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You have 3 sets of conduits with 6 500MCM conductors in each one what is your ampacity?
Wiki User
∙ 14y ago
The ampacity of 500 MCM R 90 degree wire is 395 amps. Don't forget to de-rate the wire as there are more that three conductors in a raceway.
Wiki User
∙ 14y ago
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Five 8 aluminum conductors with THHN insulation are to be routed through a conduit found in a boiler room with an ambient temperature of 75 degree C. What would be the ampacity of each conductor?
#8 aluminum thhn 90 degree wire is rated at 30 amps. Remember to de-rate the wire for more that three conductors in a raceway and the second de-rate for the ambient temperature. Most students miss the de-rate for more that three conductors in a raceway.
Can you use aluminum service cable to feed a sub panel?
Yes, as long as it has the necessary ampacity for the load and is properly fastened at each terminal. For example, we have a 4/0 aluminum cable feeding our 200 A subpanel 120 feet away.
Are lead and tin good conductors if so why?
Lead and tin are good conductors, as are all metals. That is a result of the metallic bond, in which the constituent atoms in a piece of metal share their electrons with each other in the form of a cloud of electrons, all of which can move very freely and are not attached to any particular atom or region.
What wire on a 3 line wooden pylon is live neutral and earth?
If you are referring to a high-voltage line, then it will be a three-phase system, where each of the three conductors is live.
What is difference between core cable and pair cable?
The term core represents each individual conductor within a cable, and a pair is two cores (or two conductors) within a cable. For example if you have a 3 core cable, then the cable has 3 separate conductors in it (3 separate cables within the PVC coating). A 3 pair cable would be 3 sets of 2 cores, so this would have 6 conductors within the cable.
What is the ampacity of each five no 8 aluminum conductors with thhn insulation being routed through a conduit with ambient temperature of 75 Celsius?
School question. The answer can be found in your electrical code book.
Five 8 aluminum conductors with THHN insulation are to be routed through a conduit found in a boiler room with an ambient temperature of 75 degree C. What would be the ampacity of each conductor?
#8 aluminum thhn 90 degree wire is rated at 30 amps. Remember to de-rate the wire for more that three conductors in a raceway and the second de-rate for the ambient temperature. Most students miss the de-rate for more that three conductors in a raceway.
How many conductors does a POTS line use?
Each telephone line uses only two conductors.
What wire size is needed for 1800 amp service?
There is no one wire that is rated for 1800 amps. The service will have to be a quad parallel of the conductors. A 600 MCM conductor with an insulation factor of 90 degrees C is rated at 475 amps. This conductor paralleled into four equal lengths will give an ampacity of 1900 amps for each leg of the service.
What is the function of wires in transmission line?
Each of the three conductors of an electricity transmission system are termed 'line conductors', and there is a potential difference between each pair, called a 'line voltage'. The conductors themselves carry load currents called 'line currents'.
Is a fifteen Amp circuit breaker on a one hundred Amp panel actually de-rated to allow only twelve Amps?
when adding up loads for sizing other conductors such as mains and main breakers, you assume each receptacle circuit is loaded at 80% of circuit ampacity. for a 15 amp circuit, 80% is 12 amps. but you can use all the ampacity you want til you start tripping breakers. if you know ahead of time in designing an electrical service that 80% isn't a good assumption, then by all means, make it bigger.
Why are conductors important?
Orchestra conductors are important because they keep all the musician in sync and on time with each other. If you're referring to conductors of electricity, they're important because they let electricity flow.
What is transposition of a transmission line?
The balancing effect on account of irregular spacing of conductors can be avoided by changing the position of the conductors at regular distances. this is called transposition of conductors. In case of 3- phase transmission lines, the inductance and capacitance of each phase will be different if the three conductors are spaced differently (each phase to the other two phases, and each phase to ground). the apparent resistance of the conductors is also affected on account of transfer of power between the phases which occur due to mutual coupling. so all the three parameters of the transmission lines are affected by irregular spacing of the conductors.
Why do two parallel conductors carrying current in the same direction attract each other while two parallel conductors carrying current in the opposite directions repel each other?
because of their magnetic field lines
What is the difference between bundled conductors and composite conductors?
Bundled conductors are used to reduce the effect of corona. As in place of a single conductor. two conductors are used in parallel the voltage gradient build up is less and thus the ionisation of the surrounding air is decreased. Therefore the effect of corona is reduced.
How do charged conductors and insulators differ from each other?
Insulators prevent electricity or energy from going through them. Conductors allow electricity/energy to easily pass through.
Why are certain metals good conductors of electricity?
They are good conductors of electricity because the outer electrons in each atom can easily come and go called a free flow of electrons.
