I have a problem driveway that is constantly eroding. Every year or so, part of a 2500 ft long driveway erodes, especially at a high slope area. Most of the drive is manageable with diversion swales sending water off the road. in one spot though, two conditions are a problem: high slope...
I'm designing a controller for a small process heater, switching 220volts at 20amps. Since the controller uses a ramp/hold pattern with a lot cycles, an SSR is recommended for reliability. Question is: should it have a two pole relay? the 220volt is the north american "two phase" system...
