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โˆ™ 2012-08-28 21:27:16
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A wave has a frequency of 250 hertz what is the period of the wave

In which material does sound travel the fastest

In this type of wave particles of the medium vibrate perpendicularly to the direction of the wave itself

A 5 ohm resistor a 10 ohm resistor and a 15 ohm resistor are connected in series to a 120 volt power source What is the amount of current flowing between the 5 ohm resistor and the 10 ohm resistor

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Q: What should you do if electrical cables become nicked or frayed excessively?
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What are the most common types of electrical faults in domestic system?

Damaged or frayed wires that can cause shocks or short circuits, loose wire connections that cause sparking, overloaded circuits that consistently trip breakers and overloading extension cords beyond their rated capacity.


Is safe working load of rope same as breaking strain?

No. There should always be a margin between safe working load and breaking strain, in case the load is heavier than you thought, or if the rope is beginning to get a bit frayed and worn.


Why does the neutral run hot and burn?

Is this question asking about a neutral in a single-phase or a three-phase service?Answer for a single-phase serviceIf it is in a single-phase service the neutral wire could run hot because it is overloaded and the circuit breaker has not tripped to cut off the current? That could happen if the ampacity of the breaker is either too big for the application or because the breaker itself has a fault.Another cause could be that the neutral wire has been damaged or has become frayed so that it overheats when carrying the full amount of current - drawn by the appliance from the hot wire - back to the power station.Answer for a three-phase serviceIf this question is asking about a three-phase Y-connected service then the neutral wire will run hot if there is an imbalance of currents drawn by the load from the 3 incoming service lines or one of the lines has become disconnected from the load.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 JOBSAFELY AND COMPETENTLYREFER THIS WORK TO QUALIFIED PROFESSIONALS.


Is AC or DC safer?

There are two methods of powering equipment with mains power supplies. One is to take the AC mains voltage directly into the device at 110 or 230 volts. The other is to convert the mains voltage to a low voltage DC level, typically 5 to 30 volts using a mains adaptor. In this situation, the DC voltage is safer because the typical voltages are too low to be hazardous. For a given voltage above 50 volts or so, AC is generally considered to be safer than DC. Inadvertent contact with an DC voltage can cause muscles to spasm, making it hard or impossible to move away from the contact. AC, on the other hand, is continually passing a zero voltage point, so allowing a short time to move away from the contact point. Although it is rare in a domestic situation to find high DC voltages, they can be present in some equipment. A high powered audio amplifier can have voltages as high as 120 volts DC. The voltage presents no hazard unless access is gained to the inside of equipment. Inadvertent contact with 120 V DC causes more pain compared to a similar AC voltage simply because the contact will tend to be longer. Make no mistake, coming into contact with either is an unpleasant experience at best. There is no need to worry about high voltages as long as cables and equipment are kept in good condition. It is important to make sure that equipment enclosures are not damaged and that the insulation of cables are not frayed or worn.


What is the difference between overloading and short circuit?

In simple terms a short circuit is when negative & positive come together I:E a cable (positive)that is frayed touches the ground (negative). A short circuit is also known as a dead short. An example of an overload might be. If the wiring in your car headlights was rated at 20 Amps & you wired driving lights into that circuit, the Amperage draw would go up to 40 Amps Causing the fuse to blow, or if the circuit was unfused, the wiring to burn out.

Related questions

What should you do if the electrical cables become nicked or frayed excessively?

replace it


If the cables become nicked or frayed excessively what should you do?

replace it


Why is frayed cable dangerous?

Frayed cables/wires can cause fires.


What appliances use frayed or damaged electrical cords?

No appliances should be used with a frayed or damaged electrical cord.


Can a frayed electrical cord start fire?

Possible


If you discover a frayed cord on an electrical appliance in your service user home what should you do?

A frayed cord on an electrical appliance should be replaced before the appliance is used again.


Why is a frayed cable dangerous?

Frayed cables can be highly dangerous. If they are weight bearing cables, the fray can cause a loss of integrity and failure of the cable. The fray itself can cause punctures and lacerations. If the cable is carrying any charge, the fray can result in a failure of the insulation and possible electric shock.


Can a iron start a home fire?

absolutely, with a frayed cord or an electrical short in the wire


Are chair lift cables sharp?

No, They are smooth. There are laws the keep the cables from being used if it is frayed . Think about it, If they were sharp they would wear down machines parts quick if they were sharp.


Where do most electrical accidents happen at home?

From poor connections, worn electrical cords, frayed electrical cords and using larger wattage bulbs then authorized.


What is a sentence for the word frayed?

Frayed is a past participle verb. It can be used in the following sentences:The rope was so badly frayed that I couldn't tie it in a not.Cheap clothes can quickly become frayed.Burning the ends of cord is a good way to stop it becoming frayed.


Are electrical cord frayed or cracked?

They can be of they are old or have been abraded. If they are they should be replaced with new cords.

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