Electrical enclosure blanking strip Rittal 9677.407 — PVC white, for NH busbar sizes 00–3 (185 mm)

Rittal 9677.407 is a white PVC blanking strip designed to fit electrical enclosures and to cover NH busbar areas sized 00–3 (185 mm). The strip provides a clean finish for unused sections of switchgear and distribution panels, helping to reduce dust ingress and to minimise the risk of accidental contact with live components. It is intended to create a contact surface for the installation of a front contact hazard protection cover plate and to support tidy, safe panel layouts.

Advantages

The PVC construction offers electrical insulation and mechanical protection while remaining lightweight and easy to handle. Its standard 185 mm length matches NH busbar sizes 00–3, enabling straightforward replacement or retrofitting in existing enclosures. The white finish improves visual contrast inside panels for easier identification of protected areas and contributes to an orderly appearance in installations.

Suitable for

• Covering unused NH busbar sections sized 00–3 (185 mm) in low- and medium-voltage switchgear
• Providing a mounting/contact surface for front contact hazard protection cover plates
• Retrofitting or replacing damaged or missing blanking strips in distribution panels and enclosures
• Electrical cabinets where dust protection and prevention of accidental contact are required

When it may not be suitable

This blanking strip is a passive cover made of PVC and is not a replacement for certified live-component insulation or barrier systems required by specific standards. It is not designed for direct exposure to high temperatures, open flames, or chemical environments that degrade PVC. For applications that require integrated earthing, high mechanical impact resistance, or compliance with particular industry certifications, check the enclosure and system requirements before use.

Key specifications

• Material: PVC (white)
• Intended busbar size: NH 00–3 (185 mm)
• Function: Blanking/covering of busbar sections and contact surface for protection plate
• Typical application: Switchgear and distribution panel interiors

How to use

Measure the intended NH busbar section to confirm compatibility with NH sizes 00–3 and the 185 mm dimension. Clean the area of dust, grease, or debris before installation. Position the blanking strip over the unused busbar section or mounting area and secure it according to the enclosure manufacturer’s mounting provisions or fastening method. If the strip is used as a contact surface for a front contact hazard protection cover plate, ensure the cover plate is mounted and secured so there is no unintended movement or exposure of live parts. After installation, verify that all enclosure panels close correctly and that protective clearances are maintained.

What to consider before purchase

• Confirm NH busbar size and the 185 mm length compatibility with your enclosure model
• Verify that PVC material properties (temperature, chemical resistance) suit your installation environment
• Check whether your application requires certified insulating barriers or earthing solutions in addition to a blanking strip
• Ensure mechanical fastening or mounting options in the enclosure match the strip’s use as a cover or support for a protection plate

Usage recommendations

Use the blanking strip only as a passive protective cover and contact surface for a front contact protection plate; do not rely on it as the sole means of compliance where regulatory or safety standards mandate specific barrier or insulation components. Inspect periodically for damage, discoloration, or deformation and replace if integrity is compromised.