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FAQ

I would like to start testing and reconditioning some electrical equipment and I'm wondering what device or devices I can use to out put a specified voltage/amperage either AC or DC.for instance I have an electric motor that needs 5v 20amps, and I require a device that would allow me to plug into a wall outlet and regulate the voltage and amps to the proper levels for testing this device.hopefully that makes sense, thanks

if its AC you can use a variable speed drive or VoltPac but if ur talking DC then u need an adjustable power supply. You can build one or you can probably buy a more stable unit if you have the money to spend.

direct tv came to the house we just moved into and the power went out when he was hooking up a reciever and turns out all our outlets are messed up except two. one is completely dead. one was red on his tester thing and he said that is dangerous--forgot what he said about it and all the other are open ground i guess, and the fuse keeps blowing. is there any way to fix it without an electrician??? my husband knows some electrical stuff thanks

in a typical house, several outlets are connected together serially. this means that if there is just one outlet that has a detached wire on the back of the outlet panel, it would cut power to the others in that chain. the way i figured it out was - turn off the main from the control panel then open up each outlet panel to make sure wires are connected to the screws. however if you don't feel comfortable with electrical, call the electrician. it costs about $40-$60 for a call like this.

According to the Vancouver Sun interview with Gavin;Q: What is the future for waterfront cities like Vancouver?A: You are going to have to put up with rising sea levels; they are not going to go down. But there’s a huge difference between a foot or two over 100 years and a metre or two metres. There’s a lot of waterfront development going on but is it sea-level-rise smart? I don’t know that it is. So don’t put stuff in the basement, have all your electrical equipment on the second floor or on the roof.

In general you should put your electrical equipment above ground level if doing so is convenient. There is little utility in putting it in the basement except that it is out of the way. The wisdom of this is especially true in areas that are flood prone; global sea level rise and other climate change phenomena will affect what areas are prone to floods.

for a store of electrical equipments, I want to create a database for it, what is the data that I should maintain in this database (the names of the columns)?

You need multiple tables. Using int() auto_increment primary keys for linking each section of data you want something like : stock_codes ( id int(6) primary key auto_increment, stock_code varchar(45) unique key, stock_description varchar(45), stock_qty int(6), suppler_id int(6) ) stock_movement ( id int(6) primary key auto_increment, in_date date, out_date date, moved_qty int(6), stock_id int(6), ) It helps to have tables of suppliers details, client details, sales person details, department details etc. If items have possible alternative suppliers you dump the supplier_id from the stock codes and use a link table for the stock id and supplier id to identify each inward transaction. Add tables for any additional information using links from the other tables to co-ordinate the data.

I was thinking of making a video game collection, I allready have a big one but only containing systems and games with CDs. But no collection is complete without the retro NES or SNES or the old school consoles with cartridges. My question is where would be a good place to store them? Because god knows how difficult it is to find a complete set with the box and Manuel and everything so I'll have to deal with just buying the cartridge. If you could help out I greatly appreciate it!

Storage boxes Shoe boxes There is japanese cart boxes on OKorder but expensive and may not fit American carts You google replacement boxes and some people have put up templates of shrunken boxes that hold just the cart

I need some opinions on why do we recycle, computers, tv, cellphones, etc.I know it saves the environment because if we throw it away, it would just end up in landfills but is there anymore reasons?

Why Should We Recycle Electronics

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

If it is, why?

we use this concept in order to bypass the fault currents, as we know that fault currents are of high frequency. and also the equivalent circuit of the earth is the parallel combination of the resistor and capacitor,also capacitor acts as short circuit(i.e of least impedance). Xc1/(2*pie*frequency*capacitance)