The Wiremold B3 outlet box delivers 1-3/8 inches of depth — the deepest dimension in the standard raceway lineup. That extra space matters when you’re cramming dimmers, speed controls, or GFCI outlets into surface-mounted systems. The deep dimension specifically accommodates larger devices like dimmers and speed-control switches that would bind up in shallower boxes.
Metal vs. Plastic: When Each System Makes Sense
The B-series uses heavy-duty steel construction with corrosion-resistant baked enamel finish. Wiremold emphasizes rugged steel materials for commercial and industrial installations where durability trumps everything else. The metal construction handles abuse that would crack plastic systems — think warehouse walls, agricultural buildings, or anywhere forklifts operate.
The CordMate II Kit uses non-metallic plastic with self-adhesive backing for straightforward installation on baseboards or walls. Perfect for residential wire management where you need quick concealment without drilling. It blends seamlessly with decor, complies with RoHS standards, and is paintable.
The plastic systems work fine for low-voltage cables and light-duty applications. But when you need real protection — or when local codes demand metal construction — the B-series steel raceways are the only option. Some municipalities require all-steel construction or prohibit nonmetallic systems, making metal the default choice for commercial work.
System Compatibility and Real-World Installation
The B3 box is designed for the B1 Raceway system, 500 Series Metal Raceway, and 700 Series Metal Raceway. This modular approach lets you build out complete surface-mounted wiring systems using compatible components. The box adapts an existing outlet as the starting point of a wiring system — you’re essentially extending from what’s already there rather than running new home runs.
Professional contractors praise these channels for their ease of installation and effectiveness in managing and concealing electrical wiring. The steel construction means you can paint them to match existing surfaces. The white BW3 variant is specifically paintable to match décor, while the standard ivory finish works in most commercial settings.
| Specification | B3 Deep Box | Standard B1 Box |
|---|---|---|
| Depth | 1-3/8 inches (1.375 in) | Shallower (unspecified) |
| Material | Steel | Steel |
| Finish Options | Ivory baked enamel (standard), White (BW3 version) | Similar options |
| Certification | UL listed | UL listed |
Montana’s temperature swings make metal construction the smart choice for commercial and industrial applications. Plastic raceways can become brittle in extreme cold or warp during hot summers. The steel B-series handles -30°F winters and 100°F summer days without cracking or deforming.
Customer reviews consistently rate these products highly, with 5.0 out of 5 stars based on available ratings from L&M Fleet Supply and PlumbersStock. That’s the kind of feedback that matters — contractors voting with their wallets and coming back for more.
Frequently Asked Questions
Q: Can the plastic CordMate system be used for standard 120V wiring?
A: The CordMate raceway is not NRTL listed but is intended solely for protecting electrical and low-voltage wiring. For standard electrical wiring, stick with the metal B-series products that carry proper UL listing for line voltage applications.
Q: What’s included with the B3 outlet box?
A: The B3 typically includes mounting screws or base hardware, though exact contents aren’t explicitly detailed. Plan on having your own wire nuts and devices — this is just the box itself.
Q: How does the B3 compare to the BW3?
A: BW3 is the white, paintable version of the B3 (which is standard Ivory). Same deep 1-3/8” dimension, same steel construction. Choose based on your finish requirements.
Q: Do these systems work with standard electrical devices?
A: Yes. The B3 is designed to accommodate oversized devices like dimmers and speed-control switches. Standard switches and outlets fit with room to spare.
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