10 Bedroom house rewire. Ring or radial?

[Moaz]

Guys, I'm wiring a ten bedroom house which has 4 floors. Correct me if I'm wrong, but as fat as I know, new regs says to keep each room on a radial. So shall I keep each room on a radial or have a few rings on each floor after calculating the maximum demand??

 

[AJshep]

Anyway Moaz wire it how you like. You know the property and it's layout.

Just be aware of you cable lengths and do your calcs...and you may need to do 4mm radials if the property is that big..

R1+Rn (which you can get from Onsite guide)multipled by the rating of fuse you want to use multipled by the correction factor of 1.2 (70c)

Simple job done.

 

[Marvo]

HMO?? I'm thinking her majesties something?

 

[elsparko]

Anyway Moaz wire it how you like. You know the property and it's layout.

Just be aware of you cable lengths and do your calcs...and you may need to do 4mm radials if the property is that big..

R1+Rn (which you can get from Onsite guide)multipled by the rating of fuse you want to use multipled by the correction factor of 1.2 (70c)

Simple job done.

not if there are seperate CU's on each floor, depends how big the "floor" is though, it might be 10 small box rooms or david camerons house

 

[Marvo]

Surely if the implementation of arc protective devices is imminent this would be another reason to use radial circuits...??

 

[AJshep]

not if there are seperate CU's on each floor, depends how big the "floor" is though, it might be 10 small box rooms or david camerons house

Your right it could be very small but the OP is the one who's been there
I think Moaz said it was large, he didn't say if the DB on each floor was at the middle or the end of the house. So who knows how long the radial could end up being.

 

[Octopus]

Surely if the implementation of arc protective devices is imminent this would be another reason to use radial circuits...??

and how can they be tested?

 

[Octopus]

HMO?? I'm thinking her majesties something?

House of multiple occupancy

i.e. where a property is let out "by room" and the landlord lives else where .................

a very big hot potato ATM

 

[Marvo]

Student digs type places?

Why a hot potatoe?

 

[elsparko]

too many variables to assess from offsite basically

 

[elsparko]

Student digs type places?

Why a hot potatoe?

more like an old folks home, their own rooms sometimes their own toilet, shared kitchen and living area

 

[Octopus]

Why a hot potato?

Because they need to be licenced / registered with the local authorities, inspected and subject to more stringent tests etc than a normal domestic property.

A single room in my patch (in a scruffy area) can easily be "worth" £500 per month, so convert the lounge and dining room and hey presto a 3 bed house is now a 5 bed HMO - so £2500 per month or £30,000 per year .....

Then there are cash payments and loss of tax revenues

I could go on

 

[elsparko]

Because they need to be licenced / registered with the local authorities, inspected and subject to more stringent tests etc than a normal domestic property.

A single room in my patch (in a scruffy area) can easily be "worth" £500 per month, so convert the lounge and dining room and hey presto a 3 bed house is now a 5 bed HMO - so £2500 per month or £30,000 per year .....

Then there are cash payments and loss of tax revenues

I could go on

we had a landlord try convert their 3 bed house to a hmo, they didnt split the ring upstairs where all the rooms are though lol, still it will be something for the tenants to fight over when the bill comes in

 

[Toneyz]

Guys, I'm wiring a ten bedroom house which has 4 floors. Correct me if I'm wrong, but as fat as I know, new regs says to keep each room on a radial. So shall I keep each room on a radial or have a few rings on each floor after calculating the maximum demand??

What new reg it that? what reg are you referring to that gives you that impression? however, if that is the/your design there is nothing wrong with it it is in my view a bit OTT unless there is more to this house than a family house.

 

[Marvo]

Because they need to be licenced / registered with the local authorities, inspected and subject to more stringent tests etc than a normal domestic property........

Do they have specific extra requirements on the electrical side?

 

[Octopus]

Do they have specific extra requirements on the electrical side?

fire / smoke alarms, how they are wired, em lights (I think)


Most are horrible so I avoid them like the plague

 

[Adam W]

Do they have specific extra requirements on the electrical side?

I don't know about "requirements" but I've just rewired a house which is being turned into an HMO - they wanted the fire detection to comply with LD1, emergency lighting on the escape route and in the lounge and kitchen, and for some reason the lighting in those areas permanently on.

 

[Octopus]

we had a landlord try convert their 3 bed house to a hmo, they didnt split the ring upstairs where all the rooms are though lol, still it will be something for the tenants to fight over when the bill comes in

Why .......... if the tenancy agreement says the bills will be split evenly , then evenly split they will be..............

There is no requirement for separate circuits in bedrooms AFAIAA

 

[Marvo]

Does the fire detection equipment and emergency lighting fall under the 7671 electrical installation regs or under building regs?

 

[7029 dave]

all I can do. but steaming inside. lol

 

[Octopus]

Does the fire detection equipment and emergency lighting fall under the 7671 electrical installation regs or under building regs?

These are not contained within BS 7671 ......

 

[Adam W]

Why .......... if the tenancy agreement says the bills will be split evenly , then evenly split they will be..............

There is no requirement for separate circuits in bedrooms AFAIAA

Generally speaking an 'official HMO' (as opposed to a house share between friends) would be occupied by a certain type of person - the kind of person who needs somewhere warm and safe to sleep as opposed to someone who has chosen to live there.
The rents are often inclusive of bills since you don't get any extra housing benefit to cover them, and to make things simpler.

 

[Toneyz]

Murdoch, are you still assuming this is nothing more than a large family house as when I did four large houses down Ascote as the floor area was over a certain area it had to be an LD1 system under the building regs (at the time) nothing regarding emergency lighting.

 

[elsparko]

Why .......... if the tenancy agreement says the bills will be split evenly , then evenly split they will be..............

There is no requirement for separate circuits in bedrooms AFAIAA

what if 1 tenant is operating a grow factory and the other 2 rooms have t.vs, bedside lamps etc?

not exactly an even split is it

 

[Octopus]

Murdoch, are you still assuming this is nothing more than a large family house as when I did four large houses down Ascote as the floor area was over a certain area it had to be an LD1 system under the building regs (at the time) nothing regarding emergency lighting.

No ........... its Marvo's question about HMO's that has taken it a bit off topic

 

[Octopus]

what if 1 tenant is operating a grow factory and the other 2 rooms have t.vs, bedside lamps etc?

not exactly an even split is it

TOUGH

 

[elsparko]

TOUGH

 

[Andy78]

Does the fire detection equipment and emergency lighting fall under the 7671 electrical installation regs or under building regs?

I think they generally quote the housing act with reference to building regs as an accepted standard.