***Cont../ Useful Information for Electricians & Apprentices***

[amberleaf]

O.S.G.. The use of other methods’ of determining Maximum Demand is Not Precludedwhere Specified by the Installation Designer

FirstlyI make no Apologies for the Way am Writing on any Matters . it can be a first day Apprentice or some one Needing aJog of Memory .
Sowe are all in the Same Boat . “ To Learn “

For the Apprentices . The Day we stop learning is the Day we hang Upour Tool-Bag

CookerDesign Current Calculations

Thefirst thing you have to do is get Your Head around the Calculations !!

(From a Design point of View ) 2392-10

DomesticInstallation Oven(s) & Hob(s) are to be Calculated upon their MAXIMUM LOADING
Startwith a simple Calculation ( An Oven has a rating of 2kW ) 2000

(I = P/V ) Formula … I = 2000 ÷ 230V = 8.70A …. Weare Using the Unit Amps


2392-10/ Domestic Installation Oven(s)

Ovenhas 4 Rings ( 2 x 1kW ) & ( 2 x 1.5kW ) & Grill ( 2kW ) & Oven (3kW )

-Controlled via a CookerSwitch with a Socket outlet .

Asa Designer . we’ll have to Apply Diversity ??

Important )- Diversity allowance to be Applied to the FULL LOAD CURRENT for CookingAppliances .

TheO.S.G. is telling us . Purpose of the Final Circuit fed from theConductors )
O.S.G.Table 1B p/97 – column (3) Cooking Appliances → At the Top of the Page Note : Type ofPremises ( 2392-10 → Household Installations ) Domestic Installation(s)

DomesticInstallation(s) Only O.S.G. - 10A + 30% f.l – Full Load ) of connected Cooking Appliances in the Excess of 10A+ 5A if a socket-outlet is incorporated in the Control Unit . ( C.C.U. ) – 45A + 13A Socket Switched with Neon .

Fromyour point of View ( The First 10A ofthe rated current plus 30% of the reminder ( Plus) 5A if the Control Unit incorporates s Socket.

Calculations)- You bank “ Hold OFF“ the first 10 Amps of the Maximum Load Current )
The10A will be used at the End of the Calculations’

-So your Work out the Total Power Rating & then calculate the Full Load Current

Calculations)- Power = ( 2 x 1 ) + ( 2 x 1.5 ) + ( 2+ 3 ) = 10kW

I= 10000 ÷ 230V = 43.48A … round it up to the first four numbers43.47826087 ( 48 ) 43.48A

UsingDiversity allowance stated ↑↑ ( 43.48A sub 10A = 33.48A )

I= 33.48 x 30 ÷ 100 = 10.04A

Youradding the ( 5A ) for Socket outlet . I = 10A + 10.04 + 5A = 25.04A )- Asa Designer this is your Expected Current Demand .

Remember )- Supply Cables Rated to suit DesignCurrent ( Iz )

 

[amberleaf]

“ Certification& Reporting “ resents3:

Listfour characteristics of the Electrical Supply that should be recorded on theDocument - this could come Up on-&-s .

313 – Supplies .

313.1. General The followingcharacteristics of the supply or supplies . from whatever source . & thenormal range of those characteristics where appropriate . shall be determinedby Calculation . Measurement . Enquiry or Inspection .

i) The nominal voltage(s) & its characteristics includingharmonic distortion .
ii) The nature of the current & frequency .
iii) The prospective short-circuit current at the Origin of the installation. ◄
iv) The Earth Fault Loop Impedance of that part of the systemexternal to the installation ( Ze )
v) The suitability for the requirements of the installation .including the Maximum Demand .
vi) The type & rating of the overcurrent protective device(s)acting at the Origin of the installation . ◄

These characteristics shall be ascertained for an External Supply& shall be determined for a private source . These requirements are equallyapplicable to main supplies & to safety services & standby supplies . ◄

NOTE : The above information should be provided by distributors’on request ( see Appendix 2 sec 2 )

Appendix 2 – Informative ) Some things have been Changed . inWording .

Definitions’ - p/39 . ( Ze )
That part of the Earth Fault Loop Impedance which is External tothe Installation ( Ω ) 313.1.

 

[amberleaf]

Fundamental requirement to understandthe basic principles . Measured / Calculated results and what affect they haveon a circuit . :rofl:

Conductor Résistance .

Whywe divided the Length ( x . mΩ/m figuresby ( 1000 )

Wedivided the length ( x . mΩ/m figures by ( 1000 ) to obtain a résistance value in Ohms .

O.S.G.– 9A )- milli-ohms per meter values . Weneed to covert them to Ohms for our Calculations’ ( dividing by 1000 does this )

 

[amberleaf]

Chapter 61 :

Initial Verification – Inspection 611 & Testing 612

Initial Verification [ Inspection & Testing ] Therefore helpsto ensure that Electrical Installations are Safe before being put into Service.

611 )- Inspection .

611.1. – Inspectionshall precede Testing & shall normally edone with that part of the installation under Inspection disconnected from theSupply . ◄◄

 

[amberleaf]

Therequirements of BS-7671:

BS-7671requires that every installation shall be Inspected& Tested to verify that the Regulation(s) havebeen met before [ Being put into Service ]

On completion of an installation or an addition or alteration toan installation . appropriate Inspection & Testing shall be carried out toverify so far as is reasonably practicable that the requirements of thisstandard have been Met .

133.2.1. Voltage :
Electrical equipment shall be suitable with respect to the maximumsteady-state voltage ( r/ms value for a.c. ) likely to be applied . as well as overvoltage’slikely to occur .

Note : for certain equipment . it may also be necessary to takeaccount of the lowest voltage likely to occur .

610.1. Every installation shall . during erection & oncompletion before being put into service . be inspected 7 tested to verify . sofar as is reasonably practicable . that the requirements of the regulation(s)have been Met .

Precautions’ shall be taken to avoid danger to persons &livestock . & to avoid damage to property & installed equipment . duringInspection & Testing .

612 )- Testing . InitialVerification .
612.1. General .
The tests of regulation 612.2. to 13 . Where relevant . shall becarried out the results compared with relevant criteria .

The Test of Regulation(s) 612.2.1. to 612.6. where relevant shall be carried out in thatorder before the installation is Energised .

If any Test indicate a failure to comply . That Test & any precedingTest . the results of which may have been influenced by the fault indicated .shall be repeated after the fault has been rectified

Three Important Tests .

612.2. – Continuity of Conductors .
612.2.1. - Continuity of Protective Conductors including main& supplementary equipotential bonding .

A continuity test shall bemade . it is recommended that the test be carried out with a supply having a (No-load ) voltage between 4V & 24V .ETC.

612.2.2. Continuity of the Ring Final Circuit Conductors .

Your Earthing is your First Line of Defence . ◄◄ :19:

 

[amberleaf]

( T ) 134.2. InitialVerification . -&-s :19:

134.2.1. During erection& on completion of an installation or an addition or alteration to aninstallation .
& before it is put into service . appropriate inspection &Testing shall be carried out bycompetent persons to verify that the requirements of this Standard have be Met.

 

[amberleaf]

612.13.1.

The Effectiveness of RCDs test facility will be Verified .

 

[amberleaf]

Exclusions from Scope . 702.11.

Except for Areas designed especially for Swimming Pools . The requirementsof Section 702 . Do Not Apply to .

Natural waters . Lakes or Coastal Beaches .

 

[amberleaf]

(T) 711.6. Inspection& Testing .

All TemporaryElectrical Installation(s) ofExhibitions .
Shows& Stands are required to be Inspection& Tested in line with Chapter 61 after EACHASSEMBLY on SITE.

First Amendedment . No change . 711.6.

 

[amberleaf]

What is the Maximum value of Insulation résistanceof a 230V lighting circuit .

( 1MΩ ) - 612.3.2. – Table 61. 500V / d.c. . -&-s . 2392-10 :19:

612.3.2.
The insulation résistance measured with the test voltage(s) indicatedin Table 61 . shall be conceded satisfactory if the main switchboard and eachdistribution circuit tested separately . with all its final circuit(s)connected but with current-using equipment disconnected . has an insulation résistancenot less than appropriate value given in Table 61.

Note 2 . Insulation résistance values are usually much higher thanthose of Table 61.


Whichof the following is Verified by the Polarity Test . -&-s . 2392-10

A) That there is a separation of live partsfrom other circuit(s) & from earth .
B) The Phase sequence of multi-phasecircuits is maintained throughout the installation .
C) Every fuse &single-pole control & protective device is connected to the line conductoronly . 612.6. & 612.1. :19:
D) All assemblies are properly mounted .adjusted . & installed correctly as required by the reverent regulation(s) .

 

[amberleaf]

Which IET Guidance Note . describes methods of Testing ElectricalInstallation(s) ◄► -&-s

IET Guidance Note 1
IET Guidance Note 2
IET Guidance Note 3 ◄◄ :19:
IET Guidance Note 4

 

[amberleaf]

Taken for old Notes .

Calculationwhen the protective device is an RCD orRCBO . :rofl:

ResidualCurrent Devices ( RCDs )

Wherethe installation is part of a TN-system . the basic requirement is given in Regulation 411.4.5. i.e..

Zs x Ia ≤ Uo volts.

Foran RCD ( Ia ) is the rated residual operatingcurrent providing disconnection in the required time .

ForTT systems the additional requirement that ( Ra x I∆n ≤ 50V )is given in regulation 411.5.3. In this requirement ( Ra ) is the sum of the earth electrode résistanceof the protective conductor connecting it to the Exposed Conductive Parts .

Inthe above expression . of course . ( I∆n ) is in amperes . limitingconsideration to residual current circuit breakers ( RCBOs ) to BS-EN 61008 . the values of ( Zs ) & ( I∆n ) encountered in practice are such that there is no difficulty in meeting therequirement given above .

Theearth fault current is limited by the value of ( Zs ) & will be of the same order as occurs when fault protection . is provided byOvercurrent protective devices . It should be checked that the RCD complieswith Regulation 531.2.8. which requiresthat it is capable of withstanding without damage the Thermal & Mechanical Stresses caused by the earth faultcurrent .

Ifan ( RCCB ) to BS-EN 61008 does notincorporate an intentional time delay it is required by the British Standard tooperate within ( 0.04 sec ) at aresidual current of ( 5 I∆n A ) &the designer merely has to check that the circuit is Thermally protected forthat time .

531.2.8.

Wherean RCD is used for fault protection with . but separately from . an Overcurrentprotective device . it shall be verified that the residual current operateddevice is capable of withstanding . without damage . the Thermal &Mechanical Stresses to which it is likely to be subjected in the case of afault occurring on the load side of the point at which it is installed .

 

[amberleaf]

BS-7671:2008. does not Demand that diversity be taken into account but . for the economicdesign of an installation . diversity cannot be ignored .
Thediversity factors used must be optimistic . an adequate margin of safety mustalways be allowed .

Asindicated in Regulation 433.1. whichgives the general requirement concerning Overload protection .
Circuitsshall be so designed that small Overloads of long duration are unlikely toOccur .

 

[amberleaf]

Inspection: 2392-10

Carryout the Initial Verification ( Inspection . Testing & Certification ) of aninstallation to BS-7671:2008

As -&-s rightly asks the Q/As . State the Human Senses that may need to be employed the Initial Verification of an Installation .

Definitions p/29 – Inspection : Examination of an Electrical Installationusing all the Senses as Appropriate . BS-7671:2008 . Amendment No 1 :2011

2392-10. Fundamental Initial Verification of ElectricalInstallation(s) - Three areas to this Unit . :19:
Preparationfor Initial Inspection & Testing .

Inspection.
Testing.

 

[amberleaf]

General Requirement : :19:

Regulation 6101. ( p/156) - ( p/189)

Every installation shall . during erection and/or on completion beforebeing put into service be Inspected & Tested to verify . so far asreasonably practicable . that the requirements of the Regulation have been Met.

As an Inspector 2391-10 :2392-10 : )- The reason(s) for an Inspection & Test of an ElectricalInstallation is to verify that the installation complies with the Regulationswith regards to its ( Design & Construction )

Asan Inspector )- Carrying out the Inspection to for fill these requirements the Regulations . Call forthe following information to be “ MADE AVAILABLE “

Results of the assessment of General characteristics required bySection(s) ( 311. 312 . & 313 . )

Youare looking at .

313.1. General The followingcharacteristics of the supply or supplies . from whatever source . & thenormal range of those characteristics where appropriate . shall be determinedby Calculation . Measurement . Enquiry or Inspection .

i) The nominal voltage(s) & its characteristics includingharmonic distortion . ◄
ii) The nature of the current & frequency . ◄
iii) The prospective short-circuit current at the Origin of theinstallation . ◄
iv) The Earth Fault Loop Impedance of that part of the systemexternal to the installation ( Ze ) ◄
v) The suitability for the requirements of the installation .including the Maximum Demand . ◄
vi) The type & rating of the overcurrent protective device(s)acting at the Origin of the installation . ◄

These characteristics shall be ascertained for an External Supply& shall be determined for a private source . These requirements are equallyapplicable to main supplies & to safety services & standby supplies . ◄

Regulations call for the informationto be made available . ( 514.9. )
( Provide all the necessaryinformation as to circuit type . number of points & their positions . cablesizes . protective device types & their ratings . )

InitialInspection :
611.1. ( p/156 ) – ( p/189 )

Inspectionshall precede testing & shall normally be done with that part of the ( Installation Disconnected from the Supply ) ◄◄◄◄◄◄

Just a Reminder !

Regulation(s) states134.1.1. ( p/19 ) – ( p/21 )
Good workmanship by a Competent Person or Persons under theirsupervision & proper materials shall be used . in the erection of the electricalinstallation . Electrical equipment shall be installed in accordance with theinstructions provided by the ( MANUFACTURES of the EQUIPMENT )

Regulation 612.2. ( p/159 ) – ( p/191 )
Calls for the inspector to confirm that equipment has been selectedin accordance with Section 511 . of theWiring Regulations . & the equipments compliance with the relevant Britishor Equivalent Standard .

 

[amberleaf]

2392-10:

Of what use to us is the Measuring of Earth Fault Loop or ( Zs ) of the circuit .

Ifwe know the value of it we can use “ Ohm(s) Law “ to calculate the Fault Current that will flow. ( if a FaultOccurs )

Formulawe can apply is ( Voltage = Current ) Résistance .

Wecan see that Fault Current & EarthFault Loop Impedance are directly linked . The lower the Earth Fault Loop theHigher the Fault Current & Vice Versa .
Therefore - The lower the Earth Fault Loop / The Higherthe Fault Current . The quicker the Protective Device will operate to cut theCurrent .

Ifwe limit the Maximum Value of the Earth Fault Loop we can be confident that theFault Current will be of a Higher Magnitude to operate the protective device .
Regulation– 411.3.2. :- Automatic Disconnection inCase of a Fault .

 

[amberleaf]

Inspector - has responsibilityplaced upon him as to the Safety of the Installation .
Visual Inspection )- is Essential to assess the safety of anInstallation before testing takes place .

Verification . All measures by means of which compliance of the electricalinstallation with the relevant requirements of BS-7671 are checked .comprising Inspection . Testing & Certification .

 

[amberleaf]

Justa Reminder . 2392-10

612.2.2. Continuityof the Ring Final Conductors’ . :19:

A “ Test “ shall be made to “ Verify “ the Continuity of Each Conductor includingthe Protective Conductor . of every Ring Final Circuit .

 

[amberleaf]

Justa Reminder . 2392-10

RingFinal Circuit )- Correctly connected . Ring Final Circuit showing ( Equal Current on Each Leg of the “ Ring “ ) :19:

 

[amberleaf]

Justa Reminder . 2392-10

( IR ) Insulation Résistance Testingrequires different test voltages for “Certain Circuits “ indentify what circuit(s) require the following voltages . 250V. 500V . 1000V

Isall in the Wording . -&-s

 

[amberleaf]

Competent. Persons responsible for Inspection & Testing . :19:

Competent person . A person who possesses sufficient technicalknowledge . relevant practical skills & experience for the nature of the electricalwork undertaken & is able at all times to prevent danger & where appropriate. injury to him / herself

Inspection& Testing . of the installation will be your responsible for decidingwhether or not an Installation complies with the Regulations in their Entirety. BS-7671:2008

2392-10:
Regulation. 134.1.1. Therefore the person carryingout the Installation . ( p/19 ) – ( p/21 ) Goodworkmanship by Competent persons or Person . Etc

Regulation . 610.5. Inspection & Testing of any Electrical Installation Work mustcomply . ( 156)
Regulation . 610.5. The Verification shall be made by a CompetentPerson . First Amendedment . ▼▼▼

Competent person . A person who possesses sufficient technicalknowledge . relevant practical skills & experience for the nature of the electricalwork undertaken & is able at all times to prevent danger & where appropriate. injury to him / herself

 

[amberleaf]

ConditionReport Inspection Schedule for Domestic & Similar Premises with up to 100ASupply .

Final Circuit(s)

Identification of conductors ( 514.3.1. )
Cables correctly supported throughout their run ( 522.8.5. )
Condition of insulation of live pars ( 416.1. )
Non-sheathed cables protected by enclosure in conduit . ducting ortrunking ( 521.10.1. )
□ To include the integrity of conduit & trunking systems ( metallic & Plastic )

Adequacy of cables for current-carrying-capacity with regard forthe type & nature of installation ( Section 523 )
Coordination between conductors & overload protectivedevices ( 433.1. : 533.2.1. )
Adequacy of protective devices . type & rated current forfault protection ( 411.3. )
Presence & adequacy of circuit protective conductors ( 411.3.1.1. : 543.1. )
Wiring system(s) appropriate for the type & nature of theinstallation & external influences (Section 522. )
Concealed cables installed in prescribed zones ( see Section D . Extent & Limitations’ ) (522.6.101. )
Concealed cables incorporating earthed armour or sheath . or runwithin earthed wiring system . or otherwise protected against mechanical damagefrom nails . screws & the like . see Section D . Extent & limitations .( 522.6..101 : 522.6.103. )
Provision of additional protection by RCD not exceeding 30mA .
□ for all sockets-outlets of rating 20A orless provided for use by ordinary persons unless an exception is permitted ( 411.3.3. )
□ For supply to mobile equipment not exceeding 32A rating for use outdoors (411.3.3. )
□ For cables concealed in walls or partitions ( 522.6.102 : 522.6.103. :
Provision of fire barriers . sealing arrangements & protectionagainst thermal effects ( Section 527 )
Band ii cables segregated / separated from band 1 cables ( 528.1. )
Cables segregated / separated from communications cabling ( 528.2. )
Termination of cables at enclosures - indicate extent of samplingin Section D of the report ( Section 526. )
□ Connections soundly made & under no undue strain 526.6.
□ No basic insulation of a conductor visible outside enclose ( 526.98 )
□ Connections of live conductors adequately enclosed 526.5
□ Adequately connected at point of entry to enclosure ( glands .bushes etc. ) 522.8.5.
Condition of accessories including socket-outlets . switches &joint boxes ( 621.2 – ( iii )
Suitability of accessories for external influences ( 512.2. )

 

[amberleaf]

Examples of items requiring Inspection for an ElectricalInstallation Condition Report .

A Visual Inspection shouldfirstly be made of the External Condition of al Electrical Equipment which isNot – Concealed . :19:

Further detailed Inspection . including partial dismantling ofequipment as required . should be carried out as agreed with the personordering the work . ( 612.2. )

 

[amberleaf]

State:- Indentify the type of circuit thatwould require the following applied voltages when conducting an Insulation Résistancetest . :19:

i) 250V .
ii) 500V .
iii) 1000V .

i) SELV / PELV .
ii) Systems up to & including 500V .
iii) Systems over 500V but under 1000V .

Short& Simple . -&-s

Locations ) containing a Bathor Shower .

Additional protection for all low voltage ( LV ) circuits by RCD not exceeding 30mA ( 701.411.3.3. )
Where used as a protective measure . requirements for SELV orPELV met . ( 701.4.4.4.5. )
Shaver sockets comply with BS-EN 61558-2-5 . formally BS 3535( 701.512.3. )
Presence of supplementary bonding conductors . unless not requiredby BS-7671:2008 . ( 701.415.2. )
Low voltage ( e.g. 230 volt ) socket-outlets sited at least 3m from zone 1 ( 701.512.3. )
Suitability of equipment for external influences for installedlocation in terms of ( IP ) rating (701.512.2. )
Suitability of equipment for installation in a particular zone . (701.512.3. )
Suitability of current-using equipment for particular positionwithin the location ( 701.55. )

 

[amberleaf]

AFundamental principle of ELECTRICAL SAFETY is that NO SINGLE FAULT CONDITION should cause ahazardous situation . Plain English .

Asthe FirstAmendment says .

Definitions . Fault Protection . p/28 .
Protection against electric shock under ( Single Fault Conditions)

Note )- for low voltageinstallations . systems & equipment . fault protection generallycorresponds to protection against indirect contact . mainly with regards tofailure of basic insulation . Indirect contact is “ contact of persons orlivestock with exposed-conductive-parts which have become live ( UNDERFAULT CONDITIONS “

 

[amberleaf]

Electrically Independent Earth Electrodes . p/27

Earth electrodes located at such a distance from one another thatthe maximum current likely to flow through one of them does not significantlyaffect the potential of the OTHER(S) .

 

[amberleaf]

E.I.C.R.

Current – Using Equipment (Permanently Connected )

• Condition of equipment in terms of ( IP ) rating etc . ( 416.2.)
• Equipment does not constitute a fire hazard ( Section 421 )
• Enclosures not damaged / deteriorated so as to impair safety (621.2. (iii))
• Suitability for the environment & external influences (512.2. )
• Security of fixing (134.1.1. )
• Cable entry holes in ceiling above luminaires . sized or sealedso as to restrict the spread of fire .List number & location of luminairesinspected ( Separate page )
• Recessed luminaires ( Down lights )

1) Correct type of lamps fitted .
2) Installed to minimise build-up of heat by use of “ fire rated “fittings . insulation displacement box or similar ( 421.1.1.1. )
3) No signs of overheatingto surrounding building fabric (559.5.1. )
4) No signs of overheatingto conductors / terminations ( 526.1. )

 

[amberleaf]

TheImpedance of the Earth connection must be low enough to ensure that sufficient currentcan flow through the protective device so that it disconnects the supply quickly( 0.4 sec ) & Voltage on the Earthconnection does not RISE more than( 50V )

RCDsoperate at much lower Fault Currents . ◄◄◄ :19:

 

[amberleaf]

701.411.3.3. Additionalprotection by RCDs

Additional protection shall be provided for all circuits of thelocation . by the use of one or more RCDs having the characteristics specified inregulation 415.1.1.
Note : see also Regulation 314.1. ( iv ) & 531.2.4. concerningth avoidance of unwanted tripping . p/166

701.411.3.3. Additionalprotection by RCDs

Additional protection shall be provided for all [ low voltagecircuits of the location ] . by the useof one or more RCDs having the characteristics specified in regulation 415.1.1.
Note : see also Regulation 314.1. ( iv ) & 531.2.4. concerningthe avoidance of unwanted tripping . p/199

 

[amberleaf]

Section705 : Additional protection : Supplementaryequipotential bonding .

Theonly wording that is changed . 705.415.2.1. ( p/183 ) – ( p/216 )

Note : Where a metal grid isnot laid in the floor a TN-C-S supply is not recommended .

Note : Where a metal gridis not laid in the floor . the use of a PME Earthing facility as the means of Earthing for the electrical installationis not recommended .

 

[amberleaf]

Thedifference between the First Amendment & 17[SUP]th[/SUP]Edition

Section 705 : 705.1. Scope :

Theonly wording that is changed .

Rooms . locations & areas for household applications &similar are not covered by this section . p/183 .
Note : Section 705 does not cover electric fence installations .Refer to BS-EN 60335-2-76 & BS-EN 6100-1.

Rooms . locations & areas for household applications &similar are not covered by this section . p/216 .
Note : Section 705 does not cover electric fence installations .Refer to BS-EN 60335-2-76

 

[amberleaf]

Thedifference between the First Amendment & 17[SUP]th[/SUP]Edition

Section 706 : 706.1. p/188 .

Theonly wording that is changed . added on .

This section does not apply to electrical systems as defined inBS-7909 used in structures . sets . mobileunits etc as used for public or private events , touring shows . theatrical .radio . TV or film productions & similar activities of the entertainmentindustry . :19:

 

[amberleaf]

Thedifference between the First Amendment & 17[SUP]th[/SUP]Edition

Theonly wording that is changed .

Section 708 : 708.411.4.. p/223 . TN system ◄ . :19:
The Electricity Safety . Quality & Continuity Regulations 2002 ( ESQCR ) prohibit the connection of aPME earthing facility to any metalwork in a leisure accommodation vehicle (including a caravan )

This does not preclude the use of a PME earthing facility as themeans of earthing for other purposes . such as to the installations ofpermanent buildings .

Note : The requirements of other section of Part 7 . may alsoapply .

 

[amberleaf]

Thedifference between the First Amendment & 17[SUP]th[/SUP]Edition

Theonly wording that is changed .

708.553.1. Plugs & Sockets-outlets . :19:
708.53.1.8. N/C .
708.53.1.9. N/C .
708.53.1.10. N/C .
708.53.1.11. N/C .

708.53.1.12. Each socket-outlet shall be protected by anindividual overcurrent protective device . in accordance with the requirementsof Chapter 43 .

A fixed connection for the supply to each leisure accommodationvehicle ( including caravans ) or tentshall be protected individually by an overcurrent protective device . inaccordance with the requirements of Chapter 43 .

708.53.1.13. N/C .
708.53.1.14. Socket-outletprotective conductors shall not be connected to a PME earthing facility .

The protective conductor of each socket-outlet shall be connectedto an Earth Electrode & therequirements of Regulation 411.5. for aTT system shall be complied with

 

[amberleaf]

Thedifference between the First Amendment & 17[SUP]th[/SUP]Edition

Theonly wording that is changed . Section 709 .

709.1. N/C
709.3. N/C
709.313. N/C
709.41. N/C
709.41.3.5. N/C
709.41.3.6. N/C
709.411.4. TN-system . The Electricity safety . Quality & ContinuityRegulations 2002 ( ESQCR ) prohibit theconnection of a PME earthing facility to any metalwork in a boat .

This does not preclude the use of a PME earthing facility as themeans of earthing for other purposes . such as to the installations of permanentbuildings .

Note : The requirements ofother sections of Part 7 may also apply .

 

[amberleaf]

709.5. N/C
709.512.2. N/C
709.512.2.1. N/C
709.512.2.1.2. N/C
709.512.2.1.2.3. N/C
709.512.2.1.2.4. N/C
709.521. N/C
709.521.1. N/C
709.521.1.4. . N/C
709.521.1.5. The following wiring systems . etc . ii) Non-sheathed cables in cable management systems . rest are the same .
709.521.1.6. . N/C
709.521.1.7. . N/C
709.521.1.8. . N/C
709.531. . N/C
709.531.2. .
709.533. . N/C
709.537.
709.537.2. N/C
709.537.2.1. N/C
709.537.2.1.1. N/C
709.553. N/C
709.553.1. N/C
709.553.1.8. N/C
709.553.1.9. N/C
709.553.1.10.. N/C
709.553.1.11.. N/C
709.553.1.12.. N/C
709.553.1.13. N/C

709.553.1.14. Socket-outletprotective conductors shall not be connected to a PME earthng facility .

Fig – 709.1. p/228 .

Main Switch . L1 / N / PE .
Main Switch . L / N / PE . – drawing the same .

Fig – 709.2. p/229 . – drawing the same .

The rest all the same . / The rest all the same . Instructions for Electricity Supply .

 

[amberleaf]

Section710 : MedicalLocations .

710.411.3.3. Additional Protection .
Wherea medical ( IT ) system is used . additional protection bymeans of an RCD shall NOT be USED.

 

[amberleaf]

Section740 :

740.1. N/C
740.1.1. N/C . Scope :- Note / Note . The permanent electrical installation is excludedfrom the scope .
740.3. N/C .
740.31. N/C .
740.313. N/C .
740.313.1.1. N/C .
740.313.3. ( Phase to Line ) N/C .
740.4. N/C .
740.4.1. N/C .
740.410.3. N/C .

( NEW ) 740.410.3.5. - The protective measures of obstacles ( Regulation 417.2 ) is not permitted .
Placingout of arms reach is acceptable for electric dodgems ( Regulation 740.55.9. )

740.410.3.6. N/C .

( The Electricity at Work Regulation “ 1989 “ ) Design . Erection – Verification ElectricalInstallation in Fairgrounds . ( YES )

740.411. N/C .
740.411.4. TN-
( NEW ) 740.411.4.1. A PME earthing facility shall not be used asthe means of earthing for an installation falling within the scope of thissection .
Note : The ESQCR . prohibitthe use of a PME earthing facility asthe means of earthing for the installation of a caravan or similar construction.
( NEW ) 740.411.4.3. Where the type of system earthing is . TN- . a PEN conductor shall not be used downstream ofthe similar construction .
740.411.6. N/C .
740.415. N/C .
740.415.1. N/C .
740.415.2. N/C .
740.415.2.1. N/C .
740.415.2. N/C .
740.415.2.1. N/C .
740.42. N/C .
740.422.3. N/C .
740.422.3.7. N/C . -

 

[amberleaf]

740.5. N/C .
740.51. N/C .
740.512. N/C
740.512.2. N/C
740.52. N/C
740.521. N/C
740.521.1. – Conduit systemsshall comply with the relevant part of the BS-EN . That’s . it Wording . Rest ok .

NOTE . 2 ) Where mechanical protection of cables is provided . p/221
The following methods are considered to meet the aboverequirements . p/270

(i) ◄ Conduit systems shall . etc .
(ii) ◄ Cable trunking systems & cable . etc .

NOTE . 3 ) Cable of type H07RNF . Changed to NOTE 2 . Restok .

740.526. N/C
740.53. N/C
740.537.1. N/C
740.537.2.1.1. N/C
740.537.2.2. N/C
740.55. N/C
740.55.1. N/C
740.55.1.1. N/C
740.55.1.2. N/C
740.55.1.3. N/C
740.55.1.4. N/C
740.55.1.5. N/C
740.55.3. N/C
740.55.3.1. N/C
740.55.3.2. N/C
740.55.5. N/C
740.55.7. N/C
740.55.8. N/C
740.55.9. N/C
740.551. N/C
740.551.8. N/C
740.6. N/C

 

[amberleaf]

Appendix2 ( Informative ) p/240

StatutoryRegulations & Associated Memoranda .

( vi ) Theatres & otherplaces licensed for public ETC.
conditions of licence under : (a) in England& Wales. The local Government ( Miscellaneous provisions ) Act 1982.
(a) The Secretary of state for the Home Department .

Statutory Regulations & Associated Memoranda . p/292

( vi ) Theatres & otherplaces licensed for public ETC.
conditions of licence under : (a) in England& Wales. The local Government licensingAct 2003.
(a) Department for Culture . Media & Sport .

 

[amberleaf]

UsefulJunk : ( ESQC ) Whereto find it .

17[SUP]th[/SUP] Edition p/241 & FirstAmendment . p293

UnderRegulation 28 . of the Electricity Safety . Quality & Continuity Regulation 2002 . requires distributors to provide the following information to relevantpersons free of charge .

- The maximum prospective short-circuit currentat the supply terminals .
- The maximum earth loop impedance of the earthfault path outside the installation ( Ze )
- The type & rating of the distributorsprotective device or devices nearest to the supply terminals
- The type of earthing system applicable to theconnection .
- The number of phases of the supply
- The frequency of the supply & the extentof the permitted variations .
- The voltage of the supply & the extent ofthe permitted variations .