Middle Atlantic NM Transition FTG Left 54 - 5408L-WH

Middle Atlantic 5408L-WH Non-Metallic Raceway Left Transition Fitting

Overview

The Middle Atlantic 5408L-WH is a left-hand transition fitting designed for the 5400-series non-metallic (NM) raceway system. At 6.8 in (17.3 cm) wide and 1.8 in (4.6 cm) tall, it provides a clean directional change where a raceway run meets a wall surface, junction box, or panel edge on the left side — keeping cable management tidy without field-fabrication or improvised fittings. If you are routing structured cabling, low-voltage security wiring, or AV signal runs along walls in commercial or government environments, this fitting closes the gap that a straight section cannot handle. Explore the full Middle Atlantic raceway and enclosure catalog for compatible system components.

Key Features

• Left-hand orientation (6.8 in / 17.3 cm width): Provides a factory-finished directional transition on the left side of a raceway run. Using the correct handed fitting eliminates the need to cut or notch straight sections, which weakens the raceway and leaves exposed edges that can damage cable jackets over time.
• Low-profile 1.8 in (4.6 cm) height: Keeps the transition fitting flush with standard 5400-series raceway depth, so the assembled run maintains a uniform profile across the entire wall — no bulge, no misaligned cover gaps. This matters in finished spaces like lobbies, classrooms, and healthcare corridors where aesthetics are inspected.
• White finish: Matches standard white-painted drywall and drop-ceiling environments directly. Painting is optional rather than required, which saves time during installation in occupied spaces where wet paint is an issue.
• TAA-compliant construction: Meets Trade Agreements Act requirements, making the 5408L-WH eligible for use on federal, state, and municipal contracts where TAA compliance is mandated. Verify your project's procurement requirements — if TAA is on the spec sheet, this fitting checks that box. This also makes it suitable alongside other TAA-compliant cable management products in government facility deployments.
• Non-metallic (NM) material: Avoids the RF interference concerns of metallic raceway in environments with wireless access points or RF-sensitive equipment. NM raceway is also lighter and easier to cut cleanly in the field, which reduces installation time on long runs.
• 5400-series system compatibility: Designed as a purpose-built component of the 5400-series NM raceway family. Using matched system fittings rather than generic adapters ensures consistent cover fit and eliminates stress points at joints — a common source of cover pop-off in high-traffic areas. Pair with compatible raceway fittings and accessories from the same system for a complete installation.

Integration and Compatibility

The 5408L-WH is a component fitting within the Middle Atlantic 5400-series non-metallic raceway system. It is intended for use with 5400-series straight sections, inside corners, outside corners, and covers. If your run requires a right-hand transition, a separate right-hand variant is required — this fitting is handed and not reversible. For security integrators routing camera power and data cables along perimeter walls, or AV installers managing HDMI and control wiring in conference rooms, the 5400-series system with appropriate transition fittings like the 5408L-WH keeps structured cabling organized and code-compliant without conduit.

Frequently Asked Questions

Q: Is the Middle Atlantic 5408L-WH TAA compliant?

A: Yes. The 5408L-WH is TAA compliant, making it eligible for use on government and federally funded projects that require Trade Agreements Act compliance.

Q: What are the dimensions of the 5408L-WH?

A: The fitting measures 6.8 in (17.3 cm) wide and 1.8 in (4.6 cm) tall.

Q: Is the 5408L-WH reversible — can it be used as a right-hand transition?

A: No. The 5408L-WH is a left-hand transition fitting and is not reversible. A separate right-hand fitting is required for right-side transitions.

Q: What raceway system is the 5408L-WH designed for?

A: It is a purpose-built fitting for the Middle Atlantic 5400-series non-metallic raceway system and is designed to integrate with 5400-series straight sections, covers, and other system fittings.

Q: What color is the 5408L-WH?

A: White, matching standard painted drywall environments and minimizing the need for field painting in finished commercial spaces.

James Everett

The 5408L-WH is the kind of fitting that gets overlooked at the spec stage and then becomes the hold-up on install day when someone realizes they ordered straight sections and inside corners but forgot the transition pieces. At 6.8 in wide and 1.8 in tall, it fits tightly into the 5400-series profile — no shimming, no improvised cuts — and the TAA-compliant designation means it can go straight onto a government facility BOM without a compliance review delay.

Technical Highlights:

• 6.8 in width: Sized to match the 5400-series raceway body exactly, so the cover seats flush across the transition. Mismatched aftermarket fittings leave a lip that catches on covers and eventually cracks them — this one doesn't.
• 1.8 in height: Low enough to clear standard wall-mount backboxes and surface conduit knockouts without requiring a riser section. That matters when you're transitioning from a raceway run into a surface-mount box in a finished wall space.
• TAA compliance: Documented on the product spec sheet. If your project runs through GSA schedules or state procurement with TAA requirements, this fitting is already cleared — no substitution needed at the last minute.

Deployment Considerations:

• The 5408L-WH is handed — left only. Order the correct variant before the job starts. Discovering a handed mismatch on-site when the raceway run is already mounted adds a return-shipping delay that kills schedule.
• White finish works without painting in most commercial drywall environments, but if your facility uses a non-standard wall color, plan for field painting — the non-metallic material takes paint cleanly, but it needs a primer coat on slick surfaces.

Best fit for government buildings, healthcare facilities, and commercial office buildouts where the 5400-series NM raceway is already specified and TAA-compliant components are a procurement requirement rather than a preference.