The most commonly used wiring method for residential use is called nonmetallic sheathed cable. Other types of wiring methods are knob and tube, as well as service entrance cable.
The difference is the type of insulation on the conductors. Type AC used a thermoset insulation , Type ACT is a theromplactic insulation.
Current in the single core cable would induce a magnetic current in the steel cable, though a transformer effect. This would heat the steel armored strands, and the circuit would increase more electrical power from the load supply point. The earthing of the cable glands would complete the circuit and the return current would flow in the earth bonding cable between the two points. This is called Eddy currents generated in the cable by the twist of the steel armored around the central core, current flowing in one direction
Non metallic sheathed cable is used as conductors in home wiring.See related links below.
It depends on whether the building classification is combustible or non combustible. On a new commercial building wiring is usually designed by an electrical engineer. In this case the wiring is done to their specifications. On a rewire of a commercial building BX cable can be used behind wall board. The reasoning is that most commercial buildings these days use steel studs. Dragging ordinary NMD wire through these types of studs can cut the outer sheath. In some jurisdictions steel stud bushings have to be used when a steel stud is hole punched. By using this type of wiring cable, rigid conduit or EMT does not have to be used.
Armored cable is used in environments such as a front yard where environmental conditions make an armored cable susceptible to damage. If the question is asking about Shielded/Screened cable, that has a small thin metal foil wrapping that is used to "screen out" most external signal noise from the cable.
For protection of the wires.
Mac anntena
Armored electrical cable contains insulated electrical service wires protected by a flexible steel covering. Unarmored electrical cable has no protective flexible steel covering, its covering is made of plastic. <><><> Armored cable (BX) is the older version of Metal Clad cable (MC). It was flexible steel covered wire that used the steel as it's Ground. BX was a poor grounding system so it was replaced with MC which looks similar but has a separate Grounding conductor. MC is most often made with aluminum as its cover. Armored cable if used today will refer to MC type wiring. <><><> Some kinds of armored cable are in fact made to a tougher standard than the ordinary soft wire strand types of shielded cable that are used for hooking-up antennas. The 'armor' is actually a thin flexible metal film that better protects the wire or wires inside from damage in high use or high traffic areas. Such kinds of armored cable are also used in radio frequency assemblies in electronic equipment.
Steel Wire Armored.
Armored electrical cable contains insulated electrical service wires protected by a flexible steel covering. Unarmored electrical cable has no protective flexible steel covering, its covering is made of plastic. <><><> Armored cable (BX) is the older version of Metal Clad cable (MC). It was flexible steel covered wire that used the steel as it's Ground. BX was a poor grounding system so it was replaced with MC which looks similar but has a separate Grounding conductor. MC is most often made with aluminum as its cover. Armored cable if used today will refer to MC type wiring. <><><> Some kinds of armored cable are in fact made to a tougher standard than the ordinary soft wire strand types of shielded cable that are used for hooking-up antennas. The 'armor' is actually a thin flexible metal film that better protects the wire or wires inside from damage in high use or high traffic areas. Such kinds of armored cable are also used in radio frequency assemblies in electronic equipment.
A cable with a steel sheath.AnswerArmoured cables are cables designed to by laid underground. An armoured cable is a cable whose conductors are protected from mechanical damage by an outer layer of steel tapes or wire. The armour itself is protected against corrosion by an outer waterproof layer. The steel tape or wire is wound around the cable to maintain its flexibility.
The most commonly used wiring method for residential use is called nonmetallic sheathed cable. Other types of wiring methods are knob and tube, as well as service entrance cable.
rollover cable
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Armored cable that has a inbedded tape that is used for grounding purposes. The steel tape is wrapped around the inner conductors which carry the load current. A heavy rubber coating is applied over the steel tape layer. The steel and heavy rubber helps protect the cable from physical damage, e.g. by someone digging in the ground where the cable is buried.
Southwire, a manufacturer of this type of cable defines ACT as a multiple conductor thermoplastic insulated cable with steel spiralled interlocking armour. The armour has the appearance of flexible conduit. AC cable is also known as BX cable. Common insulation materials thermoset and thermoplastic as used in AC cable. Type AC cable have different identifiers and insulation type. Type ACTHH has 194 degree (90 degree Celsius) thermoplastic insulation. Type ACTH has 167 degree (75 degree Celsius) thermoplastic insulation. Type AC has thermoset insulation. Type ACHH has 194 degree (90 degree Celsius) thermoset insulation.