16-channel solid-state power controller for military and aerospace applications introduced by DDC | Circuit Breaker Parts

I don’t. I’m on my second ELECTRIC lawnmower, which by the time I bought a decent one cost me around $1600 for the two. I gave the first TORO away since it only had 1/3 hp on a good day. The current Snapper I have puts out a bit more than 1 hp and it is the first batter electric I’ve tried that had adequate power. Unfortunately, I need $600 of batteries to cut my lawn, but the fast charger can keep up with my lawn cutting so I can do my HUGE lawn and also a neighbors.

It doesn’t add up like that. What *does* add up is the power. At 240 volts, you pull twice as much power at 15A.

Aluminum wire has a lower ampacity than the same gauge copper wire, meaning aluminum must be larger to accomplish the same ampacity job as copper wire. The rule-of-thumb sizes rely on the lowest allowable temperature rating of the wire; in some cases, the circuit may have a higher ampacity if the insulation on the wire and the connection endpoints are all rated at 75°C (167°F) or 90°C (194°F).

The 20% derating is not something that everyone just knows, its part of the NEC. A 12AWG cable is actually capable of handling 30 Amps, but not according to the NEC’s derating requirements for wire temperature rise limits.

Rob, where would anyone ever get 10,000V from? Or even 1,000? Short of lightning strikes, these voltages don’t exist in the home, or in many factories. Why do those voltages matter?

Stripping wire with my teeth (my front teeth have a perfect gap at the bottom for it, I could probably specify them in AWG) to fit the socket onto a phone extension cable. While rather stupidly forgetting I’d plugged the damn thing in downstairs. Yowch! Fortunately it wasn’t ringing. As a mistake, it was educational.

I think this could have failed purely due to the inadequate heat sink, made worse by elevated summer temperatures. Add the possibility of counterfeits in, it was doomed to failure.

And you’d need to think about seperation (diodes to seperate the two paths?) if you wanted to read a local button press verses a node press, or would you be better off just doing that in software. Detecting a button press and checking to see if the node had recently issued one itself.

With the introduction of the RGC..32, Carlo Gavazzi now offers a solution for switching up to 37 AAC at 40°C that fits in the 17.8mm wide platform with a depth of 103mm. The RGC..32 is offered both with screw, as well as box clamp output terminals. The version with box clamps is rated for up to 37AAC @ Ta 40°C. This higher current rating on the 17.8mm compact platform is achieved through the utilization of a higher rated power chip that has an I²t of 18000 A²s. Due to this high I²t specification, the RGC..32 can be protected against short circuits by B curve Miniature Circuit Breakers, in applications where the UL508 SCCR rating is not required.

The issue with the DC heated beds seems slow temperature rise. Some bigger builds and beds need a quicker heatbed heater. (In my opinion not needed for PLA) Only for ABS.

When I was doing rehab work on old Chicago apartments I would often find electric wires run through abandoned gas lighting pipes, ready made conduit going to where the old gas light fixtures were, not exactly code and very confusing, especially since there were “live” gas pipes mixed up in the walls and ceilings with the ones carrying Mr. 120!

Isn’t welding the core kind of a bad idea as it will short the laminated plates and make it heat a lot?