Should the white wire be hot?
Should the white wire be hot?
White wires augmented with red or black tape or markings are used as hot; however, a black wire can never be used as a neutral or ground wire, or for any purpose other than to carry a live electrical load.
What happens if I wire a light backwards?
The fixture still works if you reverse the wires, but the socket sleeve will be hot, and anyone who touches it while changing a bulb can get a shock. When wired correctly, the socket sleeve is neutral and only the small metal tab at the base of the socket is hot.
What is voltage load?
An electrical load is an electrical component or portion of a circuit that consumes (active) electric power, such as electrical appliances and lights inside the home. The term may also refer to the power consumed by a circuit. This is opposed to a power source, such as a battery or generator, which produces power.
What are two types of loads?
The types of loads acting on structures for buildings and other structures can be broadly classified as vertical loads, horizontal loads and longitudinal loads. The vertical loads consist of dead load, live load and impact load. The horizontal loads comprises of wind load and earthquake load.
What is full load voltage?
The terminal voltage when full load current is drawn is called full load voltage (VFL). The no load voltage is the terminal voltage when zero current is drawn from the supply, that is, the open circuit terminal voltage.
Why EMF method is called pessimistic method?
In EMF method, the voltage drop due to armature resistance (Ra) and the drop due to synchronous reactance(XS) is considered, both the drops are emf quantities. This method is also called pessimistic method, because the voltage regulation obtained by this method is more than the actual value….
Can voltage regulation be greater than 100?
The efficiencies of step-down converters are typically more than 90%, and in high-voltage systems (Vin > 100 V) they can be as high as 98%.
What is the difference between no load and full load?
In simple words, full load of a machine is the rated power output as per machine name plate whereas no load means zero power output. At no load, power output of the motor is zero, but the motor takes a little input power to feed the losses within the motor.
What is meant by full load?
The full load of a power supply refers to the maximum operation ratings of the power supply. If it is supplying the rated current (same as maximum current) at the rated voltage, then the load that is connected is the full load. Leaving an output without a load on it will cause this to happen.
What is the no load current of a motor?
Motor no-load current is nothing but a measuring the motor current without connecting any mechanical loads in short form “shaft will be driven by hand freely”. Also at no load, the power factor becomes very poor. Since motor draws high reactive current rather than the active current.
Why dc series motor should never be started on no load?
A series motor should never be started at no load. With no mechanical load on the series motor, the current is low, the counter-EMF produced by the field winding is weak, and so the armature must turn faster to produce sufficient counter-EMF to balance the supply voltage. The motor can be damaged by overspeed….
What will happen if back EMF of a DC motor suddenly vanishes?
What will happen if the back emf of a DC motor vanishes suddenly? Explanation: If back emf vanishes suddenly, motor circuit will try to retain back emf by drawing more current from supply. If supplying unit didn’t trip down by this time, excess current in armature may heat up the armature. 3.