Engineering Stack Exchange
Engineering Stack Exchange

Questions tagged [regulations]

questions about rules and regulations in the political sense; not to be used for questions about voltage regulation

14 questions
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How should the public raise questions about unsafe structures in the United States?

In a program on NPR that I was listening to, there was a bit about a bridge that from the description sounded to a layman as unsound and is still in use. The program described it as an old wooden railway (and I'm aware that has its own set of…
user348
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Do regulations in the United States limit the size of aerial wind turbines?

What with all the work done by the FAA recently on regulating drone usage, I thought it would be nice to turn my eyes to the sky for another, less-known type of aerial denizen: the aerial wind turbine. Wikipedia has all the relevant information, so…
HDE 226868
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How does non-electrical ATEX apply to springs?

This question relates to the ATEX directive, which is the European regulation governing the design of products to be used in explosive atmospheres. In particular, I am asking about the part relating to non-electrical (i.e. mechanical) devices. Does…
Time4Tea
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Is there a CE mark requirement for positive control logic?

I am looking into any requirements to obtain a CE mark that require control logic to be positive. In other words, if an electronic circuit has logic that either resets or turns the circuit off, is there a requirement that the control line activates…
James
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Maximum amps from a switching voltage regulator

Looking at a part like this LM2596 It is rated for 3Amps with a voltage range from 3.3-12 volts. Does that mean that this voltage regulator will only output a maximum of 3amps?
eestudent
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Why is WiFi increasing frequency?

WiFi at 60 GHz provides a theoretical data-rate of 7 Gbit/s. The trade-off is limited range and penetration. The main reason for this awesome data-rate is a 9 GHz bandwidth, from 66 GHz to 57 GHz. I think this is country/regulation dependent, so 7…
user19087
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Do Car Safety (Colision) Regulations Depend on Max Speed?

To what degree is a Car's crash worthiness dependent on max speed? If a car could only reach a max speed of 45 mph, would it require less protective measures than your average car that goes 60+ easily? I am interested particularly in the US and the…
Dale
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Sound level emissions (IEC 60704-1) spectrum?

I have a very noisy air conditioner that have a 10kHz peak at 75 dB, the rest (fan/compressor/pump) are under the regulation limit. I would like to understand what is the measurement spectrum. I think 10kHz is out of the measurement spectrum, but I…
nowox
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When using digital signatures, what does "capable of verification" mean?

Numerous state regulations adopt the NCEES model language for the use of digital signatures. This language says, among other things, that the signature must be "capable of verification." It is not clear to me what this means, though I can make…
Stephen Collings
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Origin of barricade tape color combinations (allegedly OSHA)

Various sources (e.g., Wikipedia and WorkSafely) claim that the seven color combinations commonly used for barricade tape (a.k.a. caution tape) and safety markings in North America (yellow and black for physical hazards, green and white for first…
Reign of Error
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In Elevator Phone Connectivity Reuirements ASME 2019 is WIFI bridging Acceptable?

What is acceptable connectivity for an Elevator Phone system. As analog systems are going by the way side, Cellular is one option, however is it acceptable to use point to point WIFI bridging to accomplish this task and where in the code regulations…
Ken
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How to get my product IEC tested and certified

What is the procedure to get proper IEC certification for a product? What is cost of such action? I am talking about, let's say, a fan or an oven (if size and complexity of product makes any difference)
Name
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Is acrylic OK for children's toys under EU regulations?

I am developing a toy for 2-6-year old children with parts in acrylic ( Poly(methyl methacrylate)). I searched Toy Safety Directive 2009/48/EC and Regulation 1907/2006 REACH for mentions of perspex or acrylic and found nothing. Is acrylic OK for…
ginjaemocoes
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Zeros of a Trransfer Function

I would be grateful if someone could explain me what does the value of zeros of a transfer function tell about the dynamics of the system.
Barney
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