Reginald and Camille, The question to ask here is why you need a Class 2 or power limited circuit. Is it because of the camera is not designed to meet outdoor requirements (raintight or watertight or dustproof, etc.)? Is it because the CCTV enclosure (polymeric possibly) is not designed to meet UV requirements or flammability requirements (ie HB material instead of V-1 or better). Assuming your CCTV enclosure is designed for outdoor environments in accordance to the applicable standard, your solution is to pick a suitable power supply for the voltage and amperage that the camera needs. The wiring between the power supply and the CCTV camera, can be any Listed wiring acceptable to the NEC. This is up to the electrician depending on the Listed wiring he finds and his determination whether to put in a suitable environmental conduit or not. Sure, you are trying to reduce the costs for the electrician so as he can use any type of unlisted wiring. But your camera voltage is higher than a Class 2 wet environment which as defined in the NEC I believe is 15 Vac or 21.2 V peak. To summarize: If camera enclosure is designed properly for the environment, then any power supply will do. Leave the wiring to the electrician and specify in the manual to wire according to the NEC/CEC. If camera enclosure is not designed properly for the environment, you need to redesign the enclosure to meet the environmental requirements or change the operating voltage that meet the limits for Class 2 wet environments. You will also have to source a suitable power supply. Best Regards, Peter Merguerian
Camille Good <[email protected]> wrote: Reginald, Actually, I think you are outside of Class 2 limits with 24 Vac 5 A, as the limits of Class 2 are maximum 30 Vac / 42.4 Vdc, maximum 8 A and maximum 100 VA. Your power supply is over the 100 VA maximum. That does also mean you are outside the UL 1310 limits (Standards for Class 2 power units). I am not that familiar with all the different UL requirements for power supplies, but I did some digging around on www.ul.com and found the following possibility: Standard - UL 1012: Power Units Other than Class 2 Category - QQFU: [Power Supplies] Power Supplies, General Purpose. Hope that helps, -Camille Good Portland, Oregon --- Reginald Henry wrote: > Info needed... > > I am trying to identify a UL Listed "Desktop or > Plugin " Power Supply. &g! t; > The Parameters are... > > Input 120vAC > Output 24vAC @ 5amp > > The power supply would be for out door application > .. meaning it is driving > units that are outdoors but the supply itself is in > doors. > I do realize that I am possibly in the realm of > Class 2 NOT Wet Class 3 Wet > > However, with my output requirements would this mean > that I would exceed the > limits of UL 1310 and must look for a power supply > other than one that will > meet the Ul 1310 standard ? i.e., maybe use a > transformer standard, ? > > Please advise > > > Regards, > Reg Henry > Reginald Henry > > > > > This e-mail message may contain privileged or > confidential information. If > you are not the intended recipient, you may not > disclose, use, disseminate, > distribute, co! py or rely upon this message or > attachment in any way. The > company accepts no liability for any damage caused > by any virus transmitted > by this email. Furthermore, the company does not > warrant a proper and > complete transmission of this information, nor does > it accept liability for > any delays. If you received this e-mail message in > error, please return by > forwarding the message and its attachments to the > sender. > > > > - > 2005 IEEE Symposium on Product Safety Engineering > 3-4 October Schaumburg, IL > http://www.ieee-pses.org/symposium > > > This message is from the IEEE Product Safety > Engineering Society > emc-pstc discussion list. Website: > http://www.ieee-pses.org/ > > To post a message to the list, send your e-mail to > [email protected] > > Instructions: > http://listserv.ieee.org/listserv/request/user-guide.html > > List rules: http://www.ieee-pses.org/listrules.html > > For help, send mail to the list administrators: > > Scott Douglas [email protected] > Mike Cantwell [email protected] > > For policy questions, send mail to: > > Richard Nute: [email protected] > Jim Bacher: [email protected] > > All emc-pstc postings are archived and searchable on > the web at: > > http://www.ieeecommunities.org/emc-pstc > - 2005 IEEE Symposium on Product Safety Engineering 3-4 October Schaumburg, IL http://www.ieee-pses.org/symposium This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/ To post a m! essage to the list, send your e-mail to [email protected] Instructions: http://listserv.ieee.org/listserv/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas [email protected] Mike Cantwell [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com - 2005 IEEE Symposium on Product Safety Engineering 3-4 October Schaumburg, IL http://www.ieee-pses.org/symposium ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to [email protected] Instructions: http://listserv.ieee.org/listserv/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas [email protected] Mike Cantwell [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
