2 x Main Switches in on consumer unit

[mainline]

question! are the 2 additiona Switched fed through the main one, or are all three connected parallel?

The main switch isolates the other two basically the same as a dual rcd cu

 

[KashBag]

The main switch isolates the other two basically the same as a dual rcd cu

Cheers, it does make sense, but it is not incorrect to connect them in parallel right? Or is there a requirement to have one main disconnection point in the CU?

 

[Risteard]

Cheers, it does make sense, but it is not incorrect to connect them in parallel right? Or is there a requirement to have one main disconnection point in the CU?

The actual main switch must isolate everything.

 

[EricMark]

You should have one main switch which isolates the whole installation.

I was told that for years, however my house has a few, the DC isolators, the UPS isolator, the DNO isolator etc. And at work one building has at least three DNO supplies, maybe four.

 

[Rockingit]

My issue with this thread isn't about design aspects of combinations of isolators, it's about who is installing, testing and certifying a Part P notifiable project.......

 

[mainline]

I was told that for years, however my house has a few, the DC isolators, the UPS isolator, the DNO isolator etc. And at work one building has at least three DNO supplies, maybe four.

If a board is marked up as having a main switch then it should isolate that DB so that there is nothing live after that main switch.

 

[davesparks]

I was told that for years, however my house has a few, the DC isolators, the UPS isolator, the DNO isolator etc. And at work one building has at least three DNO supplies, maybe four.

Yes, I was referring to simple installations such as domestic as that is what the thread is about. I also said should rather than must because I know it's not always possible.

But as a general rule there should be a main switch to isolate the whole installation, If there isn't then suitable labelling to identify the multiple sources of supply and their respective isolators is required.

Outside of a simple installation it obviously can get a lot more complicated.
For one of my customers the only way to fully isolate the building is a phone call to UKPN to get the 2x 11kV incoming supplies switched off.