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Pancake raceways.

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Q: What raceway is designed to extend conductors across a floor without embedding it in the floor are called?
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Continue Learning about Electrical Engineering

Why do electric circuits need to use conductors?

Without conductors, electrons do not flow where you want them to flow. An electrical circuit is a flow of electrons.


What size conduit for four 4 cables?

Conduit sizing is based on the number of conductors that are drawn into it. Without the number of 1000 MCM conductors, an answer an not be given.


What is the primary purpose of grounding a raceway?

The ground wire is a low impedance return to the main service. In case of cable failure in the raceway and the cable goes to ground (short circuit), the ground wire conducts the high current directly back to the main service and the main breaker will trip shutting off the fault. Without the ground wire, the fault would have to return through the raceway or building structure in metal buildings which have mechanical connections which could be of high resistance.


Does the code permit the ampacity of switch legs to be less than the ampere rating of the branch circuit?

No, and here's why: the rating of the branch, determined by the overcurrent protection, is designed for the ampacity of the branch conductors so that they breaker trips before the conductors heat up enough to start a fire. If you put in smaller wires on the same branch, they will get MUCH hotter before the circuit breaker trips, if it ever does. For example, a 20A branch, protecting 12AWG wiring; add some 14 AWG rated for 15A. Something faults the switched leg at 18A; enough to burn out the wiring but not enough to trip the breaker. House burns down, insurance doesn't pay because of "faulty wiring" installed negligently by a person without proper training and credentials.


Is it possible to convert 220 v wiring to two 110 v wiring?

You will need a 220 volt primary isolation transformer with a split, center taped, secondary 220 volt winding.-------------------Answer for USAIf you live in the United States and your 220v circuit is a 2-pole circuit, you replace the 2-pole breaker with 2 individual 110v breakers and **PRESTO** you are now ready to run 2 individual 110v circuits.If you wish to use existing wiring, and you have 3 wires plus ground, you have all you need. These 2 circuits can share the same neutral without any electrical danger.Before you do any work yourselfon circuits, equipment or appliances,ensure the circuit is, in fact, OFF.IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOBSAFELY AND COMPETENTLYREFER THIS WORK TO QUALIFIED PROFESSIONALS.

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What isIDMA -Future wireless technology?

without the use of electrical conductors or "wires"


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Super conductors would have zero resistivity. Hence no loss due to joule's heating. So power transmission could be done with larger efficiency. Strong electric current could be passed without hesitation due to zero resistance. Hence intense magnetic field could be produced. With this levitation of trains above the rails and hence fast movement of trains. With magnetic propulsion technique satellites could be launched without using rockets. In computers for storing a vast memorable information super conductors could be used. Even generators of several mega watts but of smaller size could be designed.