Buy Main Switch: The Ultimate Guide & Comparison 2026 – 3-Pole vs 4-Pole, 80A to 100A

The main switch is the central safety component in every electrical installation – whether in the meter cabinet, control cabinet, sub-distribution, or machinery. It enables safe, complete disconnection of the power supply and complies with strict VDE regulations. In this comprehensive main switch guide, you'll learn everything important about types, selection criteria, standards, and a direct comparison of the best models available at ekabel24.de.

Discover the full range in the main switch shop at ekabel24 – with VDE-certified models from 16 A to 100 A, all pre-assembled in polycarbonate enclosures.

What is a Main Switch and What is it Used For?

A main switch (also known as load-break switch, repair switch, or emergency stop switch) is a manually operated disconnecting device according to IEC/EN 60947-3 and VDE 0660. It disconnects the entire system from the power source and prevents dangerous voltages during maintenance work. Typical installation locations:

• Control cabinet and sub-distribution
• Meter cabinet and house connection box
• Machinery and equipment (lockable per DIN EN 60204-1)
• Construction site distributors and outdoor installations

All models at ekabel24 come equipped with padlock locking, red-yellow handle (clear switch position indication), and IP65 protection – perfect for indoor and outdoor use.

3-Pole or 4-Pole Main Switch – The Key Difference

The most important decision when buying a main switch is the number of poles:

• 3-pole: Disconnects the three live conductors (L1, L2, L3). Ideal for TN-C systems or when the neutral conductor does not need to be disconnected. View all 3-pole main switches
• 4-pole: Also disconnects the neutral conductor (N). Recommended for TN-S systems, photovoltaic installations, critical applications, and full potential separation. View all 4-pole main switches

Which Main Switch Do I Need? The Most Important Buying Criteria

When selecting a main switch for control cabinet, distribution board, or sub-distribution, pay attention to:

• Rated current: 16 A to 100 A (e.g., 32 A for small systems, 80 A / 100 A for larger homes or commercial use)
• IP65 protection rating + polycarbonate enclosure (weatherproof, impact-resistant)
• VDE certification from 20 A (DIN EN 60947-1 / -3)
• Lockable with padlock (mandatory for machinery per BetrSichV)
• Connection cross-section up to 35 mm² and knockouts for cable glands

Tip: For the main switch after the meter or in the meter cabinet, 4-pole models with 80 A or 100 A are recommended.

Comparison Table: The Best Main Switches at ekabel24 (as of March 2026)

*Prices as of March 2026 – please check current shop prices.

Installation & Connection – How to Do It Right

Main switches may only be installed by a qualified electrician. Important notes:

1. De-energize and secure the system
2. Select appropriate cable glands (use knockouts)
3. Observe max. connection cross-section (up to 35 mm² for larger models)
4. Switch position red/yellow – always visible
5. Make lockable where required

Suitable accessories (cable glands, screw terminals) can be found directly in the product description.

VDE Regulations and Standards for Main Switches

All ekabel24 main switches comply with:

• IEC/EN 60947-1, -3 (VDE 0660)
• DIN EN 60204-1 (Safety of machinery)
• DIN VDE 0100-460 (Isolation and switching in low-voltage installations)

For machinery, the main switch must be lockable to prevent accidental re-energization (BetrSichV).

Frequently Asked Questions about Main Switches (FAQ)

What does "main switch" mean?

The main switch is the central disconnecting device that de-energizes the entire system – essential for safety and maintenance.

What is the difference between 3-pole and 4-pole main switches?

3-pole disconnects only the phases, 4-pole also disconnects the neutral. 4-pole provides complete isolation and is the safer choice in most modern installations.

Main switch with enclosure or without?

Models with IP65 enclosure are pre-assembled, weatherproof, and ready to use – ideal for control cabinets, sub-distribution, and outdoor areas. Pure DIN-rail versions are only for indoor installation.

Which main switch for sub-distribution or meter cabinet?

For sub-distribution: 3- or 4-pole 32–63 A; for meter cabinet/house connection: usually 4-pole 80 A or 100 A. All models at ekabel24 are suitable.

Is a lockable main switch mandatory?

Yes – for machinery and systems where accidental re-energization would be dangerous (padlock locking is standard on all ekabel24 models).

Main switch 80A or 100A – which one when?

80 A is sufficient for most single-family homes up to approx. 30 kW, 100 A for larger systems or commercial use with higher power.

Can a main switch be flush-mounted?

Most models are designed for surface mounting with enclosure. Special flush-mount versions are available – feel free to ask our team.

Which standard applies to main switches in control cabinets?

Primarily IEC/EN 60947-3 (VDE 0660) as well as DIN VDE 0100-460 for isolation and switching.

Where can I buy a main switch?

Directly at ekabel24.de – wide selection, immediately available, fast delivery, and expert advice.

Conclusion & Recommendation

Whether a 4-pole 100A main switch for the house connection, 80A for sub-distribution, or smaller 32A models for machinery – at ekabel24 you'll always find the right VDE-certified solution in a robust IP65 enclosure.

Go directly to the shop:

• View all main switches
• 4-pole main switches
• 3-pole main switches

Note on prices: The stated prices are current as of publication in March 2026 and may change. Please check current prices and availability directly on our website ekabel24.de.