See what you make of this.....

[sythai]

Just going over some plans and trying to work out what they actually want for the CU (gone round it in red ) There's hardly anything going in there but it states :

new power db, lighting db & heat/vent db separately metered as L2 regulation

???? (that plan hasn't come out too well - just trying to re-do ) View attachment 10147View attachment CU.pdfView attachment CU.pdf View attachment CU.pdf

 

[Engineer54]

Can't rally see or read much of your drawing layout, but hazard a guess that this maybe connected to a central HVAC system and the Fan Coil Units shown on your layout. These being separately metered....

 

[Guest123]

Is this a new build or refurb???

 

[sythai]

It's an extension and internal alterations.........

 

[sythai]

This should be better.. ?

 

[Guest123]

Approved document L (2A), does call for separate metering systems for power, lighting & heating so the fuel used can be attributed to each item.

In your case......

http://www.planningportal.gov.uk/uploads/br/BR_PDF_ADL2A_2010.pdf

 

[sythai]

Many Thanks Lenny thats a great help:smiley2:

3 x CUs and each with there own kWh meter then - seems quite extreme ( there will only be 2 or 3 circuits max on each CU!)

Oh well if that's what is required, then that is what I will price for..

 

[Engineer54]

Many Thanks Lenny thats a great help:smiley2:

3 x CUs and each with there own kWh meter then - seems quite extreme ( there will only be 2 or 3 circuits max on each CU!)

Oh well if that's what is required, then that is what I will price for..

It's a bloody nonsense, that's what it is!! Who the hell came up with that classic anorak requirement??

 

[sythai]

It's a bloody nonsense, that's what it is!! Who the hell came up with that classic anorak requirement??

Have queried it with the contractor...? Is a joke on something of this size !!

What next a meter installed next to every s/o

 

[Guest123]

On larger projects we use dual metered DB's for power & lighting.

In your case it may be a bit OTT for 2-3 circuits max.

Might be worth looking to see if a small unit exists that would suit your needs.

 

[CrazyScozzese]

Sure they don't just mean SEMS?

Go the Power Management - Schneider Electric

 

[ipf]

Don't know the full facts, but it looks like some idiot behind a desk has been daydreaming. Like you say, info given, quote to spec. I think I'd have a chat with the designer though.

 

[Engineer54]

On larger projects we use dual metered DB's for power & lighting.

In your case it may be a bit OTT for 2-3 circuits max.

Might be worth looking to see if a small unit exists that would suit your needs.

What the hell is that all about then?? If your on a larger project, i would imagine it would be serviced by a BMS system!! Those systems can monitor and tell you exactly what you need to know, without this totally insane double/dual metering. So what is this supposed to achieve at the end of the day then, you'll still be using exactly the same total KW-hr ??

First i've ever heard of this set-up!! lol!! I'd hazard a guess shall i, ...It's to penalise companies that some obscure authority, thinks is using too much electricity!!...lol!!

 

[Guest123]

They are hot on metering everything individually here now.

Schools, hospitals, care homes etc etc.

Basically, anything in the public sector must be seen to be doing it's 'bit'. TBH in anywhere without a commercial kitchen where outside contractors are used to supply food services, separate metering is a bit pointless and just creates a non job for some jobsworth to ensure that the establishment is toeing the line WRT energy efficiency.

Schneider are the usual set up's we use but Dorman-Smith also have a good versatile range of suitable DB's.

 

[Dic Penderyn]

Hi all!

You could alway install a compact meter for each circuit within your CU, instead of a meter and CU for each circuit which seems like an absolute load of tosh.


View attachment LibraryABB_electricity_meters_29568.pdf

 

[sythai]

You could alway install a compact meter for each circuit within your CU, instead of a meter and CU for each circuit

If money was no object then that would be fine..... bet there not too cheap !

which seems like an absolute load of tosh.

Hit the nail on the head there....

 

[Engineer54]

I think separate or dual metering is pointless no-matter where it's being used!! I honestly can't see a single justification for it. I suppose that the DNO will also be setting a separate service charge for each meter it supplies too, or is this dual metering on the consumers side only?? No- matter how many meters your going to add to an installation, measuring whatever, ...the final KWhr usage will remain the same.

It's just an expensive set-up, that really doesn't achieve anything except giving some faceless bureaucrat(s) sets of meaningless figures that they can play around with, and come up with even more useless figures, normally called statistics, and we all know how well they stand up to any scrutiny!! lol!!

 

[Knobhead]

It must be my sick mind;
“Sorry Mrs. Brown your ward cubical has used it’s allocation of power for the day. But I’m sure you’ll manage without life support for a couple of hours”. CLICK

I’m with everyone else on this, it’s worthless work creation.

 

[mad house]

is it to do with the luxury AC carbon footprint monitoring and IMO soon to be taxed load of excrement

 

[jase]

I read it that that DB is to feed lighting power and HVAC and is to be metered seperatly, not that the lighting power and HVAC are to be metered seperatly.

Eaton Electrical United Kingdom | Eaton MEM - Memshield Metering Solutions

 

[sbrown2]

What type of HVAC unit is it? Is it to cool only or is it to heat also? How much do the meters cost? I think I've seen the ABB ODIN in use for £180 on a HVAC unit. What is the cost of metering against the whole project?

I agree with most whats been said. But on sites after power factor correction there is still large wastage of power. Maybe localised metering is the start of introducing a building management system.