In electrical conduit systems, FD boxes play a crucial role in ensuring safe and efficient wiring configurations. These device boxes are designed to accommodate wiring devices, act as pull boxes, or provide openings for taps and splices. They are suitable for use in wet locations when used with gasketed covers.
What is an FD Box?
An FD box is a type of device box installed in non-hazardous area conduit systems. They are available in two box depths with a wide variety of gang configurations, hub configurations, and hub sizes.
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Applications of FD Boxes
FD boxes are versatile components used in various electrical installations:
- Wiring Devices: They house switches, receptacles, and other wiring devices, providing a secure enclosure.
- Pull Boxes: FD boxes facilitate the pulling and splicing of conductors in conduit systems, simplifying complex wiring runs.
- Taps and Splices: They offer accessible openings for making taps and splices in wiring systems.
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Benefits of Using FD Boxes
Incorporating FD boxes into electrical systems offers several advantages:
- Durability: Constructed from materials like malleable iron, FD boxes provide high tensile strength and resistance to impact and shock.
- Weatherproofing: When used with gasketed covers, FD boxes are suitable for wet locations, ensuring protection against moisture ingress.
- Versatility: Available in various configurations, they cater to diverse installation requirements, accommodating different conduit sizes and wiring devices.
FD Box vs. FS Box: Key Differences
While both FD and FS boxes serve similar purposes, they differ in certain aspects:
- Depth: FD boxes are deeper than FS boxes, allowing them to accommodate devices exceeding 41.4 mm (1.63 in) in depth under fastening ears.
- Applications: The increased depth of FD boxes makes them suitable for housing larger wiring devices, whereas FS boxes are typically used for standard-sized devices.
Installation Considerations
When installing FD boxes, it’s essential to:
- Select Appropriate Materials: Choose boxes made from materials compatible with the environmental conditions, such as corrosion-resistant options for harsh environments.
- Ensure Proper Sealing: Use gasketed covers to maintain the integrity of the enclosure, especially in wet or damp locations.
- Comply with Standards: Adhere to local electrical codes and standards to ensure safety and compliance in all installations.
FAQ
1. What materials are FD boxes made from?
FD boxes are commonly constructed from malleable iron or aluminum, offering high tensile strength and resistance to impact.
2. Can FD boxes be used outdoors?
Yes, when equipped with gasketed covers, FD boxes are suitable for wet locations, making them appropriate for outdoor use.
3. How do I choose between an FD box and an FS box?
If your installation requires housing larger wiring devices exceeding 41.4 mm (1.63 in) in depth, an FD box is appropriate. For standard-sized devices, an FS box may suffice.
4. Are there different sizes available for FD boxes?
Yes, FD boxes come in various depths and configurations to accommodate different installation needs.
5. Do FD boxes require special maintenance?
Generally, FD boxes are low-maintenance. However, regular inspections ensure that seals remain intact and there is no corrosion or damage, especially in harsh environments.
