Devices are approved for "field wiring", i.e.: •as devices for installation in control systems which are completely wired by trained personnel in factories, workshops or elsewhere. •as single devices for sale in retail outlets in the USA/Canada.
If devices are Underwriter's Laboratory or Canadian Underwriter's Laboratory approved as "listed products", they are also approved as "recognized components" and allowed to be marked U or cU.