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Electrical Wiring
Ask questions here about proper wiring and electrical installation here.
4,935 Questions
Who was president when Bell demonstrated the phone?
Ulysses S. Grant was the President when Alexander Graham Bell demonstrated the telephone. The demonstration took place in June of 1876.
Why do people buy cell phones?
Cell phones are so readily available due to high public demand for the product coupled with the ability to secure new customers with annual contracts. The big money is made through the service, the phone works as consumer bait. The basic supply and demand theory applies to this question along with profitable customer aquisition.
How much gold is in an HDMI cable?
Gold is used in electronics for connectors. The only gold in a cable will be the thin plating on the connecting pins of the connector itself. It is used because gold does not corrode and therefore does not suffer from poor connections due to oxidization of the connector surface.
The total amount of gold will be measured in milligrams.
Can you use 110v 60Hz supply for 110v 50Hz equipment?
If the load is non inductive and straight resistive then there is no problem. Inductive loads like motors, a 60 Hz device can be used on 50 Hz but it is much harder on the equipment if 50 Hz is used on a 60 Hz system.
What are the two kinds electricity?
Perhaps you are referring to DC and AC? DC is direct current - current flows in a single direction. In AC (alternating current), the current regularly changes its direction.
Perhaps you are referring to DC and AC? DC is direct current - current flows in a single direction. In AC (alternating current), the current regularly changes its direction.
Perhaps you are referring to DC and AC? DC is direct current - current flows in a single direction. In AC (alternating current), the current regularly changes its direction.
Perhaps you are referring to DC and AC? DC is direct current - current flows in a single direction. In AC (alternating current), the current regularly changes its direction.
What Size of wire should I run for 250 feet run for 220 volt electrical?
The first paragraph below illustrates why you should hire a qualified electrician to do your electrical work and not take advice from just anyone.
"well i just the same install and it was recommended i go with a 3 conductor 2/0 aluminum AWG but to be safe with a voltage drop over that distance and a possible large draw for my equitment that i plan on getting in the future plus a rotary 3 phase 20 hp converter i upsized it to 3 conductor 1/0aluminum AWG"
(The next larger size wire would be a 3/0 not a 1/0! This is a good example of why unqualified people should not do electrical work, the answer below is correct).
To answer this question, the amperage of the load at the end of 200 feet has to be supplied.
What is the speed of twisted pair wiring?
This depends on what "type" of twisted pair. Category 5 ( CAT5 ) cable can transmit up to 100 Mb/s, while Category 6 can transfer up to 1 Gb/s ( 1,024 Mb/s )
The most common twisted pair is CAT5, and CAT5e, used in home networks, business networks, and some multi-line telephone lines.
Can a 100 mA adapter be substituted with a 200 mA adapter?
A 9V 1A adapter will supply up to 9 Watts of power and a 9V 200mA adapter delivers up to 1.8W of power. The 200mA adaptor may not be able to supply enough power to a device that has been supplied with a 1A adapter. The 1A adaptor should operate equipment that originally used a 200mA adapter.
Before using a different power supply, check that the outputs are both DC or both AC. If they are both DC, it is important to check that the polarity at the connector is the same for both. If AC and DC supplies are swapped or the polarity is swapped there is a risk that the equipment will be damaged.
How do you increase the signal of a mobile phone?
There is usually no easy way to increase the signal of a cellular phone, although some models have better range than other models. One possible way to increase the strength when you are in a car is to have a "car-kit" which boosts the signal strength and uses an external antenna (on the outside of a car). If this is a critical concern for you, you can probably avail yourself to a "transportable" phone, which operates at a higher power than a standard cell phone, but these are also several times larger and heavier than a standard phone and really only a solution for those who must be able to make calls in fringe areas.
Other tips that will improve your signal is to use the phone outside when possible, the range will be significantly decreased if you are inside of a (metal) car or inside a building. Extend your phone's antenna if that is possible on your phone and hold the phone as vertical as you can. There are always some "dead" areas where cellular signals are weak, obstructed or have significant interferrence, so moving a few meters will sometimes make for a much clearer call. If you have seen the clear stickers with a gold foil "antenna" design and claim to increase your cellular signal, they are a waste of money and have no plausible basis on why you could expect them to help.
A parallel circuit is a circuit where there is more than one path of which the flow of current can travel. It is also called a current divider as it divides the current since it splits the path.
RCA wire, or RCA cable, is a type of electrical cable commonly used to transmit audio and video signals. It features a single connector at each end, typically color-coded in red and white for audio channels and yellow for video. RCA cables are widely used in home entertainment systems, connecting devices like DVD players, gaming consoles, and televisions. Despite the rise of digital connections, RCA cables remain popular for their simplicity and ease of use.
Why is ESD important in the manufacture of circuit boards?
If you do not take ESD precautions when working on a circuit board, or when working with electronic components or assemblies, there is a chance that static charge on your hands or on other places could discharge through one of the components and damage it. Damaging a component means the circuit or assembly or component no longer works correctly, or even worse, will operate normally but will experience a reduced lifetime, ie, fail in the near future.
How much does 500 mcm copper wire weigh per foot?
About 1.5 lb per linear foot.
A Circular Mil is the area of a circle with a diameter of 1/1000 of an inch. The first "M" actually stands for 1000, and "MCM" is interchangeable with "kCM." 500 MCM has an cross-sectional area of 253.4 sq mm (2.534 sqcm, a density of 8.96 g/cc. 1 foot is 30 cm. 2.534*8.96*30 = 692 g = 1.52 lb.
Of course if you're using 500MCM cable you're probably installing it in a 3-phase system, with possibly a full-size neutral, so for total runs, you may have a 3-4 multiplier for a total weight of a single set run.
How much do schools pay for electricity a month?
My mother works at a large, underfunded school, and they pay $11,000 CAD a month.
Will British electrical appliances work in US?
I was a US Government employee. Me and my family were sent to England where we resided for 7 years. We shipped all our household goods with us including all our US electrical appliances. Once there, we purchased transformers which come in various wattage ratings. The transformer actually converts the 220voltage down to the required 120 volts for US products. Anything with a motor would only be turning at 50 cycles a second vise the 60 cycles of US current. This would only affect the playing speed of say a record player (obselete now) but radios, toasters, coffee pots or anything of that nature would work fine. Hope this has helped.
You need a transformer, as mentioned above.
Note that for running UK appliances in the US that is not necissarily true, as the US has 120/240V service. You'd just need a special outlet for your 240V appliances.
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Some, but by no means all, electronic appliances have 110/240V switches to allow use on either system.
What lines send the electricity over nationwide network?
If you mean conductors instead of lines the wire is ACSR. Aluminium Conductors Steel Reinforced.
ACSR is a concentric-lay-stranded conductor consisting of a single core wire or a stranded steel central core with one or more layers of stranded aluminium wires.
Why do you need a shunt trip breaker?
A shunt trip breaker is installed like any other molded case breaker. The only difference is that it has an internal tripping coil that is usually connected to a C.T. The breaker is usually mounted in a MCC cabinet The top of the breaker is bolted to the MCC bus bars and the bottom of the breaker is connected to the load. The load conductors pass through the C.T.'s which induces a current into the circuit to trip the tripping coil in the breaker.
What does 24vac 50va equal to in amps?
In 50 VA the V stands for volts and the A is for amps.
Hence the formula you are looking for is 50/240 = Amps.
What is the proper grounding depth for a rod in wet land?
The wetness of the soil has no bearing on ground rods. Residential wiring requires two 8 foot long ground rods driven flush or just below the surface of the ground. One is mounted under the meter base and the other is mounted 6 feet to either side.
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The CEC (Canadian Electrical Code) requires two ten foot rods placed ten foot apart for the grounding system. The top of the rods are identified by diameter and length stamped into the rods. This is to prevent cutting the rods off if rock obstructions are encountered. If the rod will not pound into the ground any further it is bent 90 degrees and buried horizontally and again bent 90 degrees up to allow the top of the rod to protrude above the ground so as a connection can be made to it. In the new addition of the code it now allows a ground plate to be used as a grounding medium. Only one plate is required as it has more surface area than two ground rods. The plate is buried a one metre deep or a minimum of 600 mm if rock bottom is encountered.
What is rms value in ac system?
The r.m.s. value of an alternating current or voltage is the value of direct current or voltage which produces the same heating effect.
What is the transmission speed of coaxial cable?
from what I've seen, there are many different types of coaxial cables and they all have different transmission rates. From the old days, (90's), TV had a transmission rate of about 768kbits/s, which is now irrelevant because there are cables that can go up to 200Mbits/s (According to what I have gathered here)
Will a 208 volt rated appliance work on a 240 volt feed?
No, there is over a 15% difference in voltage supplies. This means that the current supplied to the 208 volt equipment will also be 15% higher. Take a 4000 watt range. I = W/E 4000/240 = 16.6 amps. 4000/208 = 19.2 amps. A 240 volt appliance will run on 208 volts but as you can see from above equation the range elements will not get as hot at the lower voltage.
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To get a the answer you have to reckon with the resistance of the appliance. A 4000 watt appliance running on 208 volts takes 19.2 amps, so from Ohm's Law R = E/I, its resistance must be 208/19.2 = 10.83 ohms.
Again using Ohm's Law I = E/R, the current that resistance takes at 240 volts must be 240/10.83 = 22.16 amps. So the power drawn will be 22.16 x 240 = 5,318 watts.
If it is a cooking ring or a heater, that power may cause the temperature to rise so much that its element could glow dangerously white hot and, at best, it may then melt or burn away with lots of smoke and heat. If it was some other appliance it may well overheat so much that it simply catches on fire. So the real risk here is that, if left unattended, the higher voltage could cause a house fire.
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As always, if you are in doubt about what to do, the best advice anyone should give you is to call a licensed electrician to advise what work is needed.
Before you do any work yourself,
on electrical circuits, equipment or appliances,
always use a test meter to ensure the circuit is, in fact, de-energized.
IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOB
SAFELY AND COMPETENTLY
REFER THIS WORK TO QUALIFIED PROFESSIONALS.
Which alkaline battery AA and AAA and D and C last the longest?
Consumer reports once stated that the best value battery buy was whatever was cheapest (even generic/no-name brands), because their testing found so little difference between brands.
Duracell because it cost the most. (When it is the most expensive battery the longer it lasts.
duracell
Duracell ,Energiser,Sony,Panasonic,Maplins assuming to power high drain devices
e.g. rc cars mp3s
duraccel
the best number 1 battery mostly recommended is duracell
Energizer has kept a record of being the longest-lasting batteries in energy-consuming gadgets.
That may be true for Enegizer but rayovac is by far the worlds record,
Energizer and Duracell .
Duracell, but you need to get the real ones, because there a re many cheap copies from China all over.
