nx3-24s chint 9 x 9 dual rcd consumer unit amendment 3

Why Choose the CHINT NX3-24S 9 × 9 Dual RCD Consumer Unit?

The CHINT NX3-24S is a robust 9 × 9 dual RCD metal consumer unit designed for flexible electrical distribution and circuit protection in residential, commercial and similar installations. As part of the CHINT NX3 metal consumer unit series, it combines two 80 A, 30 mA RCDs with a 100 A main switch to provide a practical split-load distribution solution.

Designed as part of CHINT's Amendment 3 range of metal consumer units, the NX3-24S uses a metal enclosure and is designed to comply with the requirements of BS 7671:2008 Amendment 3 and BS EN 61439-3. Its high-integrity-ready configuration gives electrical installers additional flexibility when arranging compatible protective devices and dedicated circuits.

The 9 × 9 configuration provides 18 outgoing circuit ways divided between two RCD-protected sections. Each section is protected by an 80 A, 30 mA RCD, while the fitted 100 A main switch provides incoming isolation, making the NX3-24S particularly suitable for larger installations requiring substantial circuit capacity.

Key Advantages

• Generous 9 × 9 dual RCD consumer unit configuration.
• 18 outgoing circuit ways across two RCD-protected sections.
• Supplied with 2 × 80 A, 30 mA RCDs.
• Includes a 100 A main switch for incoming isolation.
• High-integrity-ready design provides additional circuit configuration flexibility.
• Robust metal enclosure designed for modern electrical installations.
• Large board capacity makes it suitable for installations with numerous final circuits.

Key Features

• CHINT NX3 metal consumer unit series.
• 9 × 9 dual RCD configuration.
• 18 outgoing circuit ways.
• 2 × 80 A, 30 mA RCDs.
• 1 × 100 A main switch.
• High-integrity ready.
• 24-module enclosure format accommodating the incomer, RCDs and outgoing devices.
• Metal construction for electrical distribution applications.
• DIN rail arrangement for compatible modular circuit-protection devices.
• Designed to comply with Amendment 3 requirements for metal consumer units.

Dual RCD Protection for Larger Electrical Installations

Dual RCD consumer units such as the CHINT NX3-24S divide outgoing final circuits between two residual-current devices. This arrangement provides 30 mA residual-current protection across two circuit groups and helps avoid placing all protected circuits onto a single RCD.

With 18 outgoing ways, two 80 A RCDs and a 100 A main switch, the NX3-24S provides substantial capacity for larger electrical installations. Its high-integrity-ready design also gives installers flexibility when configuring compatible circuit-protection equipment for circuits with different protection requirements.

Typical Applications

• Domestic electrical distribution systems.
• Large houses and residential properties.
• Commercial electrical installations.
• Lighting and socket circuit distribution.
• Heating and fixed appliance circuits.
• Workshops and light industrial premises.
• Electrical installation upgrades and consumer unit replacements.