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Power grid: If 2 million households were to turn off their energy at the same time and turn it back on?
- Yes, in this extreme case, it may damage (BOE calculation: 2 million x ~500 watts: ~1 billion watt) if they are on single grid. In many of equipment (motorized) start-up losses are significant. So, you may end-up with little saving and a big grid failure. But if you leave aside such extreme situations, it is always good to turn off electrical equipments even for a short gap. And just to add, beware of leaking currents (e.g. not disconnecting appliances from the power plug) which are bigger concern.s
electrical outlet issues?
- This is not a small issue, call a qualified professional electrician to do the work quickly. Your husband may be able to find and repair the problem, but a pro can probably find the problem in an hour. Fixing it depends on what the problem is. Open grounds could be a case of old 2 wire power in the house, also the line and neutral could be reversed in a 2 wire system and that will cause the new electronic equipment to do many strange things. Since you have fuses in the system, I suspect a system installed before 1960 and it needs a complete upgrade. If you have just purchased this house, did the home inspection show the electrical panel inspection and did you then negotiate the needed upgrades?s
What happens when you have reverse electrical polarity?
- YESespecially if you have anything greater than a brief contact. Car and marine batteries are designed to deliver a huge amperage (that is why jumper cables are so thick) for a relatively short time. The best thing is to use a automatic battery charger used for car batteries which usually has a reverse polarity light on them that flashes or beeps if you accidentally hook up the cables backward. Or hook a multimeter to a known battery , like a AA battery with the positive terminal labeled, and put the red lead of the multimeter to there and the other lead to the other end of the AA battery. If the digital readout is positive 1.5V or so then measure the marine batteries with the same red lead and if the multimeter shows a positive direction then you know you have the positive terminal. If the multimeter has a negative voltage, then you know you have to reverse the cabless
Mechanical Engineering or Electrical/Computer Engineering?
- In terms of jobs, opportunities, money they all are basically equal. The question is what type of problems do you like to solve. I went into Electrical because I aced those chapters in high school physics. Today I solved several problems. I had one phone conference. Help plan a project, work that was to be done, material needed, key people. I made several follow up phone calls to see where key equipment and what calculations were completed. I reviewed a arc flash study, spot checked by hand a few of the computer calculations. Programs a great, but garbage in garbage out. About a month ago I was out in the field, and my friend Chris had a problem. Chris may be a mechanical engineer, but he is a real motor head. Chris is an expert on rebuilding 50 year old electrical equipment like 15kv breakers. This breaker would not open, and it was stuck so you could not unplug it. Chris injected lubricant into the socket, and had the men rotate the coupling by hand so the lubricant (special lubricant that Chris had to specify and buy) would penetrate. The were then able to unplug the breaker for the first time in 30 years. Chris then had to figure out what was wrong with this complex piece of equipment that can interrupt a 25,000 amp fault in 5 milliseconds. It turned out some grommets were worn. Chris replaced the grommets with ones he had specially machined. Chris then had to tune everything up so the breaker could interrupt a 25,000 amp fault in 5 milliseconds. The only other engineers who can do this are old enough to be Chris's dad, or granddad. These are some of the things real engineers do.s
how do I calculate Federal taxes on the sale of raw land owned for15 years.?
- The property taxes were deductible each year on your 1040 schedule A. Interest to pay for any investment property would have to have been capitalized (added to basis). Utility hookup is a capital expense. Homeowner fees are not deductible.s
House wiring responsibilities?
- You should never work on a circuit that's live or has electricity in it. Always make sure the circuit breaker is shut off and is labeled as being worked on so somebody else doesn't turn it on. Other than that, do the work according to the electrical code in your area.s
E-cig vapor safe around electricals?
- Very dangerouss
What Ground Penetrating equipment to buy?
- Without knowing the specifics of the survey, here is my opinion. I really doubt the GPR equipment will find plastic pipes. They will not change the electrical resistivity of the ground like metal pipes would. Also, GPR is rather long wavelength so again, locating a 1/2 pipe would be fairly hard, unless you make a dense 3D grid across the area. Metal pipes are very easy. Purchase a 100$ metal detector instead of a ten thousand dollar+ GPR and computer.s
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