B & B Design

[sparky87]

Hi people,

Have a new luxury B&B to design and install and thought I would get thoughts on the design.

Internally it will have a dining area, hall, toilets and, 6 en-suite bedrooms (1 upstairs)

This is going to be a royal pain to wire as mostly is vaulted ceilings with baths located within the rooms!

My initial idea is to supply communal areas via the incoming 3 phase DB and then feed a 25Amp SP sub main to each room. Then wire 20A socket radial and 6A lighting from local DB for each room.

was thinking of using earth shield cable for the sub mains so no rcd required then rcd main switch in local DB or RCBO's for standard T&E final circuits.

Thinking of using local DB's for ease of wiring due vaulted ceilings and then each room will be independent of each other.

Any ideas etc would be much appreciated.

Thanks Adam

 

[Pete999]

Hi people,

Have a new luxury B&B to design and install and thought I would get thoughts on the design.

Internally it will have a dining area, hall, toilets and, 6 en-suite bedrooms (1 upstairs)

This is going to be a royal pain to wire as mostly is vaulted ceilings with baths located within the rooms!

My initial idea is to supply communal areas via the incoming 3 phase DB and then feed a 25Amp SP sub main to each room. Then wire 20A socket radial and 6A lighting from local DB for each room.

was thinking of using earth shield cable for the sub mains so no rcd required then rcd main switch in local DB or RCBO's for standard T&E final circuits.

Thinking of using local DB's for ease of wiring due vaulted ceilings and then each room will be independent of each other.

Any ideas etc would be much appreciated.

Thanks Adam

Earth shield cable for sub main??

 

[TJ Anderson]

Earth shield cable for sub main??

He is referring to LSX cable so to not RCD subs (I am assuming concealed <50mm in wall otherwise not required). It complies to BS8436. SWA would be cheaper though and also comply.

 

[sparky87]

He is referring to LSX cable so to not RCD subs (I am assuming concealed <50mm in wall otherwise not required). It complies to BS8436. SWA would be cheaper though and also comply.

yes was meaning LSX complying with bs8436. could use armoured with a flush mounted metal DB I suppose but only used 10/15 way flush boards, never looked for smaller flush DB if any one knows if you can get one?

Also any advise on other ways and wiring routes for vaulted ceilings etc would be much appreciated

thanks

 

[shanky887614]

yes was meaning LSX complying with bs8436. could use armoured with a flush mounted metal DB I suppose but only used 10/15 way flush boards, never looked for smaller flush DB if any one knows if you can get one?

Also any advise on other ways and wiring routes for vaulted ceilings etc would be much appreciated

thanks

can you pm what your getting lsx for? i have never had it from local wholesalers and its 3 times the cost of twin at screwfix online

its quite expensive from what ive seen

£1 a metre for 2.5mm

cheaper to buy swa

 

[Leesparkykent]

Catenary wire.... Lol ,joking! Is it mostly stud walls or solid?

 

[davesparks]

yes was meaning LSX complying with bs8436. could use armoured with a flush mounted metal DB I suppose but only used 10/15 way flush boards, never looked for smaller flush DB if any one knows if you can get one?

Also any advise on other ways and wiring routes for vaulted ceilings etc would be much appreciated

thanks

You can just as easily use SWA with a surface mounted DB as a flush one.

 

[shanky887614]

You can just as easily use SWA with a surface mounted DB as a flush one.

or simply leave a bit of slack on so you can terminate it then fix box to the wall

 

[sparky87]

or simply leave a bit of slack on so you can terminate it then fix box to the wall

Regarding wall- mainly all block work with only en-suite walls stud within rooms so looks only option is clipped top of wall a joining slope roof or top of cavity under roof beems.

at least the lsx or swa I will be able to run wherever I want like the plumbers pipes!!

Flush board- guess I could leave swa floating with 3 core and just have armoured connected at man DB!

LSX cost- never brought it but is expensive around 1.60 a meter for 2.5 2c +e and ill need at least 4mm!!

would you guys do each room with db or 2/3 room together on same ring/lights from main DB?

cheers

 

[sparky87]

Also i'm presuming that putting a bath in the bedroom will also require mechanical ventilation within room to meet building regs? and sockets more than 3m! They want emergency lighting in each room which will give a nice green glow at night! not!

 

[sparky87]

Adam W- why main switch via contactor?

 

[GEOFF S]

Is it a problem runing the circuits from a DB next to the 3phase DB, all circuits could be protected via rcbo and standard cable useable, no extra dbs to install?

Cheers

 

[davesparks]

at least the lsx or swa I will be able to run wherever I want like the plumbers pipes!!

Flush board- guess I could leave swa floating with 3 core and just have armoured connected at man DB!

You're not an electrician then?

 

[Fin170]

could use armoured with a flush mounted metal DB I suppose but only used 10/15 way flush boards, never looked for smaller flush DB if any one knows if you can get one?

tlc-direct.co.uk/Main_Index/Consumer_Units_Index/CP_Range_Main_Switch/index.html

Bottom of page

 

[Leesparkykent]

tlc-direct.co.uk/Main_Index/Consumer_Units_Index/CP_Range_Main_Switch/index.html

Bottom of page

https://www.tlc-direct.co.uk/Products/CP04MFC.html