Wires are usually made of copper or aluminum, and these conductors are insulated as wires that send electricity to different parts of the house. EICR Certificate Cost choosing the right wire or cables is half the battle when installing new wiring. On the other hand, when you look at old wiring around the house, you can tell a lot about the circuit it’s in by identifying the type of wire (for example, opening a dialog box to see which wire goes where). (if you need to decide).
Wiring is very standard in modern homes, and most homes built after the mid-1960s have similar types of wiring. New electrical equipment requires new wiring that conforms to local building codes. Below you will learn about the different types of indoor wiring and choose the right option to complete your electrical project correctly and EICR Certificate Cost.
EICR Certificate Cost will help you understand some of the basic terms used to describe wiring. Electric wire is a type of conductor and is a material that conducts electricity. For indoor wiring, the conductor itself is usually copper or aluminum (or copper-coated aluminum), a single metal conductor or a wire. Most of the cables in the house are shielded. That is, it is stuck on a non-functional plastic cover. One notable exception is the ground wire. It is usually solid copper and is covered with a green coating or uncoated (bare).
Non-metallic (NM) cables, often known as “Romex” after the common brand names, are a type of circuit wire designed for indoor use in dry areas. NM is the most common type of wiring in modern homes. It consists of two or more different wires wrapped in a protective plastic cover. NM cables typically contain one or more “hot” (power) wires, neutral wires, and ground wires. These controls are covered in white (usually neutral) and black (usually warm) for installation. Most NM cables are in the form of a flat tube that runs invisibly through the walls, ceilings and floor spaces of the house.
Almost all cables in modern home outlets and lighting equipment are NM cables. This type of wire is cheaper than pipes, so it is used for hidden walls. The most common sizes and amperage ratings are as follows
- 14 gauge (15 amp circuit)
- 12 gauge (20 amp circuit)
- 10 gauge (30 amp circuit)
- 8 gauge (40 amp circuit)
- 6 gauge (55 amp circuit)
NM cables are sold with a color-coded outer jacket to indicate wire gauge.
- The white cover shows the NM cable with a 14 gauge controller.
- The yellow cover indicates a NM cable with a 12-gauge gauge.
- The orange cover indicates the NM cable with a 10 gauge control.
- Black coated cables are used for both 6 gauge and 8 gauge wires.
- The gray cover is not used for NM cables, but is protected for underground (UF) cables or service entrance cables (SE or SER).
Handling of NM cables is dangerous when circuit breakers are under voltage.
Underground feeders (UFs) are a type of non-metallic cable designed for direct burial in wet or underground locations. It is usually used to supply household appliances such as street lights. Like standard NM cables, UF contains a bare copper ground wire in addition to the heat and neutral wires. However, the NM cable sheath is a separate plastic wrap, while the UF cable sheath is a hard plastic that surrounds each wire.
This type of wire is more expensive than NM wire due to its long-term protection. UF cables are usually sold with a gray exterior. UF cables are used in main circuit wiring and can carry dangerous voltages for as long as the circuit exists.
THHN / THWN wire
THHN and THWN are the two most common insulated wire ropes used in pipelines. Unlike NM cables, where two or more individually insulated conductors (copper or aluminum) are combined in a plastic sheath, THHN and THWN wires are single conductors, each color coded. Instead of being protected by a NM cable sheath, these wires are protected by steel or plastic tubing.
EICR Certificate Cost is often used in homes for short exposed runs, such as in unfinished spaces such as basements and garages, and as wiring connections for garbage disposals and water heaters. These cables usually have the same price (and pipe cost) as NM cables. The letters indicate specific properties of the wire.
T: Thermoplastic plastic
H: heat resistance; HH stands for High Heat Resistance.
W: Evaluation of the wet area
A: Nylon cover, improved protection
THHN and THWN wires have a colored coating that is commonly used to identify the function in the circuit.
- Heat rays: black, red, orange
- Neutral wire: white, brown
- Ground wire: green, yellow-green
- THHN and THWN wires are circuit wires that you should never handle when the circuit is on.
Low voltage wire
Low voltage wire is typically used in circuits that require 50 volts or less. Some common types are landscape lighting wiring, sprinkler system connections, bell wiring (for doorbells), speaker system wiring, and thermostat wiring. Wire sizes range from approximately 22 gauge to 12 gauge, and these wires can be made of copper or aluminum.
Low voltage wires are usually insulated and can be enclosed in a cable sheath or twisted pair, like the wires of a light cable. It should only be used for low voltage applications. These usually very thin wires are very different from standard circuit wires and are cheaper than other household wires. Low voltage wires rarely cause serious shocks, but it is best to turn off the device before operating it.
Phone and data cable
Telephone and data wiring is low voltage wire used to connect to “landlines” and the Internet, usually made of copper. The telephone line can contain 4 or 8 wires. The most common household specification is wiring category 5 (Cat 5) cable consisting of eight wires wound in four pairs. It is used for both telephone and data transmission and offers greater capacity and quality than standard telephone lines. As with low voltage wires, EICR Certificate Cost is often cheaper than other types of household wiring.
Data cables have a small voltage range, but anything under 30 volts is generally considered safe (home circuits carry about 120 volts). However, there is always the risk of your data line connecting to your household wiring. Therefore, you need to treat it carefully and avoid touching the bare wire.
TheCoaxial cable is becoming less common for TV data transmission using other data cables such as HDMI. AndCoaxial cable is a circular jacketed cable with an inner conductor (usually copper) surrounded by a tubular insulating layer made of a braided wire tube. This can be identified by the thread connector used to create the connection between the union and the device.
Coaxial cable was once the standard for connecting televisions to antennas or cable service outlets, but is used to connect satellite receiver antennas and provide subscription television services to home distribution points. It is still often used. It usually has a black or white coating and a perfect round shape, which is easily distinguished from NM electric circuit cables. Coaxial cables can be found at most hardware and electronics stores at reasonable prices.
The very small voltage carried by a coaxial cable signal is unlikely to cause any kind of shock unless the cable is connected to another current source.
Choice of wire type
Whether you’re replacing old wiring or adding new wiring in your home, it’s important to choose the right type. Make sure you choose the specific wire according to the purpose of use. For example, in wet outdoors, you should always choose UF wiring to protect your home’s electrical system from the elements. The size and lugs of each wire must be considered and the wires must match the actual needs of all electrical projects. If you’re not sure what type of wiring you need, it’s a good idea to consult EICR Certificate Cost before installing any type of wiring in your home.