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We provide wide range of electronic toys for all ages. Here you can find all kind of cool stuff and a lot of information about wiring, circuit diagrams, circuit designs, drones, robots, science and nature electronic toys, solar gadgets and DIY kits, educational products and many more. It doesen’t matter how young or old you are, there’s something for everyone. But first let’s start with some basic rules and terms, so you can enjoy all the fun electricity can provide.

Glossary of electrical terms

Accessible: Not permanently concealed or enclosed by building construction.
Accessible, as appplied to equipment: Capable of being removed or exposed without damaging the building finish or structure. A piece of equipment can be considered accessible even if tools must be used or other equipment must be removed to gain access to it.
Accessible, readily: Capable of being reached quickly for operation or inspection without the necessity of using tools to remove covers, resorting to ladders, or removing other obstacles.
Alternating current (AC): Current that flows in one direction and then in the other in regular cycles; referred to as frequency or Hertz.
Apparent power: See power.
Approved: Acceptable to the AHJ. The AHJ will usually approve materials that are listed and labeled.
Arc fault: An Electric current propated through air.
AFCI, Arc-Fault Circuit Interrupter: Device intended to provide protection from the effects of arc faults by recognizing certain characteristics unique to arcing and by functioning to de-energize the circuit when an arc fault is detected.
AFCI, branch/feeder type: An AFCI meeting the standard for interrupting parallel arcs if 75A of current are available at the device.
AFCI, combination type: An AFCI meeting the standard for interrupting both series and parallel arcs, and requiring <75A available current to facilitate operation.
Authority Having Jurisdiction (AHJ): The building official or person(s) authorized to act on his or her behalf.
Bonded, bonding: Connected to establish continuity and conductivity.
Branch circuit: The circuit conductors between the final OCPD (breaker or fuse) protecting the circuit and the outlet or outlets.
Branch circuit, general purpose: Branch circuit that supplies two or more receptacles or outlets for lighting and appliances.
Branch circuit, individual: Branch circuit supplying only one piece of equipment.
Branch circuit, multiwire, residential: Branch circuit consisting of two hot conductors having a 240V potential between them and a grounded neutral having a 120V difference between it and each hot conductor F17.
Branch circuit, small appliance: Branch circuit supplying portable house-hold appliances in kitchens and related rooms and that has no permanently installed equipment connected to it (see p. 18 for exceptions).
Clothes closet: A non-habitable room or space intended primarily for storage of garments and apparel F37.
Controller: A device to directly open and close power to a load.
Derating: A reduction in the allowable ampacity-of conductors because of ambient temperatures >86°F or more than three current-carrying conductors in the same raceway, or cables without spacing between them.
Device: A piece of equipment that carries or controls electrical energy as its primary function, such as switch, receptacle, or circuit breaker.
Equipment: A general term including materials, fittings, devices, appliances, luminaires (fixtures), apparatus, machinery, and the like used as a part of, or in connection with, an electrical installation.
Equipment Grounding Conductor (EGC): A wire or conductive path that limits voltage on metal surfaces and provides a path for fault currents F16.
Flexibility after installation: Anticipated movement after initial installation, such as that caused by motor vibration or equipment repositioning.
Feeders: Conductors supplying panelboards other than service panels.
Gooseneck: A curve at the top of a service entrance cable designed to prevent water from entering the open end of the cable.
Ground: The Earth.
Grounded conductor: A current-carrying conductor that is intentionally con-nected to earth (a neutral).
Grounding electrode conductor (GEC): A conductor used to connect the service neutral or the equipment to a grounding electrode or to a point on the grounding electrode system F6.
Ground fault: An unintentional connection of a current-carrying conductor to equipment or conductors that are not normally intended to carry current.
GFCI: A device to protect against shock hazards by interrupting current when an imbalance of 6 milliamps or more is detected.
GFPE: A device to protect equipment from ground faults and allowing higher levels of leakage current than a GFCI.
Hertz: A measure of the frequency of AC. In North America, the standard frequency is 60 Hertz.
Individual branch circuit: A circuit supplying only one piece of utilization equipment.
In sight: See within sight
Load: The electrical demand of a piece of electrical equipment measured in amps or watts.
Lighting outlet: An outlet intended for the direct connection of a lampholder or a luminaire.
Location, damp: An area protected from weather, yet subject to moderate degrees of moisture, such as a covered porch.
Location, dry: A location not normally subject to dampness or wetness.
Location, wet: All installations underground or in concrete or masonry in direct contact with the earth and areas subject to direct saturation with rain water or other liquids.
Luminaire: (formerly lighting fixture) A complete lighting unit, including parts to connect it to the power supply and possibly parts to protect or distribute the light source. A lampholder, such as a porcelain socket, is not itself a luminaire.
Neutral conductor: The conductor connected to the neutral point of a system that is intended to carry current under normal conditions F17.
Open conductors: Individual conductors not contained within a raceway or cable sheathing, such as a typical service drop.
Outlet: The point on a wiring system at which current is taken to supply equipment. A receptacle or a box for a lighting fixture is an outlet; a switch is not an outlet.
Overcurrent: Any current in excess of the rating of equipment or conductor insu-lation. Overcurrents are produced by overloads, ground faults, or short circuits.
Overfusing: A fuse or breaker that has an overload rating greater than allowed for the conductor it is protecting.
Overload: Equipment drawing current in excess of the equipment or conductor rating and in such a manner that damage would occur if it continued for a sufficient length of time. Short circuits and ground faults are not overloads.
Panelboards: The “guts” of an electrical panel; the assembly of bus bars, termi-nal bars, etc., designed to be placed in a “cabinet?’ What is commonly called an electrical panel or load center is, by NEC terms, a panelboard mounted in a cabinet F16.
Power: Electrical power is the product of volts times amps and can be expressed as either watts (true power) or VA (apparent power).
Service: The conductors and equipment providing a connection to the utility F2.
Service drop: The overhead conductors supplied by the utility F2.
Service entrance conductors: The conductors on the customer’s premises that convey power to the service equipment.
Service equipment: The equipment at which the power conductors entering the building can be switched off to disconnect the premises’ wiring from the utility power source. A meter can be a part of or separate from the service equipment.
Service lateral: Underground service entrance conductors.
Service point: The connection or splice point at which the service drop and service entrance meet—it is the handoff between the utility and the customer.
Short circuit: A direct connection of current-carrying conductors without the interposition of a load, resulting in high levels of current.
Short circuit rating (SCR): The amount of current that a piece of equipment (such as a breaker or switch) is rated to sustain without damage.
Snap switch: A typical wall switch, including 3-way and 4-way switches.
Ufer: A concrete-encased grounding electrode, named after the developer of the system, Herbert Ufer F6.
Unit switch: A switch that is an integral part of an appliance.
Within sight: (also written as “in sight”) Visible, unobstructed, and not more than 50 ft. away.

And one of the most important laws: OHM’S LAW

The rate of the flow of the current is equal to electromotive force divided by resistance.

I = Intensity of Current = Amperes

E = Electromotive force = Volts

R = Resistance = Ohms

P = Power = Watts

The three basic Ohm’s law formulas are:

I = E/R     R = E/I     E = I x R