AC power outlets connect electrical equipment to the electricity supply in commercial buildings and in other public locations. Different electrical plugs and outlets differ in current and voltage rating, plug type, size, and connection type. Many different standard systems of electrical plugs and outlets are being used around the globe. The number of plugs usually differs according to its size. Some plugs have two arms and others may have three or more arms.

Different residential and commercial structures need different amounts of amps to operate certain appliances. One needs an outlet that can handle the power requirements of the appliance while preventing short-circuits or fire accidents. Residential areas use different amounts of amps for different types of appliances. Large appliances use a lot of amps while smaller appliances need a lower amperage rating. The combination of these two needs is a 20-amp or a 15-amp receptacle.

Home and office buildings usually use electrical construction of one or more outlets in several locations. Widely used wiring system is based on the French model, where outlets are placed according to the floor plan. This allows electricians and plumbers to set up wiring according to space requirements and architectural design. It also prevents the risk of electric shock as the electrician works under the supervision of local safety authorities. Electrical construction can be found in different designs and colors such as white, black, copper, bronze, brass, nickel, and chrome.

Electrical outlets can be mounted on walls or ceilings and sometimes they are placed above existing wiring. Mounting of outlets is done for aesthetic reasons as well as to conceal wiring. They can be flush against walls or can be mounted on the ceiling or even at the corners of a room. Since outlets are usually placed near water pipes or electrical circuits, water should be regularly and safely drained when needed. In some countries, fire alarms or detectors must be installed in homes in order to comply with electrical safety regulations.

Grounding is the process of keeping electrical outlets from touching each other to prevent short-circuiting. Usually a grounding wire is used to keep outlets away from water sources and fire hazards. However, you should see a figure of how many and what kind of grounding materials are required for your country. You can use steel, copper, PVC, brass, or wood grounding material.

There are three main ways to install or locate electrical circuits within a building. You can use the mains system or the ground Fault Circuit Interrupter outlets (FCICI). If you choose to install the mains system then the building codes for your state will provide you with the details. You can also check with local building codes of your area.