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Without knowing the nominal voltage rating, who can tell? <<>> The sizing of cables or conductors is based on the amperage that the conductor can safely carry. The formula for amperage is I = W/E. Amps = 12000/Volts. With out a voltage stated an answer to this question can not be answered. When you calculate the amperage, re-ask your question for a conductor size for a given amperage.
Without knowing the nominal voltage, you cannot determine the load current and, therefore, cannot determine the cable size. <<>> The sizing of cables or conductors is based on the amperage that the conductor can safely carry. The formula for amperage is I = W/E. Amps = 5000/Volts. With out a voltage stated an answer to this question can not be answered. When you calculate the amperage, re-ask your question for a conductor size for a given amperage.
Breakers are sized by the conductors that are connected to them. Conductors are sized by the amperage that the load draws. The electrical code states that a 50 HP 460 volt three phase motor draws 65 amps. The ideal amperage would be taken from the motors nameplate as different motors of the same horsepower will have different amperage's depending on what they are designed to do. The feeders for this motor have to be sized at 125% of the motors full load amperage. 65 x 125% = 81 amps. A #4 copper conductor with and insulation rating of 75 or 90 degrees C is rated at 85 amps. The breaker for this motor is 150 amp or 175 amp fusing or 110 amp time delay fusing.
the welding amperage being used
yesAnswerNo! Resistance is determined by the length, cross-sectional area, and resistivity of a conductor. Resistivity is, in turn, affected by temperature -so temperature indirectly affects resistance.These are the only factors that affect resistance. Voltage and current have no direct effect whatsoever on resistance. Current can affect resistance indirectly if it causes the conductor's temperature to increase.For AC circuits, 'skin effect', due to frequency, causes the current to flow towards the surface of a conductor which acts to reduce the effective cross-sectional area of that conductor. So, frequency can also indirectly affect resistance.
The amount of current flowing through a conductor is governed by the amperage of the connected load. This is why there are different sizes of conductors. Each conductor size is only allowed a specific amount of amperage to flow through it. If the amperage load is higher that what the conductor is rated for then the next larger size conductor has to be used. The limiting of the amperage to specific size conductors keeps the conductor from heating beyond the conductors specifications, under full amperage conditions.
Yes, there will be a de-rate applied to this type of installation. In the electrical code book the amperage rating of conductors is for allowable ampacities for not more than three copperconductors in raceway or cable. This is based on an ambient temperature of 30 degrees C. If the ambient temperature of the conductors where the raceway is installed is over 30 degrees C the conductor amperages have to be reduced. Where the number of conductors are from 4 to 6 conductors in a raceway, the conductors amperage has to be reduced by .8
Without knowing the nominal voltage rating, who can tell? <<>> The sizing of cables or conductors is based on the amperage that the conductor can safely carry. The formula for amperage is I = W/E. Amps = 12000/Volts. With out a voltage stated an answer to this question can not be answered. When you calculate the amperage, re-ask your question for a conductor size for a given amperage.
If you want to operate the conductors maximum capacity, the conductor needs the heat, that the amperage produces, to be dissipated. This is why in the electrical code book there are two amperage ratings. The first one is for a free air rating which allows for a high ampacity of the wire. The other rating is for three conductors in a conduit which confines the cooling capacity and so the ampacity rating of these wires is lowered. The same procedure is used in cable spacings in ladder tray networks.
LRA (locked rotor amps) is not used to calculate the breaker size. Breaker's are used to protect the size of the conductor that is connected to it. Motor calculations are based on the motor's FLA (full load amps).Conductor size is 125% of the motor's FLA.Breaker size is 250% of the motor's FLA.This is the only occasion when the breaker is sized larger that the conductors maximum amperage rating. This is due to the motor drawing up to 300 to 600% of its FLA when starting.If you state the motor's wattage, voltage or amperage this calculation can be calculated here.
Without knowing the nominal voltage, you cannot determine the load current and, therefore, cannot determine the cable size. <<>> The sizing of cables or conductors is based on the amperage that the conductor can safely carry. The formula for amperage is I = W/E. Amps = 5000/Volts. With out a voltage stated an answer to this question can not be answered. When you calculate the amperage, re-ask your question for a conductor size for a given amperage.
An amperage is the electric current's strength carried by a conductor or machine generated as measured in amperes.
Cable doesn't conduct power, it conducts current. Either the voltage and load must be known or the amperage the cable will need to conduct to determine the size of the cable. Once the amperage is known, there are multiple tables online that have cable size and amperage. Do a Google search for "conductor amperage" for examples.
The only difference in the ampacity of the conductors that go through the house meter would be based on the sizing of the conductors. There are two sets of amperage tables in the code book. One is for aluminium conductors and the other is for copper conductors. If the house meter is for example rated for 200 amp distribution, a 3/0 copper conductor rated at 225 amps would be used or a 4/0 aluminium conductor rated at 205 amps would be used. The aluminium conductor is one size larger than the copper conductor.
Sizing of ground conductors is based on the load capacity in amps of the generator. There is a table in the electrical code book which states an amperage and what size ground wire that is needed for that amperage.
Voltage and resistance determine amperage, assuming the source can provide the amperes.
The larger the number of the wire, the smaller the amperage that it can carry using the AWG wire identification system.In the electrical trade the smallest building conductor that can be used is a #14 copper conductor with an insulation rating of 90 degrees C and is rated at 15 amps.The largest building conductors that can be used is a 200 MCM copper conductor with an insulation rating of 90 degrees C and is rated at 750 amps.The above ratings are for allowable ampacities for not more than three copper conductors in raceway. For amperages higher than 750 amps the conductors then become paralleled, tripled and quadrupled.There are other ratings for conductors such as free air rating (question for another day) but these are the ones used by electricians on a daily basis