If we consider electricity as the life force of machines, wiring can be its blood circulation system. Without blood we cannot even live a single moment. The same goes for wiring too, as in the case of machines or any electricity powered equipment in the world. Wiring distributes the life energy every machine ever needed to survive a single second. In this blog, we explore everything we need to learn about different types of wirings we usually see in the home construction world and yes, that’s how we make the light bulbs glow exactly like us, in and out. Keep reading, you are “awesome” 😊
1. Non-Metallic (NM) Cable (Romex)
A. Key Specs:
- Construction: An NM cable is made up of two or more insulated copper conductors that are wrapped in a non-metallic jacket, typically made of PVC.
- Insulation: A non-metallic covering surrounds the entire assembly, and plastic is used to insulate each individual conductor.
- Applications: NM cable is made to be used in dry, indoor spaces such as residential building walls, ceilings and floor voids.
- Common Types: The most used kind of NM cable is NM-B, which has a 90 degree Celsius (194 degree Fahrenheit) temperature rating.
- Not for Outdoor Use: NM cable should not be used outside or in locations where it could be subjected to mechanical harm.
- Easy Installation: NM cable is very simple to install because of its flexibility and light weight.
B. Examples:
- In residences, NM cable is used to wire light switches, outlets and ceiling fixtures.
- In terms of the number of conductors and wire gauge, common NM cable types are NM-B 14/2, NM-B 12/2, and NM-B 10/2.
C. Considerations:
- NEC Compliance: The National Electrical Code (NEC) must be followed when installing NM cables.
- Protection: By being installed inside walls or ceilings, NM cable can be shielded from external harm.
- Moisture and Heat: It is not recommended to utilize NM cable in hot or muggy conditions.
- Gauge: Choose the appropriate gauge (size) of NM cable based on the electrical load requirements of the circuit.
2. Conduit Wiring
A. What it is:
- Electric wires are encased in stiff or flexible tubes in conduit wiring.
- The wires are protected from outside influences by these tubes, also known as conduits.
- Conduits can be buried below, mounted on surfaces or hidden inside walls or ceilings.
B. Types of Conduits:
- Rigid Metal Conduit (RMC):steel conduit with thick walls that offers the highest level of security.
- Intermediate Metal Conduit (IMC):IMC is lightweight and thinner than RMC while yet providing adequate defence.
- Electrical Metallic Tubing (EMT): It is a steel conduit with thin walls that is simple to install and bend.
- Flexible Metal Conduit (FMC): This type of conduit allows for routing flexibility because it is composed of interlocking metal strips.
- Liquid Tight Flexible Metal Conduit (LFMC): Like FMC, LFMC has an outer jacket that is liquid-tight for extra protection.
- PVC Conduit: A non-conductive plastic conduit that provides good corrosion and moisture resistance.
- Liquid Tight Flexible Nonmetallic Conduit (LFNC): Flexible non-metallic conduit with a liquid-tight jacket is known as LFNC.
C. Why this:
- Protection: Wires are shielded by conduits from several dangers, including moisture, dust, chemicals and physical harm.
- Safety: Conduits lower the chance of electrical shock and fire threats by protecting cables.
- Organization: By keeping wires neatly arranged, conduit systems facilitate electrical system maintenance and troubleshooting.
- Code Compliance: Conduit wiring is frequently required in certain circumstances by municipal building codes.
D. Applications:
- In commercial, industrial and residential contexts, conduit wiring is frequently utilized.
- It is frequently used outdoors, in basements and along walls, among other exposed areas.
- Additionally, it is utilized in installations that are concealed inside walls or ceilings.
E. Installation:
- Conduit systems need to be installed and planned carefully.
- Connectors, couplings, elbows and other appropriate fittings are commonly used for installing conduits.
- They may need to be cut, bent and joined throughout the installation process using the proper techniques.
3. Casing and Capping Wiring
A. What It is:
- The insulated wires must be enclosed in a rectangular piece made from plastic (often PVC) housing. The wires are held in place by grooves in the case, which is then sealed with a cap to provide additional protection.
B. How It Works:
- The cables are placed into the channels of the casing, which is usually fastened to the wall or other surface. After that, the cap is fastened on top, forming a closed path for the cables.
C. Common Uses:
- This technique is frequently employed for surface wiring in residences and workplaces, as well as for wire distribution and other wiring system protection. It works well with low-voltage wiring as well.
D. Advantages:
- Simple and Cost Effective: Comparing it to some other wiring techniques, such as concealed conduit wiring, it is typically less expensive and simpler to install.
- Easy to Repair or Modify: The wires can be easily accessed for repairs of alterations thanks to the open architecture.
- Good for Surface Wiring: When wiring needs to be routed along walls or ceilings without being buried in the structure, surface wiring is the best option.
E. Disadvantages:
- Not as Aesthetically Pleasing: Exposed wire cannot be as visually appealing as covered wiring.
- Less Protection than Conduit: It gives some protection, but conduit wiring is better at keeping our rats, dampness and physical harm.
- Can be Bulky: In comparison to more contemporary wiring techniques, the casing and capping may make the installation appear a little bulkier.
F. Materials:
- PVC which is strong and chemical-resistant, is usually used to make the casing and capping.
G. Lifespan:
- The average lifespan of a PVC casing and capping system is 20 years.
4. Cleat Wiring
- Components: The majority of cleat wiring is made up of cleats and threads with shielding (PVC or VIR).
- Cleats: These support structures, which are often composed of hardwood or porcelain and consist of an underside and a top part, hold the electrical cables in place.
- Installation: After inserting wires into the base cleat’s grooves, the wire is secured by screwing the cap onto the top.
- Purpose: The purpose of cleat wiring is to provide quick and simple wiring solutions in situations that require temporary installations, such as construction sites.
- Advantages: Bonuses include price, simplicity of installation, and quick inspection and servicing.
- Disadvantages: Because the wires are exposed, it is not appropriate for long-term use, particularly in locations with moisture, chemicals or extremely high or low temperatures.
5. Batten Wiring
A. Main Points:
- Wooden Battens: The system’s wooden battens, which are often made of teak, are secured to the ceiling or wall using screws or plugs.
- Insulated Wires: Single, double or three-core cables made of PVC (polyvinyl chloride) or TRS (tough rubber sheathed) are utilized.
- Brass Clips: Tinned brass clips secure insulated wires to the battens.
- Spacing: The standard distance between clips for horizontal runs is 10 cm, while for vertical runs, it is 15 cm.
B. Advantages:
- Easy Installation: When compared to certain other wiring techniques, batten wiring is comparatively simple to install.
- Cost-Effective: In terms of materials, it is typically a less expensive wiring alternative.
- Customization: It is easily adaptable to various layouts and specifications.
- Appearance: When fitted properly, it can have a respectable visual appeal.
C. Disadvantages:
- Not for All Environments: Because extreme humidity, moisture or chemical exposure can harm the wires, it is not recommended for use in these settings.
- Not for Heavy Loads: In general, high-power circuits shouldn’t use it.
- Fire Hazard: Compared to conduit or casing and capping wiring, there is a greater chance of fire and mechanical damage, which makes it inappropriate for workshops.
- Limited Voltage: usually used at voltages lower than 240 volts.
D. Considerations:
- Safety: Although usually safe, correct installation by a qualified expert is essential to guarantee safety and reduce hazards.
- Maintenance: To find and fix any possible problems, routine inspection and maintenance are crucial.
6. Low Voltage Wiring
A. Voltage:
- Because it often operates at fifty voltages or less, it is safer than high-voltage wire.
B. Applications:
- Security Systems: Access control, cameras and alarms.
- Telecommunication: Data transfer, internet access and phone lines.
- Audio/Video: Speaker systems, surround sound, and home theaters.
- Lighting: These consist of subsurface lighting, under-cabinet lighting, and garden lights.
- Home Automation: Some examples are, smart appliances, automated blinds and thermostats.
C. Safety:
- Lower voltage makes it safer to install and use since it lowers the chance of electric shock and fire threats.
D. Energy Efficiency:
- Low-voltage systems frequently use less energy since they use less power.
E. Installation:
- Calls for specific installation procedures, which frequently include structured cabling methods.
F. Visual Differences:
- Low-voltage cables may be color-coded for distinct purposes and are frequently thinner.
G. Structured Cabling:
- It describes the methodical and uniform installation of low-voltage cable, frequently in a network distinct from the main electrical system.