Re-take - Useful Information for 2394 :

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Must thank my learned colleague tazz , guiding me on the right path . Part - 1 & Part - 6 , Thank mate

Using the building , for a dwelling , the design may result in either a system of smoke & heat alarms or a more complex system such as . a
BS-5839-1 Grade A which may be found in a large dwelling or a house in multiple occupation

The design of the system can ( Either ) meet the requirements of BS-5839-1 ; BS-5839-6 or for a new or materially altered dwelling . Approved Document B .

Smoke alarms own RCBOs
Re-wired a shop , with two flats above the shop premises . The flat(s) have each 1 Heat , 1 Ionisation , 1 Optical
5 detectors . Heat , Ionisation , Optical . large shop .

Fire & Safety Services . was working of ( BS-5839 part 6 )
Fire Inspector . was doing his rounds in the shop . happy about the (( Detectors to BS-5839-6 )) as he said this is the , Minimum protection ( LD3 )

Fire Inspector . ask for two remote sounder from the shop to the flats upstairs ( individual )

haven't done this before , the old brain was on overdrive here . Fire Inspector looked through the flats and said no fire doors , normal doors ,

BS-5839-6 recommends achieving a sound level of 75 dB(A) at the bedhead. It also recommends more than 85 dB(A) at the doorway of each bedroom where doors exceed 20 dB ..." unless there is a sounder in the bedroom ". As domestic smoke alarms usually generate 85 dB(A), neither of these levels can be achieved in most situations and a bedroom alarm or sounder is justified. Also, research has shown that young children can sleep through loud alarms while elderly people and others with hearing impairments may also not respond.

after a talk with him Fire Inspector . he gave me some options .
• Yes you can use 3 core & E . depends on the circumstance . Part - 6 .
from my point of view . I have used ( FP - 200 ) after leaving the shop , 50/60 metres . on the grounds off identification .

from the Shop : if this was 3 - core & E . after the flats have been Isolated , to the layman would he know that there is a live cable in the attic ??
That's why I used this system ( FP - 200 ) and not 3 - core & E . grounds of Safety .

Now am a bit wiser about 75 dB(A) at the bedhead . The doors , The doors .
Yes . fire Inspector said install the remote sounder in the hall next to the bedroom door . ( No fire door ) I have decided to install the remote sounder in the bedroom . end of .

PS , I never got any paperwork with this . I have asked the fire Inspector for information on this matter Part - 6 . remote sounder 2013

► (( In the drawing , am only making you aware of the ( dB ) the doors . the doors )) ◄ something to work off .

In my case Part - 6 : ( LD3 ) BS-EN-14604:2005 , Ei141RC Ionisation , Ei144RC Heat , Ei146RC Optical & Aico EI167RC Remote Sounder
Remote Sounder. Mains powered. Interconnects with 2100, 160RC and 140 series alarms

Fire Inspector , was happy about the safety aspect of Electrical Safety . He backed me up on this .

PS the landlord was doing handstands

 

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Which one of the following is not part of the requirements for fault protection : A) 411.3. 411.3.1. 411.3.1.1.

- Protective earthing .
- Protective equipotential bonding
- Automatic disconnection
- Protection by insulation of live parts

Protection against electric shock : Chapter 41.
410.3.3. The following protective measures generally are permitted :

(i) Automatic disconnection of supply ( Section 411 )
Note : In electrical installations the most commonly used protective measure is automatic disconnection of supply .

Section 411: Protective Measure : automatic disconnection of supply

 

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Extracts : 2008:

Certificate of Design , Installation and Commissioning of a Fire Detection and Alarm system of Grade B , C , D , E , F in a dwelling

□ Details of the Client .
This section of the certificate needs no explanation require only that the client be indentified .

□ Details of the fire detection and alarm system .
This requires the address at which the system is installed to be stated . together with extent of the installed system and the identification of the status of the system in terms of " New or a Modification "

Commissioning
Additionally , the model and serial number of an instrument used for testing the ( sound level ) must be recorded in the space provided . An instrument complying with BS-EN-61672 , class 2 , with a slow response and " A " weighting is suitable for measuring the sound level .

it should be noted , however , that sound pressure tests may be unnecessary . The requirements of 85 dB(A) at the bedroom door , with the door open , will be deemed to have been met if a smoke alarm complying with BS-5466 is located within 3 m of the doorway .

In order to get accurate and repeatable measurements, it is essential that a sound level meter meets the relevant standards. Most measurement regulations will state the standards that should be met by the equipment.

Sound Level Meter Standards
To satisfy most regulations, new meters should meet the standard IEC 61672 (or the British Standard equivalent BS-EN-61672) to either Class 1 or Class 2. There are other standards for the Calibrator, for noise dose meters, personal sound exposure meters, octave band filters and so on. Here is a summary of the most important standards.

Standard : IEC 61672
Relates To : Sound Level Meters
Electro acoustics - Sound level meters
This is the most recent sound level meter standard and the one that modern measurement regulations will require.
Grades in order of accuracy: Class 1, Class 2

Standard : IEC 60651
Relates To : Sound Level Meters
Specification for Sound Level Meters
This standard has been superseded by IEC 61672. Older meters meeting this standard can still be used for many applications. Originally this standard was called IEC 651, but was renamed IEC 60651.
Grades in order of accuracy: Type 1, Type 2

Standard : IEC 60804
Relates To : Sound Level Meters
Integrating-Averaging Sound Level Meters
This standard has been superseded by IEC 61672. It was originally called IEC 804 but was renamed IEC 60804. It extends IEC 60651 and describes the performance of Integrating sound level meters.

 

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2013 / 14
BS-5839 Parts 6 .

Detection & Alarm Systems .

Power supplies
1 ) The power supply for fire alarm system should be taken from the dwelling's mains electricity supply . The mains supply to the smoke alarm(s) should comprise :

a) a single independent circuit at the dwelling's main distribution board ( consumer unit ) :
or
b) a single regularly used local lighting circuit . ( This has the advantage that loss of supply will be rectified to restore the lighting )

Most installations in dwellings , carried out in accordance with the 17th Edition of the IET Wiring Regulations , will have a 30mA RCD ( residual current device ) or RCBO ( residual breaker with overcurrent protection ) protecting all circuits . in this circumstance it is arguably preferable for the supply for the fire alarm systems to be taken from a regularly used lighting circuit as operation of the RCD or RCBO will soon be known , ( for other than Grade d systems , BS-5839-6 recommends avoiding the use of RCDs on fire system circuits . This will usually require clipping cables direct to the surface or enclosing in steel conduit or the like )

The Approved Document requires a means of isolation for the smoke alarms so that they can be isolated with the dwellings lights on . This does not usually necessitate separate isolation facilities as most smoke alarms can be removed from their mounting plate ; this satisfies the recommendation for means for isolation .

 

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Smoke alarms for landlords & agents

The Building Regulations (1991) state that all properties built since June 1992 must be fitted with mains operated interlinked smoke detectors/alarms with at least one detector per floor level. .. ( Regarding rented properties of any age )

2013 : Scope of Part P ( BR )

Part P applies to electrical installations in buildings or parts of buildings comprising :
i) dwelling houses and flats;
ii) dwelling and business premises that have a common metered supply - for example shops and public houses with a flat above with a common meter ;

 

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Carbon monoxide fire detectors ( Clauses 10.1.4 & 10.2 )

Carbon monoxide fire detectors can be immune to certain environmental influences that can cause false alarms in other detectors such as dust , steam and cigarette smoke , whilst responding to most types of fire appreciably faster than most heat detectors .

Note : The 2013 version of BS-5839-6 advises :
e) Carbon monoxide fire detectors , or multi-sensor detectors incorporating a carbon monoxide sensor , should not be used within dwellings , unless :

i) the detectors are incorporated within a Grade A , B or C, system and there is a high likelihood that the system will be subject to periodic maintenance by a competent person at periods not exceeding 12 months ; or

ii) a fault warning is given to indicate the need to replace the electrochemical cell of the detector before it reaches the end of its anticipated life .

f) Subject to compliance with 10.2e ) above , carbon monoxide fire detectors may be installed within the circulation areas of a dwelling in conjunction with an equal number of optical smoke detectors .

g) Subject to compliance with 10.2e ) carbon monoxide fire detectors may be installed in any rooms within a dwelling , other than kitchens .

Note 5 : if , in any room of dwelling , a heat detector could provide adequate fire protection , a carbon monoxide detector may be used instead .

 

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2013 .

Fire safety enforcing authority : The body responsible for enforcing the Fire Safety Order 2005 This is usually the fire & rescue authority .
Fire Safety Order : The Regulatory Reform ( Fire Safety ) order 2005 ( SI 2005 / 1541 , The Stationery Office Ltd )
Local authority : The local authority empowered to carry out the building control function and to enforce Building Regulations in their area by virtue of section 91(2) of the Building Act 1984 .

 

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( BR ) 2013

Domestic installations

are within the compass of the Electricity at Work Regulations when persons are at work , i.e. employed to work in the premises , otherwise they are not . However , the same basic principles apply as are appropriate to places of work , in the maintenance of domestic installations would comprise .

a ) routine checks .
b) periodic inspection and , as necessary , testing .

in a user manual , a householder must be advised that as well as a professional periodic inspection and test at least every ten years , all defects must be repaired as they arise . if there are signs of wear , overheating , looseness , or difficulty in operating equipment then an electrician should be instructed to inspect the installation and maintain as necessary .

 

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2013 : Fire detection & Alarm systems

Inspection , testing & certification
Inspection & testing

The fire alarm electrical installation must comply with Part P of the Building Regulations .
Test results may be included in the electrical installation certificate ( and schedules ) if carried out as part of the electrical installation ; otherwise a minor electrical installation certificate shall be completed ( for grade D systems ) In all cases after successful testing and commissioning , a fire system certificate for design , installation and commissioning must be completed and given to the person ordering the work .

2013 : ( BR ) Installation and commissioning certificate ( Grade D system )
The fire alarm installation is to be designed , installed and tested in accordance with BS-5839-6

Testing
The wiring of one fire alarm installation may be included in the Electrical Installation Certificate ( and schedules ) if carried out as part of the electrical installation ; otherwise a minor Electrical Installation Certificate shall be completed ( for Grade D systems ) In all cases after successful testing and commissioning , a fire system certificate for design , installation and commissioning must be completed and given to the person ordering the work .

Fire detection & Alarm systems
( BR )

Handover
Inspection , test and commissioning certificates ( and schedules ) manufacturer's instructions and necessary guidance are handed over to the person ordering the work .

 

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( BR ) 2013

PME - supply ( TN-C-S system )
Based on 25mm[SUP]2[/SUP] tails and selection from Table 54.7. of BS-7671:

Notes :
1) An isolator is not always installed by the electricity distributor .. ( DNO )
2) Distribution will quote a ( Ze - 0.35Ω ) and a fault level of 16kA . A loop impedance of 0.35Ω equates to a fault level of , 230V ÷ 0.35Ω = 657A . 16kA is the worst-case short-circuit fault level and 0.35Ω the worst-case external earth-loop-impedance .

 

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Kitchen is no longer identified in the Approved Document as being a special location .

( BR ) 2013
Location of accessories in kitchens .
General guidance can be provided as follows

i . Wiring accessories ( e.g. socket-outlets , switches ) should preferably be mounted on the building fabric and not on kitchen furniture .

Accessories and electrical equipment such as socket-outlets and under-cupboard lighting can be fixed to fitted kitchen units provided that they are securely fixed to rigid parts of the units that are not demountable or otherwise liable to be disturbed in normal service . Account should be made regarding accessibility for inspection , testing and maintenance , and provision of adequate protection against damage ( by impact or water for example )
for the accessories , equipment and associated wiring .

ii . Cooker control switches , extractor fan switches , etc should not be mounted so that it is necessary to lean or reach over gas or electric hobs for their operation .

iii . Socket-outlets should be installed a minimum of 450mm from the floor .

iv . Accessories should be installed a minimum of 300mm from the edge of kitchen sinks and draining boards to reduce the risk of being splashed .

v . Socket-outlets supplying washing machines and dishwashers , etc should be positioned so that water that may drip from plumbing or the equipment is unlikely to affect the socket-outlet or plug .

vi . To prevent damage to the plug and flexible cable on insertion and without the centre of a socket-outlet should be a minimum of 150mm above the work surface .

vii . Socket-outlets supplying appliances pushed under a work surface , e.g. dishwashers , tumble dryers and fridges , should be accessible when the appliance is pulled out .

viii . Appliances built into kitchen furniture ( integrated appliances ) should be connected to a socket-outlet or fused connection unit that is readily accessible when the appliance is in place and in normal use , or be supplied from a socket-outlet or other connecting device controlled by a readily accessible double-pole switch or switched fused connection unit .

ix . Light switches should be readily accessible .
x . Cooker hoods should be 650 to 700mm above the hob surface , subject to ( xi )
xi . Manufacturer's instructions should be followed .

 

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( BR ) 2013

Extractor fans :
A suitable 230V extractor fan may be installed in zones 1 & 2 , and outside the zones . if an extractor fan is installed in zone 1 or 2 it must be protected against the ingress of moisture to at least IPX4 .

An extractor fan supplied from a lighting circuit for a bathroom without a window should have its own means of isolation . as otherwise replacement or maintenance of the fan would have to be carried out in the dark , An isolation switch for a fan with an overrun facility will need to be triple-pole ( switch-wire , Line and neutral ) and must be installed outside zones 0 , 1 , and 2 .

 

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( BR ) 2013.
Switch wires in a new installation or an addition or alteration to an existing installation

Where a two-core cable with cores coloured brown and blue is used as switch-wires , both conductors being line-conductors , the blue-conductor must be marked brown or L at its terminations .

Intermediate and two-way switch wires in a new installation or an addition or alteration to an existing installation

Where a three-core cable with cores coloured brown , black and gray is used as switch-wires , all three-conductors being line-conductors , the black and gray-conductors must be marked brown or L at the terminations .

 

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Cooker circuits in household or similar premises . ( BR 2013 )

Circuit specifications

A cooker circuit with cables in walls or partitions installed in earthed steel conduit or with an earthed metallic sheath does not require RCD protection unless the cooker control unit incorporates socket-outlet

The circuit should supply a control switch complying with BS-3676 or a cooker control unit complying with BS-41177.

The rating of the circuit is determined by the assessment of the current demand of the cooking appliance(s) and cooker control unit socket-outlet if any.
A 30 or 32A circuit is usually appropriate for household or similar cookers of rating up to 15kW.

A circuit of rating exceeding ( 15A ) but not exceeding ( 50A ) may supply two or more cooking appliances where these are installed in one room . it is recommended that a control switch or cooker control unit should be installed and placed within two metres of the appliance , but not directly above it . Where two stationary cooking appliances are installed in one room , one switch may be used to control both appliances provided that neither appliance is more than two metres from the switch .

it is recommended that electric ovens are supplied by a separate circuit ; however , for lightly loaded circuits , ovens of rating ( 13A ) or less may be connected into a ring final circuit .

Precautions need to be taken to prevent the heat generated by a cooker , including the hob , creating a risk of fire , or of harmful thermal effects , to adjacent equipment or materials including furnishings , e.g. curtains .

 

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Reg / P 278

BS-4177:1992 , Specification for Cooker vcontrol units . Table 53.4.

A cooker switch complying with BS-3676 or a cooker control unit complying with BS-4177 ( a cooker switch incorporating a socket-outlet ) is usually installed where a cooking appliance is to be connected other than by means of a plug and socket-outlet.

BS-3676 :
Switches for household and similar fixed electrcal installations .
Specification for general requirements . Now replaced by BS-EN-60669-1 , 2000 , but remains current , 2000 is dual nimbered BS-3676:2000

 

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Traditional Junction boxes .. ( Acceptable for locations which are accessible )

As standard ( junction boxes ) have no cable clamps this means the box must be screwed-down and the cables fixed to prevent strain on the connections.
- cables fixed to prevent strain .. ( Cable Clips )

 

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Wago - 2014:

Thank you for contacting us with your enquiry.

The most recent requirements of BS5733 for a maintenance free accessory extend to the terminals, the enclosure and most importantly the performance of the enclosure with the terminals. The Wago 773 and 222 range of connectors have undergone the testing required for the standard along with the ipcc-1 Wagobox enclosure. The junction box and terminals when used together and installed following the MF instructions meet the BS5733 MF requirement. The ( MF ) mark is therefore placed on the junction box not on the terminals. The MF BS 5733 markings are all on the underside of the lid and also include information about the parameters for the cable clamp strain relief in the enclosure, current ratings for the connectors and maximum aggregate current information for the accessory in a MF situation. This information is also provided in our instruction leaflet. Further information is available on the support page of our website.

At the time of our MF testing we undertook even more vigorous testing on areas such as vibration to future proof the junction box system in the event of any changes to the requirements. At this time we are not aware of anything in the new third amendment due next year which should affect your ability to use the Wagobox in its present form for MF applications.

 

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( BR ) 2013:

Outcome (Observation & Recommendations)

The condition Report form in BS-7671: includes notes for guidance. Within Section ( K )
Observations . each observation is required to be allocated a classification code as follows :

C1 - danger present – Risk of injury . Immediate remedial action required .
C2 - Potentially dangerous – urgent remedial action required .
C3 - Improvement recommended .

The electrician carrying out the inspection & test is required to provide an overall assessment as to whether the installation is satisfactory or unsatisfactory .

C1 . Immediate remedial action required
• Broken equipment where live-parts are exposed
• Conductive parts live ( the result of a fault )
• Incorrect polarity

C2 . Potentially dangerous – urgent remedial action required
• No means of earthing at origin
• RCD installed for fault protection (e.g. in a TT installation) that does not operate when test button is pressed
• No circuit protective conductor in one or more lighting circuits with Class 1 light-fitting ( Class 1 light-fitting must be earthed )
• A borrowed neutral ( two-circuits using the same neutral )
• A socket-outlet with no earth-connection

C3 - Improvement recommended
• No 30mA RCD protection to socket-circuit
• No supplementary bonding in bathroom where it is required .
• No circuit-protective conductor in one or more lighting circuit with Class II light-fitting ( Class II light-fittings do not require to be earthed but may be changed to Class 1 )
• Use of water-pipe as a means of earthing

 

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( BR ) 2013

A ring or radial socket-outlet final circuit , with spurs and permanently connected equipment , if any , may supply an unlimited number of socket-outlets and fused connection units

Socket-outlets for washing machines , tumble dryers and dishwashers should be located so as to provide reasonable sharing of the load in each leg of the ring .

Where two or more ring final circuits are installed , the socket-outlets and permanently connected equipment to be served are to be reasonably distributed among the circuits .

Spurs
A non-fused spur is wired in the same size ( cross-sectional area ) cable as the ring final circuit . A fused spur is connected to the circuit through a fused connection unit , the rating of the fuse in the unit not exceeding that of the cable forming the spur and , in any event , not exceeding 13A

Supplementary bonding in kitchens
There is no specific requirement in BS-7671 to provide ( Supplementary bonding in kitchens ) Water pipes , metal sinks or draining boards and metal furniture do not require ( Supplementary bonding )

- ( ESC )
Kitchen Safety , If appliances such as fridges, dishwashers and washing machines are fitted under worktops, getting to sockets may be difficult. Ideally, these appliances should be controlled by a switched fuse-connection unit mounted above the worktop where you can reach it easily.

- BS-7671:2011: Appendix 15 .
Fused connection unit ( FCU ) to BS-1363-4 … maximum fuse 13A

Junction box to BS-EN-60670-22
Junction boxes with screw terminals must be accessible for inspection , testing & maintenance or alternatively , use maintenance-free terminals / connections ( Regulation 526.3. )

R/P 285 : BS-EN-60670-22: 2006
Particular requirements for connecting boxes and enclosures .. 521.8.3. Appx 15 Fig 15A

Installations designed from 1st July 2008 must comply with this new set of Regulations.
There are regulations concerning the connection of conductors relating to lighting and power final circuits

This is further reinforced in Appendix 15 of the Wiring Regulations which states “ Junction boxes with screw terminals must be accessible for inspection, testing & maintenance or, alternatively, use maintenance-free terminals / connection (Regulation 526.3)

“ Junction boxes with screw terminals must be accessible for inspection ... ”
( Providing the enclosure is fixed and accessible traditional junction boxes are acceptable )

“ Maintenance free terminals provide a solution where accessibility is an issue ”

• Ancient colours
Installations with plain green sleeving on the earth wires will typically be approaching 40 years old and are likely to require replacement.

R/P 115 . 2011:
514.4.5. The single colour green shall not be used .

Identification of protective conductors
The first sentence of Regulation 514.4.2 is conclusive and leaves no room for doubt. It reads, ‘ The bi-colour combination green-and-yellow shall be used exclusively for identification of a protective conductor and this combination shall not be used for any other purpose ’.

 

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Split-load . ( CCU ) Etc. .

Schedule of Test Results

RCD 1
Light up . .. BS-EN-60898-1
Sockets down .. BS-EN-60898-1
Cooker .. BS-EN-60898-1

RCD 2
Light down .. BS-EN-60898-1
Sockets up .. BS-EN-60898-1
Shower .. BS-EN-60898-1

Generic Schedule of Test Results
Circuit number , for three-phase installations it is preferred to use the designation ( L1 . L2 , L3 ) so for example , for the 5[SUP]th[/SUP] circuit , the designation ( 5L1 , 5L2 , 5L3 )