If you run a separate earth wire that is hard grounded at the sub and hard grounded at your house and nowhere in between. In this situation if you get a lightning strike at or near your house then the ground potential rises. This flows through the earth wire to the sub ground and can be a massive current, enough to make the network fail dramatically. This rise in ground potential can also be caused by other things such as a faulty insulator on an MV or HV tower (pylon) or pole. Even if insulators are good then you can still get this ground potential rise. You can easily measure it with a length of wire and two earth spikes, put one near a tower and the other a distance away and you can see a significant voltage. If you also have a separate wire called neutral running form the sub then the potential between that wire and the earth wire is unknown so you have a risk of lethal voltage between neutral and earth, a situation that is not expected and potentially extremely dangerous.
I flashed Tasmota firmware onto the Sonoff, and configured GPIO2 as a counter, and I now have the whole setup reporting to Node Red, which switches the pumps on and off on schedule, or as desired. I’m quite chuffed with the result, although now I need to learn a lot more about how Node Red works! 
The 40 Gallon Hot water tank takes 22 Amps with both element on. And you used a 25 Amp relay. What really happened is you under rated your relay. Solid state or Mechanical does not matter. At the Max for a load it should never use more then 80% of your ratted load of your switch/relay/controller.
I think the only conceivable danger to using relays would be that they could weld themselves shut. But in this case, the relay contacts are rated for 30A and I’d not be likely to exceed even half that. The only other failure modes of relays are safe (the relay failing to close, for example).
Youtube helpfully suggested this teardown of (apparently) the same relay. Who knows if any of these are fake.
Flake has said he won’t back any judicial nominees until he sees a floor vote on legislation that protects special counsel Robert Mueller and his investigation into Russian election interference.
We first saw this feature in Sony’s DSC-TX1 and DSC-WX1 in mid-2009. Since then, it’s been mimicked by other manufacturers, but none seem to do it as well as Sony. In Handheld Twilight mode, the camera captures up to 6 shots in rapid succession, micro-aligns them with each other, and then adds them all together. The net result is that you can hand-hold ridiculously long exposures and still get sharp results, with very low image noise to boot. Combine this with Sony’s SteadyShot image stabilization and sharp handheld photos at half-second exposure times are feasible.
Personally, I’m most excited about this for YouTube, since there’s never been a great, seamless way to make Sonos play audio from the leading video platform. Now you’ll just have to tap the AirPlay icon. There will likely be a bit of latency between sound and image with AirPlay 2, so it might not be ideal in all cases. But at least it’ll be a relatively easy option. Same goes for Netflix, HBO Now, and other apps that Sonos hasn’t previously supported on its end.
2) If breathing and everything seems fine, there can still be some arrythmia that will manifest only hours later. It is a good idea to visit a doctor for EKG readings, or at the very least have someone monitor you for the next few hours and if you go unconscious, be present to give CPR & call ambulance.
After checking to make sure the outlets are wired correctly, a 220v light bulb with light up across the two hots if they are opposite phase and not if they are the same phase.
The list of absolutely required tools is missing the appliance tester. e.g. something like this http://www.fluke.com/fluke/m2en/Products/category.htm?Category=PAT or https://www.gossenmetrawatt.com/english/ugruppe/testingofelectrappliances.htm
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