UK Working out Consumer Unit

[YGRose]

Hi All, first time poster here in a muddle.

I've got a mobile unit that's currently being wired up and I'm struggling to work out which consumer unit to use. Ideally the smaller the better as it's technically mobile, I would like to be able to use an industrial 3 pin plugin on it. I believe these go up to 63a as a blue euro pin.

I've currently got:
Lighting ring - Led but on 230V
Smoke Alarm - Lighting ring
Fans - On the lighting ring also
Mains Socket ring
Underfloor Heating @ below 1500w (prehaps 1250w)
Kitchen ring - Oven Fuse Spur
Electric Water Heater @ 11KW - Specifies 48A

Can anyone help with what Consumer Unit I can get away with? I'd really like to avoid trailing a 100a SWA and need for such a large load.

My guessing is for MCB's (MK) I'll need 1x6A 1x 16A 2x32A 1x50A to cover this. My question is, what RCD and Consumer Unit do I need for this?

Massive thanks in advance as this has been bothering me for a while!!

 

[Strima]

I'm confused, are you manufacturing this unit for sale to the general public?

 

[YGRose]

No, not currently, but electrics need to be safe regardless. I'm just not sure where it's final resting place will be.

 

[suffolkspark]

Are you actually qualified and competant to install, test and certify this? And also insured?

 

[SparkyAndGeorge]

What is the earthing system and is there any extraneous metal work within the unit?

 

[davesparks]

I can't do that as no single site does exists, just a few maybes. I am trying to work out what I need on the consumer unit side of things within the unit. As it currently does not have a home I can't give any specifics as to what the incoming options are, that would be up to another electrician on their side. Simply put I'm looking for the easiest way to hook the unit up and cater to its power needs.

I have stated I'm aware of the tankless gas heaters pulling less, although electric is actually cheaper to install, longer lasting and much more efficient.

Without knowing where it will be you can't know what size of supply is available, or the earthing and binding arrangements required.

This will likely need a 63A supply with that big water heater in it, but until you know where it is going you won't know how much capacity is available for it.

What is the unit constructed from, is there any metalwork? Is it a metal structure. Being road legal it presumably is built on some kind of trailer base, with wheels and stabilising legs? In which case for some types of electricity supply it will need to have its own earthing system created by the installation of earth rods as it could be dangerous to use the installations earth, for other types of supply it will be fine to use the installations earth.
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Ideally the smaller the better as it's technically mobile, I would like to be able to use an industrial 3 pin plugin on it. I believe these go up to 63a as a blue euro pin.

Can anyone help with what Consumer Unit I can get away with? I'd really like to avoid trailing a 100a SWA and need for such a large load.

Ceeform connectors are available in 16A,32A,63A and 125A

You will 'get away with' a consumer unit which has enough ways to serve all of the circuits you have. As far as I can see you have 5 or possibly 6 circuits so a 6 way CU will probably suffice (I can't see much need for spare ways in this application)
As for the physical size you'll just have to read datasheets to see how big they are, although choosing the smallest one will make it more awkward to work on.
You need to decide which circuits require RCD protection based on what they are doing and how they are installed.

If you are connecting it via a Ceeform plug it will use a trailing lead made from flexible cable to connect it, not an SWA. SWA is not suitable for making trailing leads.

 

[driverman]

What about using bottle gas for cooking?

 

[Lister1987]

Without knowing where it will be you can't know what size of supply is available, or the earthing and binding arrangements required.

This will likely need a 63A supply with that big water heater in it, but until you know where it is going you won't know how much capacity is available for it.

What is the unit constructed from, is there any metalwork? Is it a metal structure. Being road legal it presumably is built on some kind of trailer base, with wheels and stabilising legs? In which case for some types of electricity supply it will need to have its own earthing system created by the installation of earth rods as it could be dangerous to use the installations earth, for other types of supply it will be fine to use the installations earth.
[automerge]1581379670[/automerge]


Ceeform connectors are available in 16A,32A,63A and 125A

You will 'get away with' a consumer unit which has enough ways to serve all of the circuits you have. As far as I can see you have 5 or possibly 6 circuits so a 6 way CU will probably suffice (I can't see much need for spare ways in this application)
As for the physical size you'll just have to read datasheets to see how big they are, although choosing the smallest one will make it more awkward to work on.
You need to decide which circuits require RCD protection based on what they are doing and how they are installed.

If you are connecting it via a Ceeform plug it will use a trailing lead made from flexible cable to connect it, not an SWA. SWA is not suitable for making trailing leads.

TRS or Artic, I'd favour TRS bring more suited to temp changes?