Main Switches & Rotary Isolators
Main switches and rotary isolators provide safe disconnection of boards, machinery, or whole circuits. Essential for maintenance, emergency shutdowns, and compliance with UK wiring regulations, all stocked for next-day delivery.
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We stock isolators and switches for single and three-phase installs, with options including DIN-rail mounted main switches for consumer units, rotary isolators for machinery and outdoor supplies, and compact units for garage or EV boards. All devices are BS EN certified and backed by a 2-year warranty.
- Single & three-phase options – suited to domestic, commercial, and industrial use
- Rotary isolators – easy-to-operate disconnection, indoor or outdoor
- Main switches – DIN-rail mounted for consumer units and distribution boards
- Fully compliant – built to 18th Edition standards
Need meter isolators instead? See our Meter Isolation range. For returns, check our returns policy.
4 Pole 100A Main Switch
£8.94
The WCED WMS4100 is a 4 Pole 100A Main Switch designed for safe and reliable isolation of electrical distribution boards. Suitable for both domestic and commercial installs, it provides full disconnection across three phases and neutral, ensuring compliance with UK wiring regulations. Built to withstand...
Twin Screw 100A Main Switch 2 Pole WIS2100
£17.33
The WIS2100 2-Pole 100A Main Switch provides safe and reliable isolation for residential, commercial, and light industrial electrical systems. Designed with twin screw terminals for a secure and stable fit, this switch ensures strong connections that reduce the risk of loose wiring or overheating. Its...
What Are Main Switches & Rotary Isolators?
A main switch isolator allows the safe disconnection of an installation from the supply, while a rotary isolator is often used on machinery or outdoor circuits where fast, visible isolation is required. Both are vital for compliance and safety under the 18th Edition Wiring Regulations.
Applications
- Consumer units – DIN-rail main switches for board isolation. Example: 2-Pole 100A Main Switch.
- Industrial machinery – rotary isolators for motors, HVAC, and plant equipment.
- Outdoor supplies – IP-rated isolators for garages, outbuildings, or EV chargers.
- Maintenance & servicing – safe disconnection for contractors and site work.
Buying Guide
- Phase type – single-phase for domestic, three-phase for commercial/industrial
- Mounting – DIN-rail for consumer units vs standalone rotary housings
- Current rating – match to the load and board specification (e.g. 100A)
- IP rating – weatherproof isolators for outdoor applications
FAQs on Isolators & Main Switches
What’s the difference between a main switch and a rotary isolator?
A main switch is typically board-mounted for isolating a consumer unit, while a rotary isolator is a standalone device with a visible switch, often used on machinery or outdoor circuits.
Are isolators required by the 18th Edition?
Yes – every installation must have a main means of isolation. Rotary isolators are commonly specified where easy local isolation is needed.
Can I use a rotary isolator for an EV charger?
Yes – rotary isolators are often installed next to EV chargers to meet disconnection requirements. Pair with an EV consumer unit for full compliance.
Why Buy From Power & Data UK?
All switches and isolators are UK stocked, BS EN compliant, and backed by a 2-year warranty. Orders placed before 2pm ship the same day, with next-day delivery on orders over £30. Easy returns are handled under our returns policy.