Legrand HX Phase Busbar - 4 049 26
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Product Information
Full details
The Legrand HX Phase Busbar (404926) is a professional-grade electrical distribution component designed for electricians and installers working with DX and DNX series circuit breakers. It streamlines the connection of up to 13 modular devices in a single row, offering a clean and efficient alternative to manual jumper wiring. While it significantly reduces installation time and minimizes wiring errors, users must ensure their specific circuit breaker models are compatible with its 17.7mm module width and prong-type configuration before purchase.
All features
| Model Part Number | 4 049 26 |
|---|---|
| Brand | Legrand |
Extended Product Information
FAQs
Can I cut this busbar to a shorter length?
Yes, but you must ensure that you properly cap the exposed end with an appropriate insulated end cover to maintain electrical safety.
Does this busbar support 3-phase systems?
No, this specific model (404926) is designed for 1P+N (single-phase plus neutral) applications only.
What is the maximum current this busbar can handle?
The rated permanent current for this busbar is 63A.
Is the busbar insulated?
Yes, the busbar is fully insulated to prevent accidental shorts and improve safety during maintenance.
Can this be used with non-Legrand breakers?
It is designed specifically for Legrand DX and DNX series; compatibility with other brands is not guaranteed and is generally not recommended due to varying terminal depths and widths.
Troubleshooting
Busbar prongs do not align with breaker terminals
Verify that your circuit breakers are compatible DX or DNX series models and ensure the busbar is not upside down; the 17.7mm pitch is standard, but improper seating can occur if the breaker is not fully clicked into the DIN rail.
Visible sparking or heating at the connection point
Immediately disconnect power and check that all terminal screws on the breakers are torqued correctly to the manufacturer's specifications; replace the busbar if any signs of arcing or melting are present.
Pros and Cons
Pros
- Significantly faster installation compared to individual wire jumpers
- Reduces cable clutter for improved panel organization and easier troubleshooting
- Integrated end protection enhances safety during and after installation
- Reversible design simplifies inventory management by supporting both live and neutral lines
Cons
- Strictly limited to 13 devices per busbar segment
- Requires specific alignment with prong-type breaker terminals
- Not compatible with non-modular or older, non-DX series equipment
Setup, Compatibility & Care
To install, ensure the main power to the distribution board is completely disconnected. Slide the busbar into the terminal slots of your DX or DNX circuit breakers, ensuring the prong-type connectors are fully seated. Once in place, tighten the screw terminals on the circuit breakers to secure the busbar firmly. This product is compatible with standard modular systems requiring a 17.7mm pitch. Maintenance involves periodic inspection to ensure that terminal screws remain tight, as thermal expansion and vibration can cause connections to loosen over time. Always verify that your load calculations do not exceed the 63A limit for the busbar.