Flat conductor cable is a type of electrical cable that is commonly used in industrial applications, such as robotics, automation, and power distribution systems. Flat conductor cable is a flexible cable that is constructed of multiple insulated conductors that are arranged side-by-side and sandwiched between layers of insulation. The cable is flat in shape, which makes it easy to install in tight spaces and to route around corners.
The National Electrical Code (NEC) 2023 edition provides guidelines and requirements for the installation of flat conductor cable. These guidelines are critical for ensuring the safe and reliable operation of electrical systems that utilize flat conductor cable.
Construction and Ratings of Flat Conductor Cable
Flat conductor cable is typically constructed with stranded copper conductors that are insulated with a thermoplastic material. The insulated conductors are then arranged side-by-side and sandwiched between layers of insulation. The insulation can be made of a variety of materials, such as polyethylene, polyurethane, or polyvinyl chloride (PVC).
The conductors in flat conductor cable are typically rated for a voltage of 300 volts or less. The current-carrying capacity of the cable is determined by the size and number of conductors, as well as the insulation rating.
Installation Requirements for Flat Conductor Cable
The installation requirements for flat conductor cable are outlined in Article 324 of the NEC 2023 edition. The article specifies the installation methods, supports, and grounding requirements for flat conductor cable.
Installation Methods
Flat conductor cable can be installed in a variety of ways, including surface-mounted, recessed, or embedded in walls or floors. The installation method will depend on the specific application and the environment in which the cable will be used.
Supports
Flat conductor cable must be supported at regular intervals to prevent sagging or damage. The cable must be supported every 3 feet or less for lengths up to 6 feet, and every 5 feet or less for lengths greater than 6 feet. The supports must be made of an appropriate material, such as cable ties or clamps, and must be securely fastened to the building structure.
Grounding Requirements
Proper grounding is essential for any electrical installation, including flat conductor cable. Grounding provides a low impedance path for fault current and ensures that the electrical system is safe for users and equipment.
Article 324 specifies the grounding requirements for flat conductor cable. The cable must be grounded at the point of origin and at every point where the cable is terminated. The grounding conductor must have the same current-carrying capacity as the flat conductor cable and must be connected to the grounding electrode system. The grounding electrode system must have the necessary resistance to ensure that it can handle fault current.
Advantages of Flat Conductor Cable
Flat conductor cable has several advantages over traditional round cable. One of the main advantages is its flexibility, which makes it easy to install in tight spaces and to route around corners. This flexibility also allows the cable to be easily coiled and stored when not in use.
Flat conductor cable is also lightweight, which makes it easy to handle and transport. This is especially important in industrial applications where large amounts of cable are used.
Another advantage of flat conductor cable is its high level of durability. The cable is designed to withstand harsh environments and is resistant to chemicals, abrasion, and temperature fluctuations.
Applications of Flat Conductor Cable
Flat conductor cable is commonly used in industrial applications, such as robotics, automation, and power distribution systems. The cable is also used in motion control systems, where it is necessary to transmit power and signals to moving machinery.
Flat conductor cable is ideal for applications where space is limited, such as in conveyor systems or in machines with a limited amount of internal space. The cable is also commonly used in high-speed data transmission applications, where it is necessary to transmit signals quickly and reliably.
Another application of flat conductor cable is in the automotive industry. The cable is used in cars, trucks, and other vehicles to transmit power and signals between components. The flat shape of the cable makes it easy to install in tight spaces, such as inside door panels or under the dashboard.
Flat conductor cable is a versatile and durable type of electrical cable that is commonly used in industrial applications. The NEC 2020 edition provides guidelines and requirements for the safe and reliable installation of flat conductor cable.
By following these guidelines, installers can ensure that the electrical system is protected from physical damage and that the cable is properly grounded to prevent electrical hazards. Flat conductor cable offers several advantages over traditional round cable, including flexibility, durability, and space-saving design.