WAGO 821-109 TOPJOB S Main Distribution Set with RCD Test Push-Buttons

The WAGO 821-109 TOPJOB S Main Distribution Set is a comprehensive solution for creating a main distribution board with integrated RCD (FI) test circuit functionality. Designed for three-phase systems, this set includes all necessary terminal blocks, end plates, marking strips, and test push-buttons to build a main distribution point for up to 125 A incoming and 32 A outgoing circuits. The push-in CAGE CLAMP® technology ensures fast, tool-free wiring for conductors from 0.25 mm² to 35 mm².

Advantages

• Tool-free push-in connection saves installation time
• Integrated RCD test push-buttons simplify testing without additional components
• Compact design fits standard DIN rails (35 x 15 mm / 35 x 7.5 mm)
• High current rating (125 A main) suitable for residential and light commercial applications
• Clear colour coding (grey, blue, green-yellow) for phase, neutral, and PE

Suitable for

• Main distribution boards in residential buildings
• Small commercial electrical installations
• RCD-protected sub-distribution systems
• Industrial control cabinets requiring main distribution

Key specifications

• Nominal voltage: 400 V AC
• Nominal current (main): up to 125 A
• Nominal current (outgoing): up to 32 A
• Main conductor cross-section: 0.5 - 35 mm² (AWG 20 - 2)
• Outgoing conductor cross-section: 0.25 - 4 mm² (AWG 28 - 12)
• Number of phases: 3-phase + N + PE
• Main connection points: 5 (L1, L2, L3, N, PE)
• Outgoing connection points: 36 (12x L, 12x N, 12x PE)
• Mounting: DIN rail 35 x 15 mm / 35 x 7.5 mm
• Operating temperature: -35 °C to +85 °C
• Pollution degree: 3
• Insulation material: Polyamide 66 (PA 66)
• Approvals: VDE, UL, CSA (typical)

Recommendations

This set does not include the RCD unit itself; it provides the terminals and push-buttons for integrating an RCD test circuit. For a complete installation, pair with a suitable RCD (e.g., WAGO 857-xxx series). Always follow local electrical codes.