OP
amberleaf
“ Cables “ & Stuff (1) this will make it easy for you all in one ?
● A Reference Method Indicates , ( The Instillation Method )
● A Final Circuit is Wired between the , ( Distribution Board and Current Using Equipment )
● The Reading Provided when Cross Connecting the Incoming Phase and the Outgoing CPC and Vice versa on a Final Ring Circuit Test would be
( R1 + R2 )
● What’s the Function of a “ Shorting Lead “ when Conducting Continuity , ( R1 + R2 ) Tests ( “ It Completes the Live to CPC Test Loop ” )
● An Initial Check at the End of a Ring Final Circuit would Not Indicate ( Interconnections )
● The Earth Fault Loop Impedance Reading on a Ring Final Circuit is best Achieved Using an Earth Fault Loop Impedance
Tester and , ( BS -1363 Fly Lead )
● When Applying the Rule of Thumb Method , the Value of Prospective Short-Circuit Current for a 3 Phase Supply should be ,
( Twice the Single Phase Value )
● When Carrying Out a Prospective Short Circuit Fault Current Test on 3 Phase Systems the Approximate Fault Current between Phases should be
( Double the Fault Current between One Phase & Neutral )
● the Most Convenient Method of Determining the Value of the Prospective Short Circuit Current at the Origin of an Existing Installation would be ,
( Measurement )
● Method of Determining the External Loop Impedance ( Taking Reading at the Origin of the Supply )
● Earth Fault Loop Impedance Test Performed on a Ring Circuit will Record
( Resistance of Line and Protective Conductors and External Loop Impedance
● Electrical Installations Shall be Divided into Circuits to ( Reduce Unwanted Tripping of RCD )
● To Ensure the Protective Device Operates Requires a ( Low Fault Loop Impedance Path with a Resultant High Earth Fault Current Flow )
● The Effects of Creating a Ring Final Circuit would be that the Overall Resistance of the Conductors would ( Decrease )
● The Resistance in Ohms , of a Conductor ( Increases with Increase of Cable Length )
● if you Double the Length of Wire ( you will Double the Resistance of the Wire )
● if you Double the Cross-Sectional Area of a Wire you will Cut its Resistance in ( Half )
● What is the Preferred Way of Reducing Excessive Voltage Drop in a Circuit , ( Increased Cable CSA )
● the Value will Decrease as we Move Farther away from the Intake Position ( Resistance Increases with Length )
● End to End Resistance Checks would be Carried out on a ! ( Ring Final Circuit )
● To Ensure the Protective Device Operates Requires A ( Low Fault Loop Impedance Path With a Resultant High Earth Fault Current Flow )
● As a Cable Increases in Length , Unlike the Conductor Résistance which Increases with Length ,
( Insulation Résistance Decreases with Length )
Residual Current Operated Circuit Breaker ( BS-EN 61008-1
BS-EN 61008-1 : 2004 Residual Current Operated Circuit –Breaker without Integral Overcurrent Protection for Household
And Similar Use ( RCCBs )
Replaces ( BS-EN 61008-1 - 1995 )
International Relationships ( EN-61008-1: 2004 Identical , IEC-61008-1: 1996
Amended by / AMD 17447 November 2007
BS-EN 61009-1 / 1995
Electrical Accessories , Residual Current Operated Circuit Breaker with Integral Overcurent Protection for Household and
Similar Uses ( RCBOs ) General Rule CU , Regs 41.3
International Equivalent EN-61009-1 / IEC 61009-1: 1991
Replaces by BS-EN 6009-1 : 2004 ( Remains Current ) Appendix 1 p-236
2.1 (a) BS-7671 IEE Regulations Define Extra-Low-Voltage a.c ( Not Exceeding 50V , ps this one is still ongoing
531.2.9 Where , for Compliance with the Requirements of the Regulations for Fault Protection or Otherwise to Prevent Danger , Two or More RCDs are in Series , and where Discrimination in their Operation is Necessary to prevent Danger , The Characteristics of the Devices shall be such that the Intended Discrimination is Achieved ,
411.8.3 Requirements for Fault Protection where a Circuit-Breaker is Used , the Maximum Value of Earth Fault Loop Impedance (Zs) shall be Determined by the Formula in Regulation 411.4.5 , Alternatively , the Values Specified in Table 41.6 may be Used Instead of Calculation for the Nominal Voltages (Uo) and the Type and Ratings of Overcurrent Device Listed therein ,
Operation of the Overcurrent Device in Tables of , 41.3 / 41.4 ( where Circuit Lengths’ need to be Limited )
132.11 Prevention of Electrical Equipment , the Electrical Installation shall be Arranged in such a way that No Mutual Detrimental Influence will Occur between Electrical Installation and Non- Electrical Installation Electrical Installation ( Condensation , Smoke , Heat , Thermal Installation , Electromagnetic Interference , / sec , 515 – 528 ,
Telecommunications Systems-BS 6701 ( Operates 50v d.c / Ringing Voltage in Excess off 80v a.c )
Mac I’ve got Problems with down Loading onto the Forum
My Sizing going to pot
An having to down load one at a time , and dropping it to size 8
PS can you see Dan ,
Sorry Caps I have to stop Down Loading stuff , Amberleaf
● A Reference Method Indicates , ( The Instillation Method )
● A Final Circuit is Wired between the , ( Distribution Board and Current Using Equipment )
● The Reading Provided when Cross Connecting the Incoming Phase and the Outgoing CPC and Vice versa on a Final Ring Circuit Test would be
( R1 + R2 )
● What’s the Function of a “ Shorting Lead “ when Conducting Continuity , ( R1 + R2 ) Tests ( “ It Completes the Live to CPC Test Loop ” )
● An Initial Check at the End of a Ring Final Circuit would Not Indicate ( Interconnections )
● The Earth Fault Loop Impedance Reading on a Ring Final Circuit is best Achieved Using an Earth Fault Loop Impedance
Tester and , ( BS -1363 Fly Lead )
● When Applying the Rule of Thumb Method , the Value of Prospective Short-Circuit Current for a 3 Phase Supply should be ,
( Twice the Single Phase Value )
● When Carrying Out a Prospective Short Circuit Fault Current Test on 3 Phase Systems the Approximate Fault Current between Phases should be
( Double the Fault Current between One Phase & Neutral )
● the Most Convenient Method of Determining the Value of the Prospective Short Circuit Current at the Origin of an Existing Installation would be ,
( Measurement )
● Method of Determining the External Loop Impedance ( Taking Reading at the Origin of the Supply )
● Earth Fault Loop Impedance Test Performed on a Ring Circuit will Record
( Resistance of Line and Protective Conductors and External Loop Impedance
● Electrical Installations Shall be Divided into Circuits to ( Reduce Unwanted Tripping of RCD )
● To Ensure the Protective Device Operates Requires a ( Low Fault Loop Impedance Path with a Resultant High Earth Fault Current Flow )
● The Effects of Creating a Ring Final Circuit would be that the Overall Resistance of the Conductors would ( Decrease )
● The Resistance in Ohms , of a Conductor ( Increases with Increase of Cable Length )
● if you Double the Length of Wire ( you will Double the Resistance of the Wire )
● if you Double the Cross-Sectional Area of a Wire you will Cut its Resistance in ( Half )
● What is the Preferred Way of Reducing Excessive Voltage Drop in a Circuit , ( Increased Cable CSA )
● the Value will Decrease as we Move Farther away from the Intake Position ( Resistance Increases with Length )
● End to End Resistance Checks would be Carried out on a ! ( Ring Final Circuit )
● To Ensure the Protective Device Operates Requires A ( Low Fault Loop Impedance Path With a Resultant High Earth Fault Current Flow )
● As a Cable Increases in Length , Unlike the Conductor Résistance which Increases with Length ,
( Insulation Résistance Decreases with Length )
Residual Current Operated Circuit Breaker ( BS-EN 61008-1
BS-EN 61008-1 : 2004 Residual Current Operated Circuit –Breaker without Integral Overcurrent Protection for Household
And Similar Use ( RCCBs )
Replaces ( BS-EN 61008-1 - 1995 )
International Relationships ( EN-61008-1: 2004 Identical , IEC-61008-1: 1996
Amended by / AMD 17447 November 2007
BS-EN 61009-1 / 1995
Electrical Accessories , Residual Current Operated Circuit Breaker with Integral Overcurent Protection for Household and
Similar Uses ( RCBOs ) General Rule CU , Regs 41.3
International Equivalent EN-61009-1 / IEC 61009-1: 1991
Replaces by BS-EN 6009-1 : 2004 ( Remains Current ) Appendix 1 p-236
2.1 (a) BS-7671 IEE Regulations Define Extra-Low-Voltage a.c ( Not Exceeding 50V , ps this one is still ongoing
531.2.9 Where , for Compliance with the Requirements of the Regulations for Fault Protection or Otherwise to Prevent Danger , Two or More RCDs are in Series , and where Discrimination in their Operation is Necessary to prevent Danger , The Characteristics of the Devices shall be such that the Intended Discrimination is Achieved ,
411.8.3 Requirements for Fault Protection where a Circuit-Breaker is Used , the Maximum Value of Earth Fault Loop Impedance (Zs) shall be Determined by the Formula in Regulation 411.4.5 , Alternatively , the Values Specified in Table 41.6 may be Used Instead of Calculation for the Nominal Voltages (Uo) and the Type and Ratings of Overcurrent Device Listed therein ,
Operation of the Overcurrent Device in Tables of , 41.3 / 41.4 ( where Circuit Lengths’ need to be Limited )
132.11 Prevention of Electrical Equipment , the Electrical Installation shall be Arranged in such a way that No Mutual Detrimental Influence will Occur between Electrical Installation and Non- Electrical Installation Electrical Installation ( Condensation , Smoke , Heat , Thermal Installation , Electromagnetic Interference , / sec , 515 – 528 ,
Telecommunications Systems-BS 6701 ( Operates 50v d.c / Ringing Voltage in Excess off 80v a.c )
Mac I’ve got Problems with down Loading onto the Forum
My Sizing going to pot
An having to down load one at a time , and dropping it to size 8
PS can you see Dan ,
Sorry Caps I have to stop Down Loading stuff , Amberleaf
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