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What is the short circuit current rating for single core cable clamp?
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How long for a cable to heat up at maximum current rating?
It depends on the surround material, temperature, type of cable, and what you mean by "maximum current rating". Typically a maximum load current rating will be specified, such as 15A; this means you can push 15A through that cable nonstop without damaging it (it won't overheat). You might have a short time rating as well, such as a 4 hour rating, where the cable can handle runing 22A for 4 hours if the surrounding temperature is kept to some value, though this may slightly degrade the insulation. There's also a fusing current rating for many cables. At this current, the cable will eventually melt (like a fuse).
What is the voltage drop for a240 volt single phase circuit 320 feet long. what is cable size required?
Not enough information. To answer this question the amount of current in AMPS the circuit is drawing is needed.
Which method of installing cables ensures the highest current rating for each cable size?
Cables spaced apart on cable ladder, shaded from sun
Can one use 1 circuit of a 3 wire plus ground 2 circuit cable as a GFI circuit with the other as a lighting circuit?
A GFCI can not be used on a three wire branch circuit. It has to be on a single two wire circuit.
What is the cable size for 600V 3 phase ac motor?
you need the current of motor or the KW/HP rating
Why single-core cable armoured with steel wire or tape must not be used for a c circuit?
Current in the single core cable would induce a magnetic current in the steel cable, though a transformer effect. This would heat the steel armored strands, and the circuit would increase more electrical power from the load supply point. The earthing of the cable glands would complete the circuit and the return current would flow in the earth bonding cable between the two points. This is called Eddy currents generated in the cable by the twist of the steel armored around the central core, current flowing in one direction
How long for a cable to heat up at maximum current rating?
It depends on the surround material, temperature, type of cable, and what you mean by "maximum current rating". Typically a maximum load current rating will be specified, such as 15A; this means you can push 15A through that cable nonstop without damaging it (it won't overheat). You might have a short time rating as well, such as a 4 hour rating, where the cable can handle runing 22A for 4 hours if the surrounding temperature is kept to some value, though this may slightly degrade the insulation. There's also a fusing current rating for many cables. At this current, the cable will eventually melt (like a fuse).
What is the voltage drop for a240 volt single phase circuit 320 feet long. what is cable size required?
Not enough information. To answer this question the amount of current in AMPS the circuit is drawing is needed.
What is current rating of 1.0 1.5 2.5 and 4mm2 cable?
4mm2
What are the possible short circuit current rating of cables for different high voltages?
The short-circuit current rating of a cable is the thermal energy it withstands in the short time (normally berween 0,2 and 3 seconds) a short-circuit holds out, till it is limited by the opening of a circuit breaker or the melting of a fuse. This thermal energy strain is characterized in electrical engineering by the product I2t. It order to make this rating independent of the cross section A of the cable, we prefer to replace I by the normalized intensity strain I/A. The modified thermal withstand becomes now(I/A)2t. In this form it depends only on the conductor material, inversely on the initial temperature of conductor before the short circuit and directly on the final temperature of conductor after the short circuit. The last two temperatures depend on the material of the cable's insulation and on the normal operating current of the cable. All these are embodied in a factor K so that (I/A)2t=K. We can find values of K in form of tables or formulas in technical literature. According to the international standards, the coefficient K takes on the following values where K [(A/mm2)s1/2]:K=115 for copper conductors with PVC insulationK=135 for copper conductors with insulation XPLE or EPRK=74 for aluminum conductors with PVC insulationK=115 for the connections of copper conductors with tin solder The short-circuit rating of a cable is useful because we must compare this rating with the specific let-through energy I2t of the overcurrent protective device in correspondence with the maximum short-circuit current of the installation. If it is smaller, it is quite possible under short-circuit conditions that the cable will be damaged, although the protective device will open the faulted circuit without damage to itself.
WHAT ARE THE RATING OF RING MAIN UNIT?
The normal rating of a UK ring circuit in a domestic system using 2.5 mm2 cable in a ring is 30 amps.
What is the current carrying capacity of a 16mm single cable?
64 AMPS
What part of a circuit is the wire cable or switch?
Wire is the transition material used to carry the electric current; the switch is the controller of that current.
Which method of installing cables ensures the highest current rating for each cable size?
Cables spaced apart on cable ladder, shaded from sun
How do you calculate appropriate circuit breaker in the circuit for ac voltages?
It is depending on : whether the ac power is 110 or 220 v , length of wire/cable from mains to CB(circuit breaker),diameter of wire/cable consumption of circuit ( How much watts the circuit consume) i.e load .. don't forget this relation I=V/R . where I= current (amps) , V=voltage & R= resistance also I=P/V where P is power in watts . note that less voltage or thinner wire may affect the real rating of CB
Can one use 1 circuit of a 3 wire plus ground 2 circuit cable as a GFI circuit with the other as a lighting circuit?
A GFCI can not be used on a three wire branch circuit. It has to be on a single two wire circuit.
What is the current rating of 25mm 4-core armoured cable?
You have to be specific. whether the conductor is aluminum or copper. Current carrying capacity will be different for these two types. Copper cable can take more load than aluminum cable for same diameter.
