Electrical Wiring

There is a big difference between Non-metallic minerals and metallic minerals.Metallic minerals are composed primarily of metallic elements and have a metallic lustre and other properties, such as the ability to conduct electricity. Non-metallic minerals do not have these characteristics

Your body resistance is high- hard to push electrons through.

yes

Wire what?...please be more specific. I really want to help you but the question is too vague.

Tia/eia-568-c

Yes. There is a sign of Speaker/sound on a side DMM. Move the knob of DMM on that symbol. Now connect one prob of the DMM on one circuit element & one under that(If you are designing the circuit on PCB or plain board). If a sound come out of that then it means that your circuit element & the portion below that are properly connected.

conductor

Each leg of a three phase motor must have overload protection. There is no minimum. Older magnetic contactors used to only protect two legs but occasions arose out of this configuration that would cause the motor to single phase on an overload condition. The code was changed to stop this condition from happening so now all three legs must be protected.

It depends on your definition of sensitivity. Sensitivity might mean how low a reading the voltmeter can accurately indicate, or it might mean how high the impedance the voltmeter presents to the circuit.

An old Triplett 310 I have can resolve 50 mV +/- 3% at an impedance of 60 KOhms on a DC scale, which by today's standards is not very good, but by standards of 40 years ago was nearly state-of-the-art.

A more modern digital meter I have, a Radio Shack DVM, can resolve 0.1 mV +/- 1% at an impedance of 11 MOhms, which is actually only middle-of-the-road today, but still very usable in many applications.

More cranking power.

The same reason, if your trying to fill up a swiming pool. The more or higher pressure of flow of water will fill the pool up faster... more water in less amount of time. More voltage more flow of electrons in a given time and the higher the voltage the lower the amperage draw or current pull... you could use a smaller wire and not worry about it overheating and failing. theres a lot to take in consideration for the application.

The military uses 24v systems for several reasons. One is for cranking--and when big diesels started using electric starters, those starters were all 24v. (New heavy-duty diesels use 12v starters.) Another is for the radios we used to have. The old AN/VRC-12 series radios (VRC-12, VRC-46, VRC-47 among them) had vacuum tubes in the power amplifiers--the radios were designed in the 1960s, when they didn't have transistorized final amplifiers as big as the Army wanted. Tubes need high voltage to work, and it's easier to get to 350v if you start at 24v than if you start at 12v. The current generation of radio has a transistorized amp in it. The real reason they stick with 24v is commonality: if they went to 12v systems the warehouses full of truck parts, communications gear and everything else that can be used in a vehicle would work on only part of the fleet. They don't want a situation where they issue a troop a 12v radio to install in a 24v vehicle and the radio fries, or where they issue him a 24v chemical agent alarm to install in a 12v vehicle and his whole outfit dies from the nerve gas attack the alarm didn't tell them about.

For large vehicles using a lot of power especially for cranking the engine, 24 v is used because on 12 v the connecting wires would have to be of a heavier gauge . . . copper is expensive.

On an overhead service, during periods of rain, water will run along the overhead service wires. Water would run in to the service riser and in to the top of the meter, the drip loop allows the water to drip off of the conductors instead of running in to the meter.

Galvani, Luigi (1737-1798), Italian physiologist, noted for his studies of the effects of electricity on animal nerves and muscles. Born in Bologna, he was a medical student and later Professor of Anatomy at the University of Bologna. He discovered accidentally that the leg of a frog twitched when touched with an electrically charged scalpel. Galvani's name is still associated with electricity in the words galvanism and galvanization.

motor is single phaseing

I have no manual for my 600, there is a wrench blinking when I first start it up, what does this mean? I have checked all fluids and everything is fine and runs great. just not sure about the blinking wrench in instrument panel.

240 refers to the voltage used in an electrical system. The US uses 120V/240V, while the UK uses just 240V.

watt

It is not just residential that has to be installed right, it is all electrical work that has to be installed correctly. Electricity is dangerous and can do the body a great amount of harm. It is the electrician's responsibility to do the job correctly and foremost to do it like it is stated in the electrical code book. Electrical contractors are being paid by their customers to give them a correctly installed and safe product. The majority of electrical installations are not inspected by an electrical inspector based on the contractor,s good reputation. This puts the onus on the contractor to provide a top grade installation to keep in the inspectors "good books". If you, the customer have any doubts about an installation that has been installed for you, request a meeting with your electrical contractor and the electrical inspector for your area at the site of the installation. At this time an explanation will be given to you about your concerns by the electrical inspector.

208 v. equipment is a little smaller and cheaper, and 208v. is slightly safer to use. However, 480v. runs on half the amperage 208v. equipment does, which means equipment or devices cost almost 50% less to operate.

With respect to energy consumption, the answer above is incorrect. It is true that equipment that operates at 480v does operate at roughly half the amperage vs. 208v, however, it operates at over twice the voltage. Your local power company charges you per kilowatt hour (voltage x amperage), not on amperage alone.

Example, a 208v motor that draws 10 amps would consume (208v x 10a) 2.080 kilowatts per hour.

The same motor on 480v would draw roughly half, 4.3 amps (480v x 4.3a) and would also consume 2.080 kilowatts per hour.

So in terms of power consumption, they are virtually the same. The main reasons one would opt for higher is the fact that you can install smaller wire and you can run longer distances.

It's a ratio that is directly proportional (at least with electric motors/inductive loads). If you were comparing a 240v motor to a 480v motor the ratio would be exact, if a 480v motor draws 5 amps, the same motor on 240v would draw 10 amps.

In 120/208V 3 phase system you have 5 wires: three hots, one neutral, and one ground. You have 208V between any two hots and 120V between any hot and neutral. The neutral is the same as in a single phase system. Clarification: Only 4 wires maximum come from the pole - 3 phases and a neutral, and then only if the transformers are on the pole. The ground is always locally derived from a ground rod(s) and/or cold water pipe ground. Most of the time, only 3 wires come in from the pole - the 3 phases in a Delta configuration (Delta has no neutral). The neutral is then derived from a local transformer connected in a Delta-Wye setup. The neutral is the center connection in the Wye. So, from the utility feeder to the transformer - 3 wires. From the transformer (wherever it is located) to the building service entrance panel - 4 wires. The ground is connected at the service entrance panel, and from there to the rest of the building you would have all 5 wires. Clear? In the US, 208/120 is a standardized mains voltage, but in some parts of the world, the phase-to-phase voltage is 220. In that case, the phase-to-neutral potential (in a 3-phase system) would be 127 Volts, not 120.

If it will physically fit in the space, then yes, the 2700 mAh battery should work fine.

Most 2500's have no real problems. Issues are normally small. Almost all Chevy trucks have mild electrical problems. and ignitions have a tendency to break, but it does not happen to everyone, it happens on maybe 1 out of 10 trucks. I have a 1992 Chevy 1500 ext and it has 190,000 miles on it no major problems that would have totaled the truck.

i have had to replace the water pump 3 times, radiator once, AC/Heater blower once, starter and solenoid once, fuel pump once, and i need to replace the AC/Heater controller.

Mind you it might seam as if a lot of stuff was just breaking off of this truck but that is everything my family has done to that truck aside from regular fluid and filter changes. all in all it is an 18 year old truck, (my grandfather bought it a week after i was born), that has lasted a long time and we foresee it running for many more years to come. and when the time comes we will rebuild it. it is our version of a heirloom.

i hope this has some answer you need,

WM

Phase voltage is equal to the line to line voltage divided by root 3 or 1.732. So 440 L-L/1.732 = 254V. Your phase voltage is 254V.

Voltage is stepped up to higher voltages for transmission in a power transmission system in order to reduce the current required to deliver a certain power and, as a result, to reduce the size of the conductors required.

Remember that power is current times voltage, so increasing the voltage allows a reduction in current for the same amount of power. Also, remember that the size of the conductor is proportional to the amount of current alone.

At the receiving substation, the transmission level voltage is stepped down to a distribution level voltage, typically in the range of 11 to 13KV. It is then stepped down to service level voltages at the local distribution transformer serving a business or a group of residences.