Re-take - Useful Information for 2394 :

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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 )

 

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( BR )
Before the supply is connected .
Polarity ( by continuity methods )

With the supply connected and energized
Re-check of polarity , using an approved voltage indicator

 

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Continuity of ring final circuit conductors .
Three step test is required to verify the continuity of the Line , Neutral , & Protective-conductors

Step 1 .
The line , neutral and protective-conductors are identified at the distribution board or consumer unit and the end-to-end résistance of each is measured separately .

A finite reading confirms that there is no open circuit on the ring conductors under test .
The résistance values obtained should be the same ( within 0.05Ω ) Note → if the conductors are all of the same size .

If the protective conductor has a reduced csa the résistance ( r2 ) of the protective conductor loop will be proportionally higher than that of the line and neutral loops e.g. 1.67 time for 2.5 / 1.5mm2 cable . ( 2.5 ÷ 1.5 = 1.67 )

 

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(Dry meter) to (Card Meter)

This is another job, from the Fire & Safety Department & Local Council .. systems use at time ( LD3 )

(Watch Manager) 4/7/2014 .
Fire & Rescue Service . Fire Safety Department .

Day and time of a private landlord . Does greed come into play here ?
( Shop work ) with two individual flats above shop .

Landlord changed a , Dry meter to card-operated meter , just to make more money from the tenant ….. ( That’s when it when Pear Shape )

Fire Safety Officer , did a Safety check and found this problem . The card ran out , with no power in the Building . ( LD3 ) Alarms running of Battery only . no mains to Building . 14 hours on Battery only . The owner of the shop had complained to the land lord about loss of power to shop premises .

On one occasion the landlord when away for the weekend Fri / Monday . Emergency credit was only one pound .

Taken from Extracts from letter :
Electricians a better understanding . from your point of view

□ The electrical power supply that is feeding the fire alarm system in all the above premises is by a ( Card Meter ) and that a recent electrical power failure in the shop/s resulted in the alarm being powered by the ( battery alone for an unspecified time ) This is insufficient and is totally unacceptable to have the fire alarm on a card-operated meter or similar set up .

BS-5839 part 6 grades fire detection and alarm systems for premises according to the (Complexity of the system) for the purpose of specifying fire detection and alarm systems and the associated engineering design parameters there are ( Six Grades) ◄◄

Grades A to D are the most relevant to yourself and are all described below with regards there power supplies .

Please find below the excerpts for the relevant power supplies to BS-5839 part 6 fire alarm system. Depending on size layout , fire separation and number of rooms etc. , dictates what grade and level of fire alarm is acceptable for that premises .

15.2 : Recommendation’s for power supplies for Grade A system . ←
The following recommendations are applicable .
a) Power supplies for a Grade A systems should comply with the recommendations of Clause 25 of BS-5839-1:2002 . with the exception of 25.4e )

b) The circuit serving the fire detection and fire alarm system should be such that it is not isolated within the dwelling, except in event of deliberate isolation of the supply by the occupier ( e.g. by use of an isolating device complying with the recommendations of 25.2a ) of BS-5839-1:2002. Or in the event of fault conditions . I is not. For example , [[ It is not . acceptable for the main supply to be connected via a card-operated meter or similar ]]

c) The standby supply should be capable of automatically maintaining the system in normal operation ( whilst giving an audible and visual indication of mains failure ) for a period of 72h , after which sufficient capacity should remain to supply the maximum alarm load ( see 3.22 ) for at least 15 mim . However , if a dwelling is never left unattended ( e.g. a mansion in which staff are always present and can arrange for rectification of a supply failure ) the period of normal operation sustained by the standby supply may be reduced from 72 h to 24h .

Note 1 : it is not recommended that the standby period be reduced in dwellings on the grounds that an automatically started emergency generator is present .
Note 2 : T provide a battery that will operate a Grade A system for 72h in the event of mains failure will normally necessitate relatively larger batteries , which might need to be housed in a separate supply unit . Any external cabling between the power supply unit and the CIE needs to be duplicated for compliance with BS-5839-1 and needs to be fire-resisting .

15.3: Recommendation’s for power supplies for Grade B system . ←
The following recommendations are applicable .
a) The normal supply for a Grade B system should be derived from the public electricity supply , transformed or modified as necessary . The mains power should be supplied from an independent circuit at the dwelling’s main distribution board . No other electrical equipment should be connected to this circuit .

b) The mains supply to the fire detection and fire alarm system should be supplied, via an isolating protective device ( such as a circuit-breaker ) form the load ( dead ) side of the main isolating device for dwelling . The isolating protective device should be labelled “ Fire Alarm : Do Not Isolate “

c) The circuit serving the fire detection and fire alarm system should be such that it is not isolated within the dwelling , except in the case of deliberate isolation of the supply by the occupier ( e.g. by use of an isolating device complying with the recommendations of 25.2a ) of BS-5839-1:2002. Or in the event of fault conditions , it is not , for example , [[ It is not . acceptable for the main supply to be connected via a card-operated meter or similar ]]

d) The circuit serving the fire detection and fire alarm system should preferably not be protected by any residual current device ( RCD ) if RCD protection is required for reasons of electrical safety ( e.g. in an installation forming part of a TT system ) either of the following conditions should be satisfied :

i) The RCD . should serve only the circuit supplying the fire detection and fire alarm system.
ii) The RCD protection of the fire detection and fire alarm system circuit should operate independently of any RCD protection for circuit supplying socket-outlets or portable equipment .

Note : for example , 15.3d ii ) would be satisfied if , say , a time delayed 100mA RCD . served the entire electrical installation in 15.5 Recommendation’s for power supplies for Grade D system . ←

e) The mains supply should be backed up by a standby supply , comprising a secondary battery with an automatic charger , that is capable of automatically maintaining the system in normal operation ( whilst giving an audible and visual indication of mains failure ) for a period of 72h , after which sufficient .

capacity should remain to support the maximum alarm load ( see 3.22 ) for 15 min .

f) The normal and standby supplies should each be capable of supplying the maximum alarm load irrespective of the condition of the other supply .

g) Batteries used in Grade B systems should be of a type that have an expected life of at least four-years under the conditions of use likely to be experienced in the system . Automotive lead-acid batteries ( i.e. the type normally used for starting service in cars ) are not suitable for fire alarm services and should not be used .

h) The battery charger for the standby supply should be compatible with the batteries used . and should be capable of re-charging a battery from its final voltage ( see 3.10 ) to a capacity sufficient to comply with the recommendations of 15.2e ) within a charging period of 24h

 

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15.4 Recommendation’s for power supplies for Grade C system . ←
The following recommendations are applicable .

Power supplies for Grade C systems should comply with the recommendations of 15.3. except that : , [[ It is not . acceptable for the main supply to be connected via a card-operated meter or similar ]]

a) the working of the label described in 15.3b ) may be amended to indicate the nature of any other system with which the fire detection and fire alarm system is integrated ( e.g. to read “ Fire / Intruder Alarm : Do Not Isolate “

b) The standby supply should be capable of automatically maintaining the system in normal operation for a period of 72h ( whilst giving the fault warning recommended in 17.4 ) after which sufficient capacity should remain to support the maximum alarm load ( see 3.22 ) for four minutes or to maintain fault warnings of the form and duration recommended in 17.4. whichever load is the greater .

Not : for intruder alarm systems , BS-EN-50131-1:1997 recommends a standby capacity of less than 72 h .Modifications to an intruder alarm systems are . therefore , likely to be necessary it is to incorporate a fire detection and alarm facility complying with the recommendations of this standard for a Grade C system . if a system is incapable of complying with the recommendations of this clause . it might be appropriate to regard it as a Grade E system , or to consider the possibility of a variation ( see 3.35 ) in respect of standby power supply duration , subject to agreement of the relevant interested parties ( e.g. the authority responsible for enforcing any relevant fire safety legislation ) for example , a variation might be considered in the case of an intruder alarm system with a facility for transmission of a mains failure condition to an alarm receiving centre .

15.5. Recommendation’s for power supplies for Grade D system . ←
The following recommendations are applicable .

a) The normal supply for smoke alarms and any heat alarms in Grade D system should be derived from the public electricity supply to the dwelling . The mains supply to the some alarms and heat alarms should take the form of either :

i) an independent circuit at the dwelling’s main distribution board , in which case no other electrical equipment should be connected to this circuit ( other than dedicated monitoring device installed to indicate failure of the mains supply to the smoke alarms and any heat alarms ) ; or

ii) a separately electrically protected . regularly used local lighting circuit .

b) if smoke alarms and any heat alarms are of a type that can be interconnected by wiring , all smoke alarms and heat alarms should be connected on a single final circuit .

Note : This recommendation does not apply if the form of interconnection is not capable of conducting current e.g. if the means of interconnection comprises radio communication rather than wiring .

c) The capacity of the standby supply should be sufficient to power the smoke alarm(s) and any heat alarms in the quiescent mode for at least 72h , whilst giving an audible or visual warning of power supply failure after which there should remain sufficient capacity to provide a fire warning for a further four minutes , in the absence of a fire , a fault warning for at least 24h .

Plus : Remote sounder have to be added to upstairs flats. 85 dB

 

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15.5. Recommendation’s for power supplies for Grade D system . ←
c) The standby supply for smoke alarms and heat alarms may take the form of a primary battery , a secondary battery or a capacitor