The use of isolation transformers that is suggested here is very dangerous as the residual current detector of the installation won’t detect anything if one gets electrocuted from the secondary of the transformer. I’d rather not use an isolation transformer unless I really need.
You’ll notice that I didn’t explain exactly how to correct this. I do this intentionally because I’m not going to do the work. This situation could be easily fixed by replacing the dimmer switch with a simple toggle switch, by installing a dimmer rated for a higher wattage, or by installing bulbs with a lower wattage. Any of those would be fine, but as the home inspector, I don’t design the repairs.
Grip comfort/security is greatly aided by the deeply sculpted thumbrest on the camera’s back. Combined with the textured rubber used over the whole right half of the body, it provides a very secure gripping point for my thumb, and does a lot to make up for the small size of the front grip. The rubber coating also contributes to a feel of solid build quality, by damping the body vibrations that often make small and light cameras feel tinny or cheap.
We’ve seen very few car charging hacks. If you know of one, or have been working on your own, let us know!
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Low voltage DC distribution makes sense in some cases. 12V is pretty low, though: copper losses are still high, so the amount of copper required is expensive for house-scale. 48V uses one sixteenth the amount of copper, and still is below the shock hazard limit. 48V rack systems are mature, common and are a great idea.
Typically, drivers are rated to handle surges in the range of 1 to 4 kV. The varistor, ranging from 7 to 14 mm in diameter, is usually located downstream of the fuse on the ac mains. However, to provide higher-level surge immunity for lighting installed outdoors in exposed surge environments, outdoor-lighting OEMs may want to add surge-protection devices (SPDs) on the ac input lines of their luminaires ahead of the LED driver.
If you do not know the exact value of each cost, you could enter an estimated percentage based on the cost of goods.
But my toaster uses heating elements contacted to 120 VAC, and so no barriers against ignorant ding stupid things. I agree the lower voltage is use because of the illusion of safet is probably why they use the lower voltages. Only an illusion to those who haven had the opportunity to study electricity or had made the effort to study it.
Good safety design will deliberately include a point (usually mains input) at which the creepage clearance is lower than any other place on the circuit board. This almost guarantees a *predictable* result from an extreme over voltage event.
Agreed…. I used to have a small plastic box in our workshop. It had two copper contacts on opposite surfaces, and a 9V battery, relay and tilt switch inside, and a Caution High Voltage sticker on it,
Google’s Cloud AutoML has been available since January to let users train their own AI tools without any previous coding knowledge. The drag-and-drop tool lets anyone create an image recognition tool, which has a variety of use cases such as categorizing photos of ramen by the shops they came from. You can catch a glimpse of this process in the video above, in which different photos of Waldos are fed into the software.
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