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Electrical Wiring

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4,935 Questions

Can overcurrent cause an electrical fire?

Yes, if the overcurrent is not quickly detected by a fuse or circuit breaker, the conductors will heat up from the excessive current, causing the resistance to increase, causing more heat, causing more resistance. This "thermal runaway" continues until the heat gets high enough to damage or destroy the insulation (if any) on the conductors, and deform the conductors to the point of separation. Overheated conductors may possibly reach the ignition temperature of adjacent materials, either with the conductor, sparks from arcing, or from molten insulation, resulting in a Class C fire.

When was Foxtel IQ Released?

the Original iQ1 in 2005... 2008 for the iQ2 & 2009 for the new iQ1

Free cable TV?

Cable TV is almost always a commercial service for which a subscription is required. Free cable service, if it's offered, is normally a short term offer with a subscription required in the future.

There are a number of free Internet based streaming services available as an alternative.

Who makes sens TV from circuit city?

The staff at my local circuit city, which is going through a liquidation sale, said it was a Korean firm. I searched the internet, and could not find anything about it. I would say, the risk of buying a product that has not company standing behind it, would make the "deal" not worth while.

What is cyber power model cpsa0526 adaporter used for?

It goes to a cyberpower usb hub. Mine is attached to my pc so I can't give you the model#, but i has 5 ports. Mine is being powered by the pc so I didn't use it and today have been also trying to figure out what it goes to.

What is the primary objective of the Philippine electrical code?

As with every electrical code around the world, the primary objective is the safe installation of electrical equipment that is connected to the electrical grid. Overall the objective is keeping everyone and everything safe in conjunction with the use of an electrical supply source.

Are toshibas good computers?

Toshiba makes decent computer, but recently in my opinion they have been going down hill a bit.

- D.E.F Edit: Since Toshiba does not make their own internals, i.e. motherboard, processor (anything else of importance relating to the machine itself.). The real question to look at is, "do they make decent screens"? The screen is made by Toshiba, but i'm not even sure that the case structure is made by them. I would say that if you're picking Toshiba over an Acer, and they have the same specs, it's going to be just as good as any other pc out there.

How do the characteristics of coaxial cable compare with twisted-pair cable?

Both the coaxial cable and twisted pair cable have a basic connection medium for network cabling.

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Coaxial cable can be used for transmission of RF (radio frequencies) whereas Cat 5 (twisted pairs cable) can not.

Is a dashed DC wire negative?

In most circuits, the wire that isÊ"dashed" on a wiring diagram is positive. The other wire, often unmarked, is the negative one.

Can you describe human successes in five technologies and human failures in five different technologies?

Many technologies can fall into both the human failures category and the human success category. A good example of this would be the light bulb, because Thomas Edison had to fail a large number of times before he succeeded. Human's failures in technologies would be nuclear power, weaponry, medicine, thermodynamics, and genetic engineering. We eventually succeed in all of the categories, but we first had to fail. Man's success in technologies would be wind and solar energy, computers, automobiles, telephones, and portable music players. These technologies were also trial and error before they were a success, but they are always being changed and becoming more advanced, now that they work.

What cable is called for phone Internet and TV?

There are primary two different systems. If it is cable then RG6 cable is used. If it is a LAN then Cat. 5 will be used.

How old do you have to be to buy cell phones?

There is no real age you need to be to buy a cell phone by itself. However to activate the phone with service from a cell phone carrier, you need to sign a contract which in most cases requires you to be 18 years old.

Does a battery last longer in a series or parallel circuit?

A battery doesn't see a series or parallel circuit. It just supplies the current that is demanded by the load be it a series or parallel load. Visualize that a single load across a battery is both a series and parallel load to the battery.

How does a photo copier use static electricity?

A selenium coated drum is electrostaticly charged from a high voltage corona discharge. The charged drum is then exposed to light of an image of the original to be copied. The lighted areas become discharged, leaving only the dark areas still charged. The drum now passes over a tray of dark plastic toner beads, which are attracted to the charged areas of the drum and stick. The drum, with toner stuck to it in the pattern of the dark areas of the original now passes the blank sheet of paper to become the copy and a high voltage pulls the toner from the drum to the paper. Finally the paper with the toner on it is passed through a heated "fixer" that melts the toner into the paper. Now you have a copy.

How do you find the minus on a microphone?

Typical microphone has no volume adjustment, it can be adjusted in electronic device where microphone is connected.

What is the difference between type ac and type act armored cables?

The difference is the type of insulation on the conductors. Type AC used a thermoset

insulation , Type ACT is a theromplactic

insulation.

Which of the tests was introduced in BS 7671-2008?

BS 7671-2008 is the 17th addition of the UK electrical code book. As the tests were not stated by the question an answer to this question can not be answered.

What is a class X current transformer?

Class X CTs are special CTs used mainly in balanced protection systems

(including restricted earth fault) where the system is sensitively dependent

on CT accuracy. Further to the general CT specifications, the manufacturer

needs to know:

• Vkp - Voltage knee point

• Io - Maximum magnetising current at Vkp

• Rs - Maximum resistance of the secondary winding

What type of switch is installed to control a luminaire from two different control points?

A Three-way switch. 3-ways are used to control from two locations. As opposed to a Four-way switch, which is needed to control from more than two locations.

Do telephones use a small amount of electricity?

If your telephone came with a charger then yes it uses a small amount of electricity. This is what the charger does, it replenishes the electricity that the telephone used while not connected to the charger.