Inside A Circuit Breaker With MikesElectricStuff | Circuit Breaker Parts

The key is to reference NEC NFPA 70 Table 310.15(B)(16) to find the ampacity of a conductor and size that conductor according to the MCA listed on the unit label. When this is done, the conductor will be properly sized according to the NEC.

It’s the peak rating. For constant loads, or anything that could be temporarily constant you need to de-rate.

This time, though, he says he’ll only change course once the Senate votes on a binding bill. Now, it’s up to McConnell.

i have 300w 12v silicon heat bed i just use a 700w pc power supply and 70A relay it heats bed over 100 oC in about a minute no problem

The reason may be the cost of getting UL approval. You can buy off-the-shelf, UL approved, 12/24VDC power supplies. Once you are working with 12/24VDC most products don’t need further UL approvals. But — if everything is mains power you are going to have to pay for a new round of UL testing. That can be $10,000 or more.

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I can’t speak for 75 mph, but the EPA for the regular hybrid Niro is high 40s to 50 mpg highway. Since this car uses the same Atkinson cycle 1.6L engine, I’d expect about the same fuel economy.

Yeah, the US connector system is a mess. I just installed a system that’s supposed to use a NEMA 6-20 plug, but the building services people installed a NEMA L6-20 receptacle (locking version). Same electrical specs, but they don’t mate. Back to lopping off the plug and wiring my own g-d connector… Arrgh.

But it’s not clear just how aggressive Flake is willing to be. On Thursday, he withdrew his opposition to a judicial nominee for the Eighth Circuit, a move he said was to balance out the absence of Sen. James Inhofe (R-OK), who was called away for family reasons, according to the Washington Post. Senators sometimes do this, as Sen. Lisa Murkowski famously did during Brett Kavanaugh’s confirmation when she withdrew her vote and was marked as “present.”

Also, if you leave your oscilloscope floating at mains voltage with an isolation transformer puts you in danger as all earthed parts of the oscilloscope will be floating at that voltage. Again: when things are floating, it is ok to have 1 fault.. but the second fault will definitely kill you or break something as no RCD will protect you.

This device – and any high-powered device that’s home-built – should be regularly inspected to insure that the wiring is not degrading due to heat caused by increased resistance. That’s why the chassis has a clear lid.

I don’t know where your grid is, but in North America, high voltage lines are not 100 kV. 19 kV and 69 kV are typical for local distribution. 115 or 138 kV for intra-city, and 230 or 500 kV for most long-haul lines, not counting the whacky HVDC or EHV stuff.