12

I can understand your concern. This is going to be difficult for two reasons: Finding out the agency that is responsible for the maintenance may be next to impossible for a layperson. Note that I said "maintenance", because this might be a different entity than the owner due to agreements. Due to the number of complaints that the public agencies receive, it ...


6

Here in the US, I would contact the state department that manages roadways. Those are referred to as the "highway department", "department of public works", and various other names. Here in Massachusetts it's the Department of Transportation, often known as "Mass DOT". Nowadays state governments have web sites, so it should not be hard to at least find a ...


5

This is not an authoritative answer as I don't know the ATEX regulation that well. You have it however right that the ability to form a spark is relevant here. So your next step would be to look at the materials you use. Steel gives sparks on occassion. Most ATEX mechanical tools (hammers, wrenches) are from Bronze or Beryllium, so I would research in that ...


4

why not scrap all the obsolete bands and reassign the 1 GHz - 6 GHz range to WiFi? First of all, these bands are not obsolete, there are many uses that might seem outdated, but won't go away easily. Check for example the use of the Ultra high frequency band. Notice also that - yes - the use is country dependent, so if one of these bands have a critical ...


4

In addition to the other answers, I would advise you to not underestimate the utility of going to one of your elected representatives. Unless you live in Nebraska (which has a unicameral state legislature), you have two state representatives, a US House representative, and two US Senators that you are a constituent of. While part of their job may yelling ...


3

The question mentions numerous states, but I will use Washington State as a defined example. Law The state law interpreted guidance in Washington states this: Digital Signature A Digital Signature has the following properties: A. It has a hardware or software cryptographic protection (such as a public/private key pair) that is unique to the licensee. B. It ...


3

You might look up NCAP and ASIL-related documentation. However, in general, all vehicles of a given class are required to meet safety standards at a given speed. It's rather doubtful that any vehicle will be approved as a personal passenger vehicle if it cannot attain highway speeds; similarly it's unlikely that anyone would bother to require ...


3

I think you may be misinterpreting aerial wind turbines as a type of aircraft. The FAA section of the Code of Federal Regulations defines an aircraft as a device that is used or intended to be used for flight in the air. I suppose the real debate comes down to what you define as "flight," which the CFR does not deal with. While an aerial wind turbine ...


2

In the United States, you can often use nationalbridges.com and uglybridges.com to ascertain the current status of a bridge, along with some basic information about the owning agency/maintenance agency. Ordinary road/highway bridges are usually inspected on a biennial basis, and given a sufficiency rating out of 100. If a bridge is identified as having ...


2

That is an oversimplification. From the data sheet http://www.ti.com/lit/ds/symlink/lm2596.pdf there are two relevant features, internal over-temperature protection and a maximum current limiter (Typical value 4.5A, minimum 3.6A). The bottom line is that trying to get more than 3A continuous current from the regulator will probably not end well.


1

What is the measurement Spectrum? From BS EN 60704-1:2010+A11:2012 Page 10, Section 4.1 Paragraph 3 The preferred noise emission quantity is the A-weighted sound power level, LWA, in decibels It is not correct to assume that a peak at 10kHz is outside the measurement range - you can reduce your 75dB measurement by -2.5dB according to the curve shown ...


1

There is no legal requirement to follow any specified design method or standard. From https://www.gov.uk/guidance/ce-marking: It is up to you to ensure that your product complies with the essential requirements of the relevant EU legislation. The use of harmonised standards remains voluntary. You may decide to choose other ways to fulfil these ...


1

I don't know for sure, but I doubt that would be the case because all of the E-Stop circuits I have worked with signal shutdown on the transition from high to low; this ensures shutdown even if the E-Stop wiring gets disconnected. Also, how would any operator ON-OFF switches work? Would they be "hot" the entire time the equipment was powered off, such that ...


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