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By asking this question you are probably not quite ready to take on this particular task. The correct answer to your question will depend on the exact site location of the light switch and the of the light it is controlling.
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As always, if you are in doubt about what to do, the best advice anyone should give you is to call a licensed electrician to advise what work is needed. Before you do any work yourself,
on electrical circuits, equipment or appliances,
always use a test meter to ensure the circuit is, in fact, de-energized.
IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOB
SAFELY AND COMPETENTLY
REFER THIS WORK TO QUALIFIED PROFESSIONALS.
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Is the pressure switch high Normally open or normally close?
A pressure switch can be normally open or normally closed. It depends on how it was made. The NO/NC should be marked somewhere on the switch. A pressure switch can be normally open or normally closed. It depends on how it was made. The NO/NC should be marked somewhere on the switch.
Why is the main switch connected in series together with the rest of the circuits in the house?
It is connected so that it can disconnect the entire power grid in the house with one switch. This switch is usually integrated into a circuit breaker. No matter how one looks at it, this switch must be made to withstand (and be able to switch) great currents (in excess of 16A) at relatively high voltages (120V/230V). Special care must be taken during the design phase, as the switch will most likely have to suffer severe arcing as well as heating, during normal operation.
How can you wire and control 3 lights from 1 switch?
This is simple. First the wire coming from the power supply go to the switch. Then it goes to the first , the second and the third light. Since the switch comes first all three light will be controlled by that one switch.
Why do ceiling fan lights go out?
Without knowing some more facts, there could be several different answers to explain why a ceiling fan's lights "go out":someone has turned them off at the switch for the lights on the fan unit;the light bulbs are "dead" and need replacing because their filaments have broken;there is a fuse protecting the lighting circuit and it needs replacing because it blew from the surge of high current that sometimes happens when a light bulb "dies";there is a timer in the fan unit which turns the lights off after a certain period of time;the wiring from the switch to the light has become disconnected;the switch in the fan that controls the lights is broken and needs to be replaced...
To moderate the high voltage of currents entering a house from power lines a is used?
transformer YES but transmission is 475kv and distribution is 16kv and finally one phase out of a transformer on a pole or on the ground. An electric switch yard will have transformers to reduce to distribution voltage.
