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What limits the current that flows through a circuit for a particular appllied DC voltage?
The voltage applied and the resistance across it.
What is meaning for TPN isolator and SPN isolator?
TPN (Triple Pole and Neutral) isolator is an electrical switch used to disconnect three-phase electrical circuits, ensuring that all three phases and the neutral are isolated for safety during maintenance or servicing. SPN (Single Pole and Neutral) isolator, on the other hand, is used for single-phase circuits, allowing isolation of the live wire and the neutral wire. Both types of isolators are crucial for ensuring safety by preventing accidental energization of circuits during work.
Is a ground fault circuit breaker nessesary for a washing machine?
A ground fault circuit breaker essentially senses the difference currents flowing in the incomming & return wire of an electrical supply circuit. In normal cases ideally the difference must be zero or very close to it. Whenever there is a fault & the electrical path also takes any other route e.g a operator who has accidentaly touched any live part of the equipment, there is a current flow imbalance in the input & return path of the electrical supply circuit. This imbalance is sensed & used to trip the main electrical circuit & thereby limits the Intensity & Duration of the Electrical current flowing through the operator. This results in the operator feeing a small jolt instead of a nasty or hazardous electrical shock. From the above it is obvious that ground fault circuit breaker is essential for safety of the operator especially where the applicance is working with water or in watery surroundings & there is every chance of the water or operator accidentally comming into contact with a live electrical circuit & thereby create a safety.
What are electrical contacts?
Two answers for this question. An electrical contact is any point in a circuit that a wire connects to, such as a screw or terminal block. The term is also used when referring to control circuits. There are contacts inside Relays, Ligthting contators, and motor starters. They can be called N.O. for normally open, and or N.C. for normally closed. They "Make" of "Break" and electrical circuit.
Why are electric ranges wired to separate circuit breaker?
As a range is a high current device, the electrical code stipulates that it has to have its own breaker. The breaker protects the wire feeder. An electric range breaker is set to trip at 40 amps. Using a smaller wire that #8 is not allowed as their ratings are below that of the #8 wire. #10 wire rating is 30 amps, #12 wire rating is 20 amps, and #14 wire rating is 15 amps.
