Hi, thanks for your replys ! I would like to connect new meter to existing MCB and run a large spur from it to feed the steamer which is only 4meter cable run from the board. I know I will need to connect that spur to a fused socket.
This is simply NOT POSSIBLE.
Firstly, you need to understand that a single phase "fuse box" as you put it, is COMPLETELY different to a three phase one, so what you want to do is simply not possible..
Secondly, you need to understand that you,
or any electrician, WILL NOT [you absolutely need to understand this] be connecting the new meter to ANYTHING, that is not how it works.
Now, do you know what meter tails are?? They are the thick grey cables in your photo that connect the fuse box to the meter. There are two of them yes??? Now, when they fit the new meter, there will be four of them instead. The longest you are allowed to have these meter tails is three meters, so, it follows, that realistically, [unless you want to install a "submain", and trust me, you do not, [more £££] the new "fuse box" CANNOT be any further than about
2 or 2.5 meters from the new meter.
How it works is this;
Firstly you need to get an electrician to come along and install you a separate three phase "fuse box" Then they could connect a short run of cable to a three phase socket for you if that is what you want.
The electrician will install the meter tails to your new "fuse box" and leave them dangling loose at the ends that connect to the meter.
Then, the electric company will then come along and fit the new meter to your new meter tails, PROVIDED that is, that ONE, they like the look of what they see, TWO the tails are not longer than three meters, THREE they are shown a completed EIC [it is a certificate the electrician will give you]
If they are not happy with all three, they will simply refuse to fit the meter and send you a hefty bill for their time...
john..