Why More Electricians Are Choosing the Navitas N633P Rotary Isolator
- Navitas CP
- Jul 29
- 3 min read
RCBOs Protect but They Do Not Isolate
You finish the board. RCBOs are installed across the circuits. The solar inverter is connected. The heat pump is wired. The client is already asking about adding an EV charger.
You flick the main switch to test.
And the busbar is still live.
What just happened?
That is the moment you realise protection is not the same as isolation. The RCBO has done its job but it cannot disconnect the circuit in the way you need. The solar inverter is still feeding power back into the board. The system is live even though you shut it down.
Now imagine a service engineer arriving next year to inspect or maintain the inverter. There is no clear isolation. No lock off. No indication of what controls what.
That is when the Navitas N633P rotary isolator makes all the difference.
What Is the Navitas N633P
The Navitas N633P is a 63 amp triple pole rotary isolator that mounts directly onto the DIN rail inside the consumer unit. It gives you a visible and secure means of isolating key circuits. It offers:
✅ Lockable switching
✅ Direct DIN rail installation
✅ No surface boxes or trunking required
✅ Full alignment with BS 7671
It is not just an accessory. It is a real solution to real problems on the job.
Backfeed from Solar PV Is a Real Risk
When a PV system is generating, it can energise the board from the AC side of the inverter even if the main switch and grid supply are turned off.
Without a dedicated isolator between the inverter and the board, there is no safe way to disconnect it.
Regulation 712.537.2.1.1 of BS 7671 is clear. Every live conductor must be capable of disconnection. That means an RCBO alone is not enough.
The N633P gives you a compliant and compact way to isolate the AC feed from the inverter without compromise.
Heat Pumps and EV Chargers Require Isolation
For maintenance, servicing, and warranty purposes, most heat pump and EV charger manufacturers require local isolation.
Regulation 537.2.2.5 states that isolation must be placed close to the equipment and be easy to access.
The N633P solves this with a simple board mounted solution. No extra boxes. No wall clutter. Just a labelled switch that isolates the circuit clearly and safely.
Modern Boards Need Modern Isolation
Homes today are no longer powered from a single source. The average install may now include:
Grid supply
Solar PV
Battery storage
EV charging
Heat pumps
This is where confusion becomes a real risk.
Regulation 514.1.1 requires that every switch and isolator must be clearly identified.Regulation 464.1 confirms that every circuit must be capable of isolation.
By fitting a rotary isolator like the N633P for each key circuit, you give anyone who opens the board in future a clear and professional roadmap of the installation.
Why Wholesalers Are Stocking the N633P
This is not just about protection. It is about making the installation look and feel right.
Installers are choosing the N633P because:
It installs cleanly inside the consumer unit
It avoids the need for awkward surface switches
It meets every standard required for isolation
It looks better, functions better, and makes their work stand out
Electrical wholesalers are already seeing demand grow across solar, EV, and heating contractors. Stocking the N633P means offering your customers a product that solves a problem and builds trust.
Conclusion: Isolation That Matches the Standard of Your Work
The Navitas N633P rotary isolator is not just a switch. It is a statement.
It shows that you take safety seriously. That you understand the standards. And that your work is built to last.
If you are working with solar systems, EV circuits, heat pumps, or multi source consumer units, this is the product that brings clarity and control to the heart of your installation.
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