Chapter 11, Problem 1RQ

To determine

The five common types of cable used in residential wiring along with their NEC® article for each cable.

Explanation of Solution

The common types of cable used in residential wiring are as follows:

• Nonmetallic sheathed cable
• Power and control tray cable
• Underground feeder cable
• Armored cable
• Metal-clad cable

Nonmetallic sheathed cable

The installation specifications for nonmetallic sheathed cable are covered in Article 334 of the NEC®. Type NM cable is permitted to be used in one- and two-family houses which include detached or attached garages and storage buildings, according to Section 334.10(1).

Power and control tray cable

The National Electrical Code now enables Type TC cable to be used in one- and two-family dwelling units under Section 336.10(9). Type TC cable is defined as a factory assembly of two or more insulated conductors, with or without associated grounding conductors, underneath a nonmetallic jacket, as defined in Section 336.2.

Underground feeder cable

Type UF cable can be utilized in house wiring for direct burial purposes or for wiring scenarios where nonmetallic sheathed cable would ordinarily be utilized, according to Article 340 of the NEC®. Section 300.5 must be applied for underground installation standards.

Armored cable

Armored cable, often known as "BX" cable by electricians, can be used in a house either concealed or exposed. Exposed Type AC wire must closely follow the building finish surface or be attached to running boards according to Section 320.15. 

Metal-clad cable

The other type of cable where some electricians use for house wiring is metal-clad cable. The NEC® specifies certain installation criteria for Type MC Cable in Article 330.

Conclusion:

The five common types of cable used in residential wiring are nonmetallic sheathed cable, power and control tray cable, underground feeder cable, armored cable and metal-clad cable.