| Thread Links | Date Links | ||||
|---|---|---|---|---|---|
| Thread Prev | Thread Next | Thread Index | Date Prev | Date Next | Date Index |
|
Masood – you are on point on this. Usually 802.3 standards have a ‘general safety’ and ‘network safety’ subclause that deals with this (as well as subclauses on particular
issues like telephony voltages or EMC). For example, 802.3bt states in its network safety: This subclause sets forth a number of recommendations and guidelines related to safety concerns. The list is neither complete nor does it address all possible safety issues. The designer is urged to consult
the relevant local, national, and international safety regulations to verify compliance with the appropriate requirements. LAN cabling systems described in this clause are subject to at least four direct electrical safety hazards during their installation
and use. These hazards are as follows: a) Direct contact between LAN components and power, lighting, or communications circuits. b) Static charge buildup on LAN cabling and components. c) High-energy transients coupled onto the LAN cabling system. d) Voltage
potential differences between safety grounds to which various LAN components are connected. Such electrical safety hazards should be avoided or appropriately protected against for proper network installation and performance. In addition to provisions for proper
handling of these conditions in an operational system, special measures should be taken to verify that the intended safety features are not negated during installation of a new network or during modification of an existing network. In our area, more relevant is the type of language in 802.3bw, bp, or bu, which also have an “Environmental Safety” section out specific relevant standards, for example: 96.9.2.1 Environmental safety In automotive applications, all equipment subject to this clause shall conform to the potential environmental stresses with respect to their mounting location, as defined in the following specifications: a) General loads: ISO 16750-1 b) Electrical loads: ISO 16750-2, ISO 7637-2:2008, and ISO 8820-1 c) Mechanical loads: ISO 16750-3, ASTM D4728, and ISO 12103-1 d) Climatic loads: ISO 16750-4 and IEC 60068-2-1/27/30/38/52/64/78 e) Chemical loads: ISO 167540-5 and ISO 20653 Automotive environmental conditions are generally more severe than those found in many commercial environments. The targeted application environment(s) require careful analysis prior to implementation. George A. Zimmerman, Ph.D. President & Principal Consultant CME Consulting, Inc. Experts in PHYsical Layer Communications 1-310-920-3860 From: Shariff, Masood [mailto:mshariff@xxxxxxxxxxxxx]
Folks, I was looking for the words used in some ISO/IEC/JTC 1/SC 25/WG 3 standards and found the “ bridge” language to connect from safety in regulations to “safeguards”
in application specifications that I mentioned during the call earlier. Some of the objectives we have control voltage, current, and topology, so are related to safety in the sense implementing these, will assist the overall goal of the installation not catching
fire, but the final word and responsibility of these rests with the safety documents such as IEC 60079 series. Safety (electrical safety and protection, optical power, fire, etc.) and electromagnetic compatibility (EMC) requirements are outside the scope of this international standard and are covered by other standards and regulations. However, information given in this international standard may be of assistance in meeting these standards and regulations. Welcome your thoughts to review/refine and customize the above statement to the needs of IEEE 802.3 10SPE Study group. Best regards, Masood
From: Peter Jones (petejone) [mailto:petejone@xxxxxxxxx]
Folks, As discussed in the 10SPE SG meeting in Ft Worth, we will continue to alternate AdHoc meeting days & times between Monday 9am-11am PT and Wednesday 7am-9am PT.
We have an AdHoc call this morning Wednesday, October 19, 2016 7:00 AM-9:00 AM (UTC-08:00) Pacific Time (US & Canada). Webex Details below. Initial agenda is
If you do not have the outlook invite and want it, please contact me. Regards Peter _________________________________________________
Peter Jones 802.3 10SPE Study Group Ad Hoc Chair _________________________________________________
-----Original Appointment----- As discussed in the 10SPE SG meeting in Ft Worth, we will continue to alternate AdHoc meeting days & times between Monday 9am-11am PT and Wednesday 7am-9am PT. This is the Wednesday meeting series. The goal of these meetings is to hear contributions to progress the work of the study group (i.e., develop a PAR, CSDs, and objectives). Please send requests for presentation time (including title, presenter, approximate time needed) at least 60 hours (i.e., 2.5 days) before the meeting time (e.g. Friday for Monday,
and Sunday for Wednesday), and send presentations at least 24 hours before the meeting. Early requests are greatly appreciated. If there are no requests for presentation time, the meetings will be cancelled. Regards Peter _________________________________________________
Peter Jones
802.3 10SPE Acting Study Group Ad Hoc Chair _________________________________________________
|