Whether you are considering a backup power system, want to add another electric circuit, or are going to install a new appliance, it is important to understand the home`s electrical wiring basics and applicable codes. First, let`s briefly review how electricity gets to your house. Most residential and light commercial homesin U. S. have a single-phase
Click here to download the full size of the above Circuit.
3-wire 120V/240V service. Itconsists oftwoinverted relative to each otherlines and a grounded neutral. Connecting an electric load betweenany line and the neutral yields 120 volts AC. Connecting between both lines yields 240 volts AC (see the diagram). The two 120V buses are derived from a step-down distribution transformer, which isusually mounted on a pole. Its secondary winding has a grounded center tap connected to neutral wire. The two endterminals are electrically hot with respect to the neutral. Note that both lines are derived from the same utilityphase. That`s why such configuration is often called split phase. The threeconductors go from the pole toyour electric meter. From the meter they run to the panel containing the main service disconnect. From there thelines go to magnetic circuit breakersthat protectindividual branches. The branch breakers can be mounted in a separate distribution panel or can be incorporated into the main panel. The individual outlets in the homes are normally NEMA 5-15R duplex. The National Electric Code (NEC ®) 2014 specifies ten locations in dwelling units where the outlets should have GFCI (article 210. 8). Particularly, GFCI should be in bathrooms, garages, kitchens, etc. The article 210. 12 additionally requires special arc-fault circuit interrupters (AFCI) for most types of rooms. Of course, if you don`t touch it you are not required to upgrade, but if you modify, replace, or...
This project fits more for custom made battery casing that can have more space to hide things inside. This switch with few alterations can be used for any other project as well but is designed based on e-bike needs! This project use a clever functionality of....
The circuit described here uses ultrasonic oscillations and operates based on the propagation velocity of these oscillations in the air. Thus, we can easily determine the distance of two points if the time within which the wave travels this distance is....
Sometimes the precious metals are hidden too deep and are not detected except with complicated devices. In many cases, however, small pieces of precious metal buried near the surface can be detected by relatively simple means. Everyone is very attractive to....
Many times for various reasons we forget or can not water the plants that we have in our homes. And many humidity sensors units just notify us with a beeping sound or with a flashing light, that the pot needs watering. But what if we are away from home? This....
The principle behind a metal detector is really very simple. Proof of this is the circuit that follows, in which it proves that the construction of a metal detector can be done in the minute, with few components that we find very easily everywhere. With the....
The sub-harmonic bass generator is a sound producing unit for guitars. The sound it produces looks very much like that of the bass guitar. The octave generator is sometimes quite unusual since it does not produce any of the usual ways of coloring the sound,....
In the past the sounding (sea bottom measurement) was done with the "bullet", that is, with a heavy lead object that the seamen plucked into the sea hung from a calibrated rope. As soon as the "bullet" reached the bottom, the depth appeared directly from the....
This Amplifier was designed to have the following specifications: Distortion less than 0.1% at full power of 100W even at 20KHz. Power has to be attributed to an extended bandwidth. The output transistors must be protected against short circuits. The power....
A series of LEDs serve to alert the gardener when plants need water. Using two conventional digital integrated LEDs and a series of LEDs, we make a very useful device for gardening. The device detects the amount of water in the pot and alerts the grower.....
characters left: