For NEBs stuff - as you already know, there are stringent structural requirements for some types of end-use.
As for GR-CORE and IT safety - there are the obvious flammability and electrical insulation requirements for plastics; and UL60950-1 has some additional requirements for really big pieces of plastics. And the Di-electric withstand and leakage current could be more onerous for some applications. I had a customer that put one of my power supplies into an ABS and then into a polycarb chassis - he had some ESD and surge immunity problems with his stuff that had not been problem with a metallic construction. Mostly because he changed to a Class II construction and removed the ground wire - what a maroon. I do not know about the effect on CISPR-type emissions - could be a big mess for some stuff. Brian From: [email protected] [mailto:[email protected]]On Behalf Of Jayasinghe, Ryan Sent: Thursday, August 05, 2010 12:51 PM To: '[email protected]' Subject: Polycarbonate Chassis Importance: Low Hello Group, I have been asked to investigate the possibility of changing one of our chassis' material from Steel to some type of polycarbonate, the motivation is strictly cost. There will be some metalized shielding on the inside. I don't have all the specification on the shielding properties at this time. The product is roughly a 1Ux12"x 12" ITE product AC or 48VDC ~35W power two port RJ45 Ethernet for UTP. FCC, UL, NEBS Type 2 and 4. I am concerned about the ESD and EMI aspects as well as other issues such as grounding. I will be interested in hearing any horror stories or outright restriction or test hurdles that maybe encountered. Cordially, Ryan Jazz Jayasinghe Compliance Engineer x1198 Canoga Perkins Direct:(818) 678-3898 20600 Prairie Street Company:(818) 718-6300 Chatsworth, CA 91311-6008 e-mail: [email protected] - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <[email protected]> All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc Graphics (in well-used formats), large files, etc. can be posted to that URL. Website: http://www.ieee-pses.org/ Instructions: http://listserv.ieee.org/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: Jim Bacher: <[email protected]> David Heald: <[email protected]>
