Changing main switch on CU

[watson650]

Hi all

Just looking for some advice pls. I've been told that I need a new CU as the existing main switch has the wrong rating. Isn't possible to just change the main switch. Existing CU is Marbo.

Many thanks

 

[GLENNSPARK]

depends what In the bullit is....

 

[Tim]

Whats the existing rating? And what type of premisis is it?

 

[GLENNSPARK]

Hi all

Just looking for some advice pls. I've been told that I need a new CU as the existing main switch has the wrong rating. Isn't possible to just change the main switch. Existing CU is Marbo.

Many thanks

wylex, marbo, steeple, volex...their all the same....
its all electrium....

 

[driverman]

Have you been told why it is the wrong rating?

 

[chris222]

I think marbos are 100 amp main switch what's the problem

 

[oldtimer]

so if the main fuse is 60A and the main switch is 100 is that the wrong rating )

 

[watson650]

Sorry for delay. Didn't think I'd get a reply so quickly. I'll give a bit more info. The main fuse is 100A and the main switch is 80A. It's in a residential property.

 

[cotty]

Sorry for delay. Didn't think I'd get a reply so quickly. I'll give a bit more info. The main fuse is 100A and the main switch is 80A. It's in a residential property.

Odds on it is a 60A Fuse when pulled! Who told you to upgrade?

 

[Amp David]

Odds on it is a 60A Fuse when pulled! Who told you to upgrade?

Probably the tinker who's been there touting for a bit of workimp2:

 

[watson650]

Had a condition report done and he said that because the fuse was the wrong rating that I needed the CU replaced.

 

[watson650]

I asked that if it was an issue, couldn't we just replace the main switch with 100A switch. Apparently, that's not possible.

 

[diditrain]

Get a second opinion. Sounds like someone is trying it on.

 

[matthunt]

Hi Watson, remember your main switch is exactly what it says on the tin 'a main switch' all of your sub-circuits will be protected by MCBs/RCDs, in all likelihood your tails would be 16mm anyway. Obviously I haven't seen the job but I would guess you are ok with the 80amp main switch.

 

[telectrix]

simple job to change main switch, but i would not bother. can't imagine a domestic drawing over 80A at any time.