Why do lighting dimmer switches emit audible noise sometimes at very high frequencies despite the fact that home electrical service is just 60 Hz AC?

In the USA there are no specific height requirements for switches based on electrical codes 48" above the floor is common. Switches used for unusual items (not lighting) are often mounted higher than the lighting switches, such as the boiler shutoff. If ADA applies to that occupancy there may be a lower height requirement because of potential wheelchair use. ...

Electrical contractors are responsible for providing the electrical items on a construction project.These include lighting fixtures, panels and switchgear. Also switches and receptacles that power cord-connected electrical appliances, andthe elaborate system of wiring that makes it all operate. ...

Spdt,dpdt,relay,and reed switches are the most common in electrical circuits ...

By the lighting load it carries, in amps.

Electronics involves the behaviors of various components and their interactions to make a desired device or system (e.g. radio, TV, computer...). Electrical involves just power wiring, switches, outlets, lighting, etc. ...

The most common electrical switches are mechanical switches, which make or break an electrical contact when some force, either manual or magnetic, is applied to move the switch to an on or off position. Toggle switches have a lever which is pushed or pulled, like the common light switch. Power windows and locks in automobiles use rocker switches, which rock back and forth when pressed. Keyboard switches are found on computers, washers, stoves and other devices with push controls. Electronic switches are electrical...

A gang switch is an electrical box that contains two or more switches or outlets. Gang switches are very common in public facilities such as schools and hospitals. A two gang switch would be two switches operating different fixtures sharing the same electrical box. ...

There are hundreds of type of switches. In residential homes there is basically 4 types of switches used. Single Pole, 3/Way, 4/Way (intermediate), or various types of dimmer switches. ...

Thermometers, Barometers, filling for teeth, electrical switches.

The electrical switches used in Europe contain a widely spaced, two-pronged interface. Universal adapters can be found in a variety or retail stores such as Walmart or Staples. ...

12 gauge wire is normally used for homes and farms for lighting and receptacles. The wire colors are black, white and green. Red wires are sometimes used in wiring switches. Larger gauge wires are used for electrical ranges, furnances, dryers, hot water heaters and air conditioners. ...

lighting is usually on 15A breakers receptacles on 20A the probability is high that they are not on the same circuit. if they are the same circuit the probability is high that there hasn't been an electrical inspection ...

If you get sparking in an electrical switch there is a loose connection or short in the circuit. The switch should be repaired or replaced. ...

Electrical switches, thermometers, fluorescent light bulbs.

I would guess that something might be jammed in the tracks or it is an electrical issue. Sometimes the connections to the switches are bad, sometimes the switch itself is bad, and sometimes the moter is burned out. Listen to hear if the motor is running, if so, check the track and see if it is jammed. If you don't hear anything you have some electrical tracking to do. VBD ...

How will be the therml conductivity and melting pointin Electrical contact materials used in switches brushes and relays must possess ...

Yes. They are well insulated and have thermal cutoff switches.

Did you check the lamp?

switches are important because they could break the circuit if too much current is being used ,whch could cause an electrical fire ...

single pole switches to turn em on and off neutral to all the lights

In electrical engineering there are many types of symbols used to notate devices. These include symbols for polarity, switches, diodes, and batteries. ...

Electromechanics combines the sciences of electromagnetism of electrical engineering and mechanics. Electromechanical devices are those that combine electrical and mechanical parts. These include electric motors, loudspeakers, some fire alarms and mechanical devices powered by them, such as calculators and adding machines; switches, solenoids, relays, crossbar switches and stepping switches. ...

i have know idea why it is used so don't ask mwa (me)

wires circuit breaker switches resistance

Electromechanical control relays are basically switches that are operated by electromagnets. The switches and magnets are integrated into a single package. There are many different contact arrangements on these switches, along with many possible electrical ratings for the magnets ...