House electrical wiring is a process of connecting different accessories for the distribution of electrical energy from the supplier to various appliances and equipment at home like television, lamps, air conditioners, etc.
Let us look at the different types of electrical wiring that are used in domestic properties.
5 Different Types of Electrical House Wiring Systems
Cleat Wiring
This wiring comprises of PVC insulated wires or ordinary VIR that are braided and compounded. They are held on walls and ceilings using porcelain cleats with groves, wood or plastic. It is a temporary wiring system, therefore making it unsuitable for domestic premises. Moreover, cleat wiring system is rarely being used these days.
Casing and Capping Wiring
It was quite popular in the past but it is considered obsolete these days due to the popularity of the conduit and sheathed wiring system. The cables used in this electric wiring were PVC, VIR or any other approved insulated cables. The cables were carried through the wooden casing enclosures, where the casing was made of a strip of wood with parallel grooves cut lengthwise for accommodating the cables.
Batten Wiring
This is when a single electrical wire or a group of wires are laid over a wooden batten. The wires are held to the batten using a brass clip and spaced at an interval of 10 cm for horizontal runs and 15 cm for vertical runs.
Lead Sheathed Wiring
Lead sheathed wiring uses conductors which are insulated with VIR and are covered with an outer sheath of lead aluminium alloy which contains about 95% lead. The metal sheath gives protection to cables from mechanical damage, moisture and atmospheric corrosion.
Conduit Wiring
There are two types of conduit wiring according to pipe installation:
- Surface Conduit WiringWhen GI or PVC conduits are installed on walls or roof, it is known as surface conduit wiring. The conduits are attached to the walls with a 2-hole strap and base clip at regular distances. Electrical wires are laid inside the conduits.
- Concealed Conduit WiringWhen the conduits are hidden inside the wall slots or chiselled brick wall, it is called concealed conduit wiring. Electrical wires are laid inside the conduits. This is popular since it is stronger and more aesthetically appealing.
Here are some Advantages and Disadvantages of Concealed Conduit Wiring System
Advantages
- It is a safe wiring system
- Safe from chemical effects, humidity and other external factors
- No risk of shock
- It is aesthetically appealing
- No risk of wear and tear, fire or damaged cable insulation
- Quite reliable
- Renovations can be easily performed as you can replace old wires easily
Disadvantages
- Expensive as compared to surface conduit wiring
- Changing the location of switches or appliances is difficult
- Installation is complex
- Hard to find defects in the wiring
- Adding additional conduit in future is a tedious task
When the wiring is not done properly or isn’t maintained well, it may lead to dangerous situations such as electrical fires. Therefore, it is important that you take a lot of care while installing electrical wires and cables. If you are wondering which electrical wiring to install at your home, call us at D&F Liquidators, Inc. as we have a wide range of wiring at competitive prices and our experienced team will guide you through the selection process.
what are the 3 types of wires?
The electric power line enters our house through three wires- namely the live wire, the neutral wire and the earth wire.
To avoid confusion we follow a colour code for insulating these wires. The red wire is the live wire, and the black wire is neutral. The earth wire is given green plastic insulation. The live wire has a high potential of 220 volts whereas the neutral wire has zero potential. Thus the potential difference between the live wire and the neutral wire is 220-0 = 220 volts. The earth wire is much thicker in size and is made of copper.
One end of it is connected to a copper plate buried deep under the earth. The earth connection is made to the electric meter and then to the main switch. The live wire and neutral wire, coming from the electric pole, enter a box fitted just outside our house which has a main fuse F1.
The fuse is connected in series with the live wire. This is done so because it is only the live wire which has a high potential of 220 volts, unlike the neutral wire which carries zero potential. The fuse F1 has a high rating of about 50 amperes. Thus it prevents any damage such as fire to the entire electrical wiring entering the house due to short-circuit or overloading.
what is meaning of L and N in the AC terminal?
There are two different names, L (Live) and N (Neutral) on the AC input terminal. Please refer to Fig. 1 for the wiring of the AC input. The terminal L must be connected to the unearthed conductive part of AC main supply and the terminal N must be connected to the earthed conductive part of AC main supply, to apply for the safety agency approval. This purpose is the protection by a blowout fuse from electric shock by earth fault.
Also, the terminal FG needs to be connected to the earth to protect from electric shock and noise interference. Even if the terminal L and the terminal N is connected to another side of the terminal FG is not connected to the earth, then the power supply might not get broken and might not change its characteristic.
Even if terminal L and N are connected oppositely, the power supply operates normally. However, please note that the conductive part would be kept under the earthing fault condition. Please note that conducted emission and ripple noise characteristics would be changed when FG is not connected to ground.
Most of the AC-DC power supplies are classified as CLASS Ⅰ equipment in safety approval requirement, therefore FG terminal should be connected to the safety ground of the equipment.
Comments
Post a Comment