Hi Ryan,
You should also be concerned about safety in general where changing from a steel enclosure to plastic has fire enclosure and grounding integrity implications. And more importantly, doing so would have NEBS impacts (pardon the pun) especially relating to vibration and earthquake structural integrity issues that would almost certainly arise. And, the cost and consumed time of NEBS retesting alone should be stimulus enough to resist such a change. As for horror stories, the horrific videos that I’ve seen from the effect of NEBS testing of steel enclosed products should weigh in on that decision. I do not, but does anyone have any weblinks to some of those videos? I know I’ve only scratched the surface with this subject, but I hope it helps in the decision making. Best regards, Ron ________________________________ From: Jayasinghe, Ryan [mailto:[email protected]] Sent: Thursday, August 05, 2010 12:51 PM To: [email protected] Subject: [PSES] 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] www.canoga.com <http://www.canoga.com/> FAX:(818) 678-3798 - 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]> - 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]>
