RIFI Flexible Metal Conduit Sizes

Flexible Metal Conduit (FMC)

Material : Galvanized steel 

Understanding Flexible Metal Conduit (FMC)

What is Flexible Metal Conduit?

Flexible Metal Conduit (FMC) is a type of electrical conduit made from helically wound, interlocked metal strips, creating a flexible and bendable conduit. It is commonly used in commercial and industrial applications where flexibility and protection of electrical wiring are necessary.

Types of FMC

1. Standard FMC: Made from galvanized steel or aluminum, providing mechanical protection and flexibility.
2. Liquidtight Flexible Metal Conduit (LFMC): An FMC with a plastic coating, providing additional protection against moisture, making it suitable for wet or damp locations.

Applications of FMC

• Commercial Buildings: Used in areas requiring frequent changes or modifications in the wiring.
• Industrial Settings: Provides protection to wires in harsh environments with vibrations and movements.
• Residential Installations: Used in areas like attics, basements, and garages where flexibility is required.

Installation Guidelines

1. Conduit Sizing: Ensure the conduit size is appropriate for the number and size of wires to avoid overfilling.
2. Bending: FMC can be bent manually or with a conduit bender, ensuring smooth bends to avoid damage to the wires.
3. Securing: FMC should be securely fastened at regular intervals as per NEC guidelines to prevent sagging and damage.
4. Connections: Use proper connectors and fittings to join FMC to electrical boxes and other conduits, ensuring a secure and grounded connection.

Advantages of FMC

• Flexibility: Easily bends around obstacles and tight spaces.
• Durability: Provides robust protection to electrical wires.
• Ease of Installation: Simplifies the installation process, especially in complex layouts.

Disadvantages of FMC

• Cost: Generally more expensive than rigid conduits.
• Mechanical Strength: Less mechanically robust compared to rigid metal conduits.