ELECTRONIC AND SAFETY STANDARDS



EMI EMC COMPLIANCE (ELECTROMAGNETIC COMPATIBILITY),
PCB STANDARDS, MIL STD, LINKS TO DOWNLOADS










Let me start by saying that the term "standard" is often misinterpreted. Generally, an electronic standard is a documented agreement established by a consensus of industry experts and approved by a recognized body. It provides rules, guidelines or characteristics to ensure that certain materials, products, and processes are fit for their purpose. In many cases, standards in electronic industry are voluntary. Nevertheless, voluntary consensus documents developed by an industry are often subsequently adopted by the governments as part of the regulatory framework. The state laws often establish some mandatory electrical characteristics such as those related to safety, energy efficiency and power consumption.

The safety legislations are intended to minimize the likelihood of personal injury, fire, and various dangerous conditions. So, what are the main standards applicable to common electronics and particularly to power supplies?

For commercial Information Technology Equipment (ITE) currently the main generic safety document is IEC60950. There is a number of commonly recognized testing laboratories that can certify compliance to IEC60950 or to similar national requirements (such as UL60950 in US and CSA22.2 No.60950 in Canada). However, UL60950-1 may soon be replaced by a new UL/CSA 62368-1 document based on IEC 62368-1.
Medical equipment used within the patient vicinity is covered by a more stringent IEC60601-1 series.
The EMI conducted and radiated out of ITE along its cables are regulated by EN 55022 (which is similar to CISPR 22). Various countries may also their own national standards. For example, in the US the emissions from commercial electronics are additionally defined by Subparts A and B of FCC 47 CFR Part 15. Electromagnetic compatibility (EMC) and immunity of most ITE devices is covered by a generic IEC/EN 61000 series. Current harmonics from equipment that draws current less than 16A per phase are set by IEC/EN 61000-3-2. US, EU and many other countries also regulate power factor for various classes of equipment, particularly for computers and power adapters.

Here you will find links to reviews and downloads of various electronic industry's standards.




STANDARDS AND
SAFETY AGENCIES
AND TESTING LABS

INFORMATION, REVIEWS AND UPDATES ON THE STANDARDS

ELECTRICAL STANDARDS DOWNLOADS

TUV America

UL Underwriters Laboratories

CSA International

ETSI - Telecom Standards

IEC International Electrotechnical Commission

ANSI American National Standards Institute

IEEE Institute of Electrical and Electronics Engineers

ISO - International Organization for Standardization

Index of Engineering standard organizations


PCB PRINTED CIRCUIT BOARD GUIDE - DESIGN TUTORIAL and SOFTWARE
List of EMI EMC standards

EMI-EMC Mil Std 461 specification chart

CB report overview

Interface bus standards (USB, I2C, cPCI, VME, EIA-232, EIA-422 /485, etc)

AC line voltages and plugs around the world

Understanding electromagnetic compatibility in SMPS switchmode power supplies- what is EMI

Current harmonic content specification EN61000-3-2 overview

Power supply safety quiz
The Code of US Federal Regulations

US military specifications and MIL-STD standards download

ESD standards

Generic Standard on PCB Design IPC-2221 (table of contents)

Qualification and Performance Specification for Rigid Printed Boards IPC-6012B (table of contents)

UL Electrical Insulation systems database

USB 3.0 Specification




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