Q:How do I calculate (using mathematical equations) the load of my equipment to support and find the correct alternator and battery for my vehicle? I'm looking for an in-depth equation that explains what I have to find from the equipment specifications to the mathematical part evolved. I want to make the right choice for my vehicle without any word of some salesman to sell me a product with little to knowledge of the product they are selling.

Power (watts) Amps x volts and Voltage Amps x Resistance are the two basic formulas

Q:i have 1 electrical equipment .its data sheet showing .power details, 100VAC to 240 VAC 50-60Hz, 15watts, how can i calculate power consumption of this unit,i need formula also,

You have the number, 15 watts. but that is a maximum, the actual power will be less than that. If you need the actual power, you cannot calculate it, you have to measure it. .

Q:For a treadmill.I could get a manual for reallly cheap but I had my heart set on an electrical one.I've never really used a manual oneWhat do you think?

Get the Electrical one you will like it more.

Q:I have a deep interest in professional and vintage audio equipment. So instead of becoming an audio engineer, I think I should major in electrical engineering and design them. But in this day and age, I think computers/software would be the way to go. which one should i do?

I think that there is an abundance of computer science people out there. However, how many people do you know, know how to use an oscilloscope? Electrical Engineering is going to be the new Computer Science in 10 years, I think. Computer Science had its time during the dot com boom. It's downhill from here.

Q:definition

*Many electrical installations have a relatively high earth impedance. This may be due to the use of a local earth rod (TT systems), or to dry local ground conditions. These installations are dangerous and a safety risk if a live to earth fault current flows. Because earth impedance is high, 1. not enough current exists to trip a fuse or circuit breaker, so the condition persists uncleared indefinitely 2. the high impedance earth cannot keep the voltage of all exposed metal to a safe voltage, all such metalwork may rise to close to live conductor voltage. These dangers can be drastically reduced by the use of an ELCB or Residual-current device (RCD). The ELCB makes such installations much safer by cutting the power if these dangerous conditions occur. This approach to electrical safety is called EEBAD. In Britain EEBAD domestic installations became standard in the 1950s. In non-technical terms if a person touches something, typically a metal part on faulty electrical equipment, which is at a significant voltage relative to the earth, electrical current will flow through him/her to the earth. The current that flows is too small to trip an electrical fuse which could disconnect the electricity supply, but can be enough to kill. An ELCB detects even a small current to earth (Earth Leakage) and disconnects the equipment (Circuit Breaker). Go through the source links. Also read and seach for residual current device.

Q:(1) source would be from a house and another source would be from a battery [and may not always be on but when on should have priority over the house's power].

Yes, its called 220v. The same thing your stove and dryer are using. be careful its deadly.

Q:Hi. I have bought a kiln from Germany which is compatible with our electrical currents here in the UK - that much I know. It is a small kiln and can be used with just ordinary household electric. However, the electric lead is much thicker than the ordinary leads on my other electrical equipment. Is this just for added safety or what? I want to cut off the German plug and put on an English plug so I need to be sure this is ok. Help from a qualified electrician would be preferable if possible please. Thanks so much.

The heavier wire is to prevent overheating. Cut off plug and wire as normal. Live to the right, Neutral to the left and Earth to the front pin. Luck.

Q:and can they be prosecuted? (UK)

Most electrical or electronic equipment is governed by a user honesty system where if the interfere with other equipment they are required to fix it. Especially if it is ham radio or CB radio. If it is a sewing machine or other home electrical item ring your communications dept. and they will take care of it. Sewing machines can be quite noisy as far as signals and interference go. As far as prosecution is concerned, that won't be up to you. The relevant dept will make that call based on what sort of equipment they are using. I think you should find out which dept. is in charge of radio signals and the like and talk to them. Good luck VK3FMPB

Q:I am trying to work with an opamp

McMaster-Carr is a good place for general electrical equipment

Q:I just arrived at my cousin's house. He makes his own lamps and things. He uses batteries and circuits and lightbulbs, basically, living in a battery-lit home. Being ridiculously green, he claims its more energy efficient than using the city grid. We got in an argument about global warming, and in short he claimed he was helping by using battery power rather than electrical power. I said that wasn't accurate because batteries, lightbulbs, etc use more power than the grid does because they have to be made using electrical equipment in an electric factory. Am I right? What uses more power?

This debate depends on a few things such as how are the batteries charged, the cost of building the ciruits that operate the devices, the cost of electricity and other factors which I cannot think of right now. Also, are the batteries rechargeable? I would assume so in this case. I suspect that it would take a indeterminate period of time (at this point) for there to be a payoff for a battery run home to be less expensive that a conventionally powered home. Part of a conventionally powered home possibly being cheaper in the beginning would be the mass production of devices. When your cousin says things are powered by batteries, is it a battery bank supplying a converter of DC to AC or are his devices running soley on DC supplies? The best way to resolve the answer is to calculate all the electrical costs that go into powering his home and then also calculate how much it would be to run a similar home on the grid. There might also be a few costs that are left out due to their choices of what to leave out of their home or how they accomplish or forego the luxury of in their home. At this point, there are probably not enough studies available to get a general consenus of which is cheaper. There is also another point to consider which is how often do they have to replace their batteries?