Trystan Casey
BX cable, also known as Type BX cable, is a type of metal-clad, armoured electrical cable. It was widely used in the past and is still a viable option for modern electrical projects. The abbreviation BX has been used for decades to refer to all metal-jacketed cables. BX cable is known for its durability and added protection compared to other cables, such as non-metallic (NM) cables. However, it is important to note that older Type BX cables are not recognised in the National Electrical Code (NEC) today due to their lack of an internal bonding strip for ensuring an adequate path for fault current.
Explore related products
What You'll Learn
- BX is an abbreviation for a type of metal-clad electrical cable
- BX cable is durable and safe but cannot be used for outdoor applications
- BX wiring is old and may need to be replaced, depending on its condition
- BX cable is more protective than non-metallic cables but less convenient than plastic-sheathed NM cables
- BX cable is required when a metal box must be grounded to the cable's sheathing
BX is an abbreviation for a type of metal-clad electrical cable
BX cable, also known as Type BX wiring, is a metal-clad cable with a metal jacket or sheathing. This metal exterior sets it apart from other cable types and provides added protection, making it a popular choice for homeowners and electricians in the past. The metal armour of BX cable is much stronger than the vinyl coating of NM (non-metallic) cable, although it can still be pierced by a determined nail or screw.
BX cable was developed in the early 1900s, with records indicating its first use around 1910 and widespread production and adoption taking off in the 1920s. It was promoted as a modern, safe, and fireproof alternative to older cloth-sheathed wiring. Today, it is still recognised as a reliable choice for long-term electrical applications due to its durable construction.
The abbreviation "BX" has been associated with metal-clad cables for decades. While the exact origin of the term is uncertain, some speculate that it might be related to the product's initial production in the Bronx borough of New York. Over time, the term "BX" became synonymous with any cable featuring a metal jacket or armour, and it continues to be used in this context today.
While BX cable is still a viable option for electrical projects, offering unique benefits, it has been partially superseded by other cable types, such as NM cable, which is lightweight, easy to handle, and affordable. In some cases, electrical codes and standards may also favour the use of newer cable types, such as Type AC cable, which has improved features and compliance with modern requirements.
Electric Shock: Understanding the Meaning and Its Impact
You may want to see also
Explore related products
$29.99 $35.99
BX cable is durable and safe but cannot be used for outdoor applications
BX cable, also known as Type BX cable, is a type of metal-clad, armoured electrical cable. It has been widely used in the past, particularly for residential and commercial applications, due to its durability and added protection.
The abbreviation "BX" has been used for decades to refer to all metal-jacketed cables. BX cable is known for its strong outer casing, which is made of metal armour and provides better protection for individual conductors compared to non-metallic cables. This metal armour, while stronger than NM cable's vinyl, can be pierced by a determined and ill-placed nail or screw.
Despite its durability, BX cable is not without its limitations. One significant drawback is that it cannot be used for outdoor applications. This is because the cable is not designed to withstand the elements and may not be safe for use in damp locations. MC cable, on the other hand, can be used outdoors and has the added benefit of not having a limit on the number of conductors it can contain.
Another limitation of BX cable is that it cannot be used for extending new wiring. This means that if a room has a nearby BX outlet, it cannot be used to power a new outlet. Additionally, three-prong outlets cannot be installed on BX wiring unless a GFCI outlet is used, as there is no true ground present.
While BX cable is generally safe and durable, it may need to be replaced in older homes. The cost of replacement can vary depending on the amount of BX wiring present and the scope of work required. In some cases, it may be more cost-effective to replace the wiring while also adding new electrical features, such as recess lights, hard-wired smoke detectors, or additional outlets.
The Spark of Charisma: Electric Personalities Explained
You may want to see also
Explore related products
BX wiring is old and may need to be replaced, depending on its condition
BX wiring, or armored BX wire, is a type of metal-clad, armored electrical cable. It is typically either this, non-metallic (NM) cable, or Romex cable. BX cable is required when a metal box must be grounded to the cable's sheathing. While widely used in the past, it is now less common, though it can still be found in homes, particularly those with older wiring.
As BX wiring ages, the wires inside can become compromised if the outer metal armor is damaged or degraded. The armor can be cut or pierced by a misplaced nail or screw, for example. If the metal sheathing is ripped back, the wires inside may display degradation of their rubber insulation. However, if the wires inside are in good condition, there is usually no reason to replace the BX wiring. Older BX wiring only needs to be removed if the wire coating inside the sheathing is in poor condition.
If you are unsure about the condition of your BX wiring, it is best to get a qualified electrician to perform any electrical work you may need. They will be able to advise on whether the wiring needs to be replaced. This can be costly, so it is worth shopping around for quotes.
There are some signs that your BX wiring may need to be replaced. If you are experiencing issues with the ground connection, this could indicate loose connectors throughout the circuit, which may require the wiring to be replaced. If there are 120 volts between hot and neutral, and only 60 volts between hot and ground, this is a sure sign that the connectors are loose. This can be a safety hazard if there is a short circuit to the ground, as the breaker/fuse may not trip.
Understanding 'Provide' in Electrical Specs: A Comprehensive Guide
You may want to see also
Explore related products
BX cable is more protective than non-metallic cables but less convenient than plastic-sheathed NM cables
BX cable, or Type BX cable, is a type of metal-clad, armoured electrical cable. It is a popular choice for homeowners due to its durability and added protection compared to non-metallic cables. The abbreviation "BX" has been used for decades for all metal-jacketed cables. While it is more protective than non-metallic cables, it is less convenient than plastic-sheathed NM cables.
NM cables are lightweight, easy to handle, and affordable. They can be effortlessly cut, stripped, and pulled through stud holes, making them a convenient option for many electrical projects. On the other hand, BX cables are more challenging to work with and require special tools for cutting and ripping. The outer metal armour of BX cables is much stronger than NM cable vinyl, but it can still be pierced by a determined and ill-placed nail or screw.
One advantage of BX cables is that they can be used when a metal box must be grounded to the cable's sheathing, which is not possible with NM cables. Additionally, the sheathing on BX cables does not degrade and become gummy over time, unlike early 20th-century knob-and-tube wires. This makes BX cables a reliable choice for long-term electrical applications. However, it is important to note that older Type BX cables are not recognised in the National Electrical Code (NEC) today due to their lack of an internal bonding strip for ensuring an adequate path for fault current.
While BX cables offer superior protection, they are less convenient and more costly to install and replace than NM cables. When replacing BX wiring, electricians must create small holes to fish the new wiring around, and all visible BX wiring must be removed, adding to the overall cost and inconvenience. In contrast, NM cables can be easily run through holes drilled in the centre of wall studs for protection. Therefore, while BX cables offer enhanced protection, they are less convenient and more expensive to work with than NM cables.
Electrical Wiring: Understanding the Color Code
You may want to see also
Explore related products
BX cable is required when a metal box must be grounded to the cable's sheathing
BX cable, also known as Type BX cable, is a type of metal-clad, armoured electrical cable. It is a durable and protective cable that has been widely used in the past, particularly for residential and commercial applications. The abbreviation "BX" has been used for decades to refer to all metal-jacketed cables.
BX cable is typically used when a metal box must be grounded to the cable's sheathing. This is because the cable's metal armour or jacket can serve as a grounding means, although older versions of the cable may not be compliant with modern electrical codes. The metal armour of BX cable is much stronger than the vinyl casing of alternative cables, such as NM (non-metallic) cable, and provides added protection for the inner wires.
While BX cable is still a viable option for modern electrical projects, it has some limitations. For example, it cannot be used to extend new wiring, and three-prong outlets cannot be installed on BX wiring without a GFCI outlet. Additionally, BX cable is not suitable for outdoor use in damp locations, and there may be challenges in justifying its use due to compliance issues with modern electrical codes.
When replacing or working with BX wiring, it is important to consider the cost, safety, and convenience. Replacing BX wiring can be costly, and the work may require creating small holes in necessary locations to minimise damage to the structure. Only the BX circuits being worked on need to have their power turned off, and it is possible to live in the house while the wiring is being replaced. It is also worth noting that, while BX wiring may need to be removed in visible spaces, it only needs to be deactivated in concealed areas like walls and ceilings.
Understanding the Functionality of Electrical Starters in Engines
You may want to see also
Frequently asked questions
BX stands for a type of metal-clad, armoured electrical cable. It is also referred to as Type AC or Type BX cable.
BX cable is used for its durability and added protection. It is also fireproof and safe, unlike older cloth-sheathed wiring.
The cost of replacing BX wiring depends on the scope of work. The more outlets, lights and switches, the higher the cost.
