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Why Cable gets heated when current flows more than its rated current why?
Wiki User
∙ 13y ago
Because if the rated current is lower than the actual current, it causes resistance to the electrical flow which in turn is dispelled as heat.
Wiki User
∙ 13y ago
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What is short circuit ratio of an alternator?
Short circuit ratio is the ratio of field current required for the rated voltage at open circuit to the field current required for the rated armature current at short circuit
What are the ratings and certificates for Only in America with Larry the Cable Guy - 2011?
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You are trying to split cable into my son's room We have digital in the room you are splitting from I don't want digital is his bedroom Is it possible to do this and just get the basic channels?
If his TV is cable ready and your cable company offers basic cable with out a cable box then just use a cable rated splitter and run the cable to his TV without a box he will only get basic and probably advanced basic. You need a cable box or a TV with a built in decoder to get digital signals.
How do you reduce spike current?
by using capacitor on the line we can reduce spike current or we can use a capacitor bank for the rated line capacity.
Size 134 kva cable?
It depends on the current, not the power. There is insufficient information in the question to answer it. Please restate the question.
Can instrument tubing be ran in cable tray?
you need cable tray rated wire to use in a cable try a cable tray is basically open to air so the current rating of the wire doesnt need to be reduced if you have more than 4 conductors cable tray rated tubing is fine( temperature flammability) steel or copper is fine.
How many amps is 6mm cable rated at?
6mm2 cable is rated at 40amps
Why is it dangerous to pass to much current through the mains cable?
Current or AMPS are what the appliance draws or load of the appliance. So, if you have a say 10,000 amps going thru a cable rated for say 1,000 amps , guess what ,the cable over heats and either will melt or at least catch fire.
When is wire size an electrical hazards?
Wire size becomes an electrical hazard when it is under rated for the amount of current (Amps or I) it has to carry.Current is the flow of electrons in a circuit. If the current is too large for the cable, the cable will be subject to heating, which is a possible fire hazard.
What is the difference between rated current full load current?
rated current is the current at any given conditions......but full load current is the maximum current that the system design can hav.....it w'll b larger than that f the rated current. rated current is the current at any given conditions......but full load current is the maximum current that the system design can hav.....it w'll b larger than that f the rated current.
How do you check which cable size is suitable for 4 KW motor?
Cables are rated are by the max current they can supply. To work out the current load you need to divide the Watts by the Voltage (which is either 120 or 240 depending on where you are). In the UK: 4kW/240V = 4000/240 = 16Amps, so the cable would probably be rated for 20 amps. In the US the current is 32Amps, so the cable would probably be rated for 50 amps.
Can you use an existing 300 volt cable to wire in a dryer plug?
The voltage insulation rating is not the factor that cables need to determine how much current that a wire can carry. Most home wiring is rated at 300 volts. A 3C #10 cable is rated for 30 amps. This is the cable that is usually used on dryer connections.
What is the derating?
Derating factor depends on ambient temperature & how u r laying the cable ie., in Air,Duct,Burried. normally the current carring capacity of a perticular cable is calculated at 40*c, but if u lay the cable in air then it includes the temparture around it,if it increases more the 40*c then the conductor gets heated up by increasing the resistance in it thus the current carring capacity of a given cable decreases, so we will derate the cable The derating factor of induction motor is the ratio of the calculated output power to the rated power
Why we go for bus bar riser system instead of cables?
It is done to carry more current at rated power & to reduce the power loss as compared to cable since a bus-bar has more area compared to cable so resistance is less & hence losses are reduced. It is done to carry more current at rated power & to reduce the power loss as compared to cable since a bus-bar has more area compared to cable so resistance is less & hence losses are reduced.
What are some well rated hotels in Cable?
Some of the best well rated hotels in Cable include the following hotels: Cable Mountain Lodge, Cable Beach Club Resort and Spa, and the Cable Car Court Hotel.
What will happen if you stop the rotor and supply is continue in induction motor?
This is done under blocker rotor test of induction motor in which the rotor of the motor is stopped by some external mechanical means and the supply is increased slowly from the autotrasformer until the rated motor current is reached and the V , I ,W readings are taken . As the rated current flows the winding temperature increases but upto rated current this temperature rise is within the safe limits . In the blocked rotor condition the rated current is achieved at around 20-25% of the rated supply voltage . If we further increase the voltage then the current flowing is more than it's rated or permissible value so windings get dengerously hot and they get burnt or damaged .
