http://www.theiet.org/forums/forum/index.cfm?forumid=1 FuseTalk Standard Edition http://www.theiet.org/forums/forum/messageview.cfm?catid=205&threadid=52997 2013-06-19T21:51:58 00 EMERY 3 H07 installed on Cable Ladder
They will run from the UPS to a functional earth bar connected to an independent earth electrode
These are only for functional purposes and not for protection

Should they be cream the whole length of the conductor, or can they be marked at the terminations only.

BS7671 only refers to an earth conductor used as protection or combined in which case they should be green and yellow for the full length of the cable Richard Emery]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=205&threadid=52995 2013-06-19T20:44:05 00 Ampman 4
Ive been asked to look at a intruder alarm ,

Do i need to certify it if i install or fix one ?

Or do i need to be qualified in intruder alarms ?

Thanks]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=205&threadid=52988 2013-06-19T12:51:55 00 steviestrikes 12
1) Can someone confirm in which year white-sheathed flat cable was introduced (I know it went grey again in 2005) - and also confirm that it hadn't been issued before that?

2) in what period was 3-core flat cable with insulation coloured red, white and blue used? (I don't think I've ever seen this with a cpc, has anyone else)?

Thanks in advance.

(Any other pointers for assessing the ages of installations welcome).]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=205&threadid=52986 2013-06-19T10:57:46 00 leckie 4
Somewhere in GN3 seem to remember there was reference to a height for inspection and testing. Something like 2.2 meters without specialist access equipment? I can find it now, does anyone remeber where is is? Or did I dream it!]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=205&threadid=52984 2013-06-19T08:42:06 00 davebp 7
Thinking about installing some LED dimmers like these:

LED dimmer unit

So, I'd use one 12V LED driver to feed several of these units, which would then feed LED tape / spots in a kitchen, - wiring all plastered in.

Would you use standard twin & earth, keeping the CPC electrically separate from all fittings and the secondary side of the PSU, - this would be cheapest and provide the option of returning the wiring to LV if preferred at some point in the future.

Or would it be better to use a different cable type to identify the wiring as being different from the LV wiring? - Also, as it would be a DC system, is there a requirement to sleeve conductors of whichever cable is used in brown / grey as per table 51?

Thanks,

Dave.]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=205&threadid=52983 2013-06-19T07:41:35 00 SherlockOhms 2
When selecting the Address book icon to auto fill customers details it crashes the system. I tried this twice on Minor works and didn't bother again.

When filling in IR readings the keyboard apears but doesn't allow access to anything other than numbers. ie it's impossible to access the + symbol.

Why can't the software adopt the Apple auto captial select when filling out names or addresses? Not a major but annoying when it exists on the same piece of hardware.

S.]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=205&threadid=52981 2013-06-18T21:22:14 00 Ampman 15
I quoted a job to relocate some light fittings in a house centre them to the rooms , from near the windows ,

Builder told me floors upstairs would be accessable because he was ripping up laminate floors ,

He rang me yesterday to tell me to come & do the job . i asked weather he ripped floors up yet . to be told floors now being kept .

but lights still want relocating .

now i still want to gain access underfloors but builder has asked me to slot the plasterboard either side of a joist & clip cable in the slot ?

Im not keen .

circuit is rcd protected.]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=205&threadid=52979 2013-06-18T19:38:52 00 wylexman 8 im in the middle of fitting a 3 phase fuseboard to a new supply in a barn to be used as a little garage workshop, theres stickers on the new supply saying its a pme system but i thought barns and commercial was tt.
ive tried phoning the local electric board but as usual dont get anywhere.
many thanks.]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=205&threadid=52978 2013-06-18T19:06:24 00 kirchoffs 16
http://www.mkelectric.com/en-g...%20Module%20Flyer.pdf

Regards Dominic]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=205&threadid=52977 2013-06-18T18:45:33 00 BrucieBonus 4
Did I imagine it, or was there an article in Wiring Matters in the last year on this topic? I can't seem to find it, so if anyone can point me in the right direction, I'd be very grateful

thanks

BB]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=205&threadid=52974 2013-06-18T16:32:02 00 Pacific 5 http://www.theiet.org/forums/forum/messageview.cfm?catid=205&threadid=52970 2013-06-18T12:28:32 00 Vikko 6
A property manager that has just taken over a block of flats asked me to repair a faulty light in an Otis Gen 2 lift, they don't know if there is a maintenance contract for said lift in existence. Had a look, couldn't work out how to get at the tubes, was hoping someone on here might know. The control panel/facia runs top to bottom of the car with a full length plastic diffuser either side for the 6ft tubes. I thought they might just prise off but have given them as much force as I dare to no avail. Obviously i'm not a lift engineer, just a sparky but I thought i'd ask before recommending the manager contact a lift engineer.

Thanks in advance. Tom.]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=205&threadid=52966 2013-06-18T06:09:19 00 fitzpatrick1976 2
I need help with this safety critical piece of equipment.

I have two Drexelbrook HHLA's installed on two different tanks on a petrochemical storage facility.

They are being fed from series 401-400 line monitoring receivers (barriers). These receivers are being powered from the excact same power supply.

The problem is that one of the HHLA's has intermittently stopped working. The electrician tested the voltage that is being outputted form the barrier to the HHLA probe and it is 10.22V, which is too low to power the HHLA correctly. When the voltage is this low there is no fault alarm or HHLA LED on the line monitoring receiver which makes it useless. If the electrician turns off the power supply to the line monitoring receiver and then powers up again the voltage increases to 13.32V and stays this way...... which then has everything working correctly, until it intermittently drops again at a later time.

When I replaced the barrier and HHLA with another one from another tank that did work before - it did exactly the same????

Please let me know what can cause this voltage drop......]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=205&threadid=52963 2013-06-17T21:42:21 00 Fm 3
Existing installations, well maintained.
No issues with rodents etc.
I personally dont think its practicable to isolate the whole db to add singles in the trunking from the field point to the db.
Everything Ip2X
MS/RA For work, connecting into existing CPD.

Do you kill the whole board or not?
Work taking place during normal hours]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=205&threadid=52962 2013-06-17T21:35:03 00 Ampman 6
Lorry ripped a swa cable out of a joint box through the metal gland

RCD did not trip

Cable live when i arrived dangling near metal work outside ,

Looking at the outside light installation none of the swa has been earthed & glands made off into plastic ip boxes .

My question as above if the armour glands had been earthed then the rcd would of operated ?

Cheers

Ps ive earthed my swa but rest of swa not earthed im to make the client aware .]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=205&threadid=52961 2013-06-17T20:56:14 00 earthing 18





Hi,

I have just started working for a company installing solar panels. Lets just suffice to say that the previous electrician has left a trail of destruction.

I want to describe exactly what I found today and ask some questions which I hope someone has the answer for!

Firstly, the customer came downstairs to a smoking fuse board. She called and I advised her to isolate her solar installation both d.c and a.c

When I arrived I disconnected the fuse board and discovered that the terminated copper conductor had missed the cage/clamp and must have been loose arcing etc etc.

So first question: Should the fuse have operated?

My understanding is with arcing the current rises thus causing heat and eventually fire. The mcb pictured is the fuse responsible for connecting the inverter to the grid.

As I am sure you will have picked up on, the electrician has also wired a 2.5mm Twin & Earth directly off a 100amp isolator.

Apart from being a potential fire risk this is where my second question is.

With this installation, there were four consumer units. One for sockets, one for lights, one for a shower and one for a garage. The boards were all wired back to Henley blocks.

The customer complained that she was not seeing much savings on her electricity bill despite managing her usage to heavy loads during the day and avoiding heavy use at night.

My question here is concerning metering and the path of the current flow. Is it possible that the customer is not saving as much as she should be? So in the above case only saving on her lighting because thats what the solar array is connected to?

I have always taken separate supplies from the mains via 16/25mm tails. I have never really understood how you can be able to generate and export via the same cable. I understand that a.c flows both ways 50 times per second and that the inverter syncs with the frequency but if someone has some way of explaining this scenario I would sleep better tonight. Just dont understand exactly what is happening here.

Im finding this one difficult to articulate but each CU will draw what it requires from the grid so doesnt this work both ways and the customer will only save on the CU connected with the array.

Can anyone explain that with ohms law or something!!!???

Thanks for your help!]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=205&threadid=52960 2013-06-17T20:39:17 00 drbreezy 10 http://www.theiet.org/forums/forum/messageview.cfm?catid=205&threadid=52959 2013-06-17T20:17:40 00 DOUGIE1000 5
Gas bottles are sitting outside on the ground with a chain tied to wall to stop them falling over.]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=205&threadid=52949 2013-06-17T11:34:26 00 beaver74 11
Pricing up a new build that needs 7 sky+ feeds through out. now I normally don't get these jobs. obviously I will be using satellite quality ct100 and keeping clear of mains cable. but my question is how are these systems wired.

I know sky +needs 2 coax's
but do these:
1 go to a central device and get spit from there.
2 go around the house on a daisy chain
3 need a separate coax from the LNB 20 each point (there a 7 in total)

any help would be most welcome
Beaver]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=205&threadid=52937 2013-06-16T19:41:14 00 Grumpy 3 I have a situation where a two storey house is to be let. It has inter linked mains smoke alarms on the ground and first floor only. Do all the smoke alarms have to be fed from the same lighting circuit or can the additional one on the second floor be run off the second floor light circuit. The wording of the Building regs says "regularly used lighting circuit" singular. I can't see any particular issues with it and the inter linking would be RF. It would be buggeration indeed to get a supply from the ground floor lighting circuit to the second floor.]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=205&threadid=52936 2013-06-16T19:06:45 00 Ampman 3
Got to install a light above hot tub light will sit approx 1.5 mts above the hot tub .

also got to install a socket approx 2 mts away from hottub

hot tub located in garden

Pme house

TT at hottub stake adjacent .

Should i TT the socket & light ?

Socket being fed via house sockets light fused down from socket

cheers]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=205&threadid=52935 2013-06-16T15:02:17 00 Sammyh20 8 http://www.theiet.org/forums/forum/messageview.cfm?catid=205&threadid=52934 2013-06-16T13:23:21 00 DR2366 3
I can't seem to find a sample copy to look at anywhere online.

Thanks]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=205&threadid=52933 2013-06-16T12:15:37 00 keylevel 2
Where's the best place to go for a system that gives a main powered wireless base and a battery-powered wireless option?]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=205&threadid=52932 2013-06-16T11:15:43 00 microy 34 The hook-up and the caravan are both protected by 30mA RCDs.
I am getting 1.58 Ohms so it appears to comply but this obviously affects the Zs readings inside the caravan and thereby the disconnection times.
All reading in the caravan are ok except high zs on all circuits.
Advice saught on coding.
Mike]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=205&threadid=52929 2013-06-15T08:08:50 00 alanblaby 2
£120 inc. VAT, with the 'dangling carrot' of £50 of RF goods free. OK, may be worthwhile, as I know nothing about it, so I booked it, and went yesterday.

It was booked as 9 until 5. Actual time, 9 until 3.30, but could have been finished by 2, and if no dinner, by 1pm.
Presentation was good, with a range of the kit all shown in use, practical uses, how to use it, how to program it.
It is really simple, and nothing to be feared, very simple to install and program. Some good ideas, such as where a 2 gang switch can be used to control 4 appliances, and being RF, does not need any switch wires, so the switch can be put anywhere, or, a small remote can be used to do the same thing.

The kit shown was good, and seems to be good quality. However, when asked how much things cost, the answer was dodged every time.
Of course they didnt want you to know how much it cost, as the price was ridiculous. We didnt find out from the Presenters, we got our phones out and googled, to find a single light (2/4 way) and actuator RF switch would be roughly £130.

The fixed controller for central use was £400+.
Now, for 'normal' use, you'd be laughed off site when quoting such prices, so this kit was only ever going to be for high-end customers, even then, I would find it hard to try to sell such a system, which has one point of failure - the controller, whereas a typical house would have the many services (alarm,heating, lighting etc) all separate.

For some applications, such as adding a new light switch without doing any chasing/decorating, it could be a good thing, albeit a rather expensive one.

Then we get the 'free' goods. This was somewhat of a disappointment. I would have expected a rf switch and actuator (but on seeing their price, maybe not). We got a RF controlled plug-in socket, and a key fob remote to control it. The type of thing that Toolstation sell for £15 for 3. Being as I already have 3 of these, it is of little use.

It was good to see how these things work, but, I really should have read up beforehand to see how simple it was, and not bother paying to be told.
Far too expensive at £120. For £50, it would have been worthwhile, especially as it really could have been shown in 4 hours, and not padded out after dinner.
The kit is good, but too expensive, which they know, as they will not say how much it costs.
Overall, I'd say avoid this day of salemens pitches. If you want to know about it, give them a ring and ask for their brochures, all the stuff is in there.

Alan.]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=205&threadid=52925 2013-06-14T15:18:14 00 clarky280 14
Im after a bit of feedback regarding interconnected neutrals. Would appreciate some discussion on this.

There is a scheme where a generator and a transformer are connected to a main LV switchboard with three-pole devices, and there is a single neutral-earth link on the main switchboard, load side.

The generator and transformer are not intended to operate in parallel - i.e. they will be a break before make on return to mains.

Also, there is a circuit breaker connected to the generator for connection of a load bank to test the generator. With this scheme it is conceivable that both sources will be energized, supplying different loads and sharing a neutral-earth link on the main switchboard. The neutrals of both sources will be interconnected by virtue of the three-pole devices.

One problem I could envisage in this scenario is that an earth fault in the generator system could circulate to the main switchboard and possibly cause tripping of earth fault protection if present.

Is there any other practical considerations anyone can think of, or is there anything within one of the relevent standards (7671, 7430) that prohibits the neutrals being connected?

Thanks]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=205&threadid=52920 2013-06-14T12:39:31 00 dp11 3
I have seen a large number of mains cables with a BS1363 mains plug and a C5 connector. The fuse in the plug is 5A. The C5 connector is rated at 2.5A.

I know the fuse is designed to protect the mains lead, but should it also include the C5 connector?

Should should C5 leads only be supplied with 3A fuses ?

Thanks

dp11]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=205&threadid=52913 2013-06-13T22:31:14 00 whjohnson 8
They were keen to show me some new switchgear etc that they were stocking.

Story goes:
Havells (India-based) used to have an exclusive deal to make the mcbs for all Wylex switchgear & distribution systems.

Schneider takes over Wylex and insists that Wylex now uses Siemens for its mcbs/rcbos.

Eaton takes over MEM and one of MEM's former star employees/designers leaves to take up design work for Havells.

That's the politics out of the way.

Had a good look at a Havells 8 way 3 phase board and it looks quite nice. In fact, it is very reminiscent of MEMSHIELD 2 stuff. Heavy gauge steel sheet and very robust looking. Nicely finished and supplied with optional-fit paxolin inserts for top and bottom entry.

Prices aren't bad either, with an 8 way coming in at around £82+vat.
4 pole disconnector coming in at £34
Single pole Type C mcb £5.27
3 pole Type C mcb £22.71.
Type C 10KA rcbos are £29 (Type B 6KA £16)

They also do a domestic 2 x RCD 10 way CU with mcbs for £48.

Has anyone used this stuff, and if so, what are your views?]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=205&threadid=52912 2013-06-13T21:16:41 00 Ampman 13
Customer still has not had cert from council

Anybody know where i can purchase a hand written one so she can have that ?

While she waits .

cheers]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=205&threadid=52911 2013-06-13T20:52:57 00 chunk522 22 Is it now needed to install smokes as standard to comply?

Thanks]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=205&threadid=52910 2013-06-13T19:44:56 00 burke3 34
This time I have a set of 2-off 32-amp IEC60309 sockets to be mounted adjacently on an enclosure. the circuits are 1PN+E. The sum of the loads across the pair of sockets will be less than 32A, and I would like to run a radial supply to the pair together from a 32A MCB on 4mm2 cable.
However, I have seen something on the internet that this idea of a radial supply to 60309 style sockets is only allowed for 16A models.

Would I be transgressing BS7671 if I were to implement this format of distribution.?

I cannot see why it would be unreasonable in this case where the protection rating is no more than any individual outlet.

Once again your comments would be most valued.


thank you,
Joey]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=205&threadid=52909 2013-06-13T18:25:01 00 thesaint 14 http://www.theiet.org/forums/forum/messageview.cfm?catid=205&threadid=52908 2013-06-13T17:26:53 00 beaver74 6 been to look at a metal cabin that need a bit of work.

the cabin is supplied by a 2.5mm swa. and is surrounded buy other cabins also supplied by TN_C_S.
there is no main bonding to cabin back to MET and the supply cable can not be used to calculate as it is not terminated with more than about 2 strands.
my options are

to drill down and hope to get a low enough impedance (but there is a potential risk of difference potentials between the T.T cabin and the surrounding TN_C_S supplied cabins.

or upgrade the submain to incorporate a bond back to the MET and make TN_C_S with the small risk of a lost neutral to users of the play ground

any thoughts]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=205&threadid=52894 2013-06-13T05:07:08 00 ssohnoherewego 8
My employer has scratted about for ages taking whatever work he could get, mainly domestic. He has now been asked to quote for an EICR on a commercial unit with a mixture of old and new installations. Fire alarms, emergency lights, high bay lights, steel trunking with conduit drops. Lids missing of trunking housing singles, old circuits that used to supply pieces of machinery etc, you get the picture.

He will be expecting me to conduct the EICR, but i have not done anything like this before, just domestic. I have expressed my concerns but it seems to fall on deaf ears. He makes out to me that he has loads of industry experience himself, but in the past when i have asked him things of which i am unsure of it becomes clear that he does not have a clue.

I appreciate being employed in these tough times but this is playing heavy on my mind.

Sorry for what seems like an essay, but any advice on what you would do in my situation, would be appreciated, from others who may have similar experiences]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=205&threadid=52889 2013-06-12T17:36:44 00 mrl200 13
It just doesn't seem right.

Just wondered what peoples thoughts were on this?]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=205&threadid=52888 2013-06-12T17:22:59 00 74jools 12 As an NICEIC DI, I complete EICR paperwork on NICEIC 'Green' Forms. Today I have carried out a very small commercial EICR (smaller than your average semi), but have no EICR's for commercial work. Don't really want to spend £20 on a pad of them and only use one!
Any suggestions?

PS. I have a pad full of commercial Periodic Inspection Reports with only one missing! lol

Julian]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=205&threadid=52887 2013-06-12T16:51:12 00 AJJewsbury 6
There seems to be a lot of choice out there, but little in the way of reviews, so any pointers would be appreciated. What to avoid would be just as useful as recommendations!

thanks
- Andy.]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=205&threadid=52884 2013-06-12T15:15:45 00 keithredpath 11
All I done was to do Earth Loop Impedance Tests inside the Comms Cabinets on the 13 amp socket outlets that were not in use.

I set my Megger 1553 to "No Trip" and recorded the tests results.

Is there a chance I created a problem by carrying out these tests?

I would like to know for certain as I frequently work in Comms Rooms and am always compromised by what I can and what I cannot test and feel this is the least I can do without causing a disturbance.]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=205&threadid=52874 2013-06-12T11:49:47 00 geov 15
We had to change the board (2 x 63 amp, 30ma rcds), but found two double socket outlets in the kitchen each with 4 x 2.5 t&e conductors and no mpb to the copper water incomer. We have not yet traced the additional t&e connections The customer is not keen to fund remedial work.

How would you code each of the above?

Regards.]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=205&threadid=52869 2013-06-12T11:08:46 00 davidwalker2 10 I need the benefit of your collected wisdom to provide an answer to a dilemma. My understanding is that if live terminals are in an enclosure, the enclosure must be sealed such that a tool is needed to open it. Usually this is a screwdriver or similar, but presumably a padlock opened by a key would count, the tool being the key. If that is so, what about a combination padlock? Would that meet the regulations?
David]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=205&threadid=52867 2013-06-12T10:09:09 00 skeltoa 3
There are also similar tables for the measured maximum earth fault loop impedances 2B,C,D in Appendix D of Guidance Note 3 (also in On-Site Guide) but these have values that are slightly less.

Why are there two sets of tables. Main issue is that if the circuit is designed to the first set of tables in all liklehood they shall actually fail on measured value as these are less.

]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=205&threadid=52866 2013-06-12T02:27:38 00 steviestrikes 14
http://ashleysgreenlife.blogsp...body-voltage-with.html

As you can see - it's safe for toddlers too!.

However, since the guidance in the link is a bit vague, GN3 should perhaps prescribe that the potential is measured between the earth of a socket outlet and within, say, 50mm of the person's navel (using a second "alligator" clip); and that any piercings be removed.

Any other improvements or thoughts in general?]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=205&threadid=52865 2013-06-11T21:36:21 00 goldenboy1818 19 http://www.theiet.org/forums/forum/messageview.cfm?catid=205&threadid=52864 2013-06-11T20:39:33 00 prophet 11
I plan on fitting conventional panel mount push buttons on a panel to operate contactors at some distance away.

I would imagine it would go something like this;
p/button>>tri-rated>>multiplex>>cat5/6>>multiplex>>tri-rated>>contactor]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=205&threadid=52863 2013-06-11T20:35:48 00 Smith249 8
Wet room, that is a tiled room without a tray, but with a fixed shower head and drain gully in the floor

Ceiling is 2m, well just under when tiles are on.

As I understand it from the 17th BS7671, there is no zone 2 now for wetrooms, there is a 1.20m arc from the fixed water outlet. Does this mean past 1.20m it is outside the zones? if so would you be happy fitting a IPX4 fan heater just past 1.20m, it would be right up high so wouldn't be readily available to touch. 701.512.2 does say IPX4 in zones 1, however the Dimplex IPX4 fan heater does not look sealed enough for zone 1 so have I missed something here?

Also, extraction fan, this will be going much nearer to the fixed water outlet than 1.20m. and due to the ceiling height not putting me outside the zones then it will either have to be a SELV unit or a duct fan, correct? Problem I have is the duct run is 5 meters. It is on the ground floor so locating a high flow duct fan would be difficult. Are there SELV centrifugal fans available that are SELV to cope with the longer duct runs?

All circuits will be 30mA protected.

Any advice would be much appreciated, never installed a wetroom so need a bit of clarification.

Kind Regards,
]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=205&threadid=52862 2013-06-11T17:49:18 00 stateit 3
Alleviated by no switch drops - Totally wireless, Rako system with switching from iPads.

2) Loft work in a C15th farmhouse. Initial depression at thought of decades old compressed fibreglass insulation and mummified rats.

Alleviated by it being insulated with 10" of freshly laid wool insulation . Nice.]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=205&threadid=52861 2013-06-11T14:12:28 00 Davey65 4 http://www.theiet.org/forums/forum/messageview.cfm?catid=205&threadid=52860 2013-06-11T11:49:01 00 hifly 1
thought it may be of use to some.

http://www.sse.co.uk/HelpAndAd...cies/EmergencyNumbers/]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=205&threadid=52852 2013-06-11T07:25:57 00 SherlockOhms 12
HMO property, 4 bed semi.

Heat alarm in kitchen (non battery backed)
Smoke alarm in hall way and first floor landing (both battery backed).
All three interconnected.

Should this arrangement be on a dedicated circuit or can it be taken from lighting?

S.]]>