There is no wire insulation on this earth that can stand a temperature of 658 degrees C (1268 degrees F.).
To calculate the cable size for a 100 kW load, you would need to consider factors such as the voltage of the system, the type of cable insulation, the ambient temperature, and the installation method. The cable size is typically determined by the maximum current the cable will carry without overheating. Using the formula: Cable size (mm²) = (2 x L x I x R) / (√3 x V x cosΦ), where L is the cable length, I is the load current, R is the resistance of the cable, V is the voltage, and cosΦ is the power factor, you can calculate the appropriate cable size for the 100 kW load.
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
The current-carrying capacity of a 50mm² cable can vary based on factors such as insulation type, installation conditions, and ambient temperature. Generally, a 50mm² copper cable can handle approximately 160 to 220 amperes in a three-phase system. For a four-phase system, the capacity may be similar, but it's essential to consult the specific cable manufacturer's guidelines or local electrical codes for precise ratings. Always consider safety factors and derating when planning electrical installations.
The required cable size for a 390 amp load depends on several factors including the type of insulation, temperature rating, length of the run, and whether the installation is in a conduit or exposed. Generally, for copper conductors, a cable size of at least 250 kcmil is often recommended; for aluminum conductors, a larger size may be necessary, typically around 350 kcmil. It's crucial to consult the National Electrical Code (NEC) or a local electrical code for precise calculations and to account for factors like voltage drop and ambient temperature. Always consult with a qualified electrician or engineer for specific applications.
4
No
There is actually no specific formula used to work out cable size. In order to determine the type of cable you need and the size you need, you need to know the source of the supply, the voltage of the system, the ambient temperature, and the method you plan on laying out the cable.
That depends on the refrigerant type and ambient air temperature.
80w-90 if ambient temperature is under 104F or 40C
They are a special type of ectotherm called a poikilotherm meaning they have the same body temperature as their ambient surroundings.
That would depend on the type of battery, and probably also on the ambient temperature.
Examples: type of ilumination, magnitude, type (optical, electron microscopy, scanning microscopy, etc.), working temperature (ambient or high temperature), resolution, etc. See also the link below.
Depends on the type of cable, the method of fixing the cable, the ambient temperature and the way the cable has been run to the motor (i.e in trunking, Conduit) Bascially a cable with a current carry capasity of 2 amps should be fine (1.45 amps with power factor of unity and no de-rating factors). Remember 1mm cable can carry at least 8 amps. Also please improve your English when asking stupid questions!!
Depends on the ambient air temperature, humidity level, and type of refrigerant used.
The amp rating of a 2.5sq mm copper cable depends on factors such as insulation type, installation method, ambient temperature, and specific application. In general, a 2.5sq mm copper cable can typically carry around 20-25 amps of current in a typical household wiring scenario. It is recommended to consult with a qualified electrician or refer to local electrical codes for precise amp ratings.
To calculate the cable size for a 100 kW load, you would need to consider factors such as the voltage of the system, the type of cable insulation, the ambient temperature, and the installation method. The cable size is typically determined by the maximum current the cable will carry without overheating. Using the formula: Cable size (mm²) = (2 x L x I x R) / (√3 x V x cosΦ), where L is the cable length, I is the load current, R is the resistance of the cable, V is the voltage, and cosΦ is the power factor, you can calculate the appropriate cable size for the 100 kW load.
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