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● “ Continuity of Protective Conductors “ ( Dead Test ) ( Guides Note -3 ) GN-3
Instrument , Continuity Tester ( Set on Low Ohms Scale )
( Multimeter can be Used to Measure the Voltage between two Positions )
612.2.1 No Load Voltage between 4 / 24V
Short Circuit Current of not Less than 200mA ( Ia Ief )
Earth Loop Impedance Test to Verify Continuity ( Measures Résistance of Conductors’ )
● “ Continuity Ring Final Circuit Conductors “ ( Dead Test )
Instrument , Continuity Tester ( ( Set on Low Ohms Scale )
612.2.2 No Load Voltage between 4 / 24V
Short Circuit Current of not Less than 200mA ( Ia Ief )
(1) Test is Undertaken to Ensure that all Conductors of the Ring Final Circuit are Continuous ,
(2) Conductors’ have Not been Bridged Creating Multiple Loops ,
(3) That all Connections are Electrically and Mechanically Sound ,
Step 1 , Isolated and Disconnected from The Supply
Step 2 , Phase & Neutral Conductors are Now Cross Connected so that the Outward Leg of the Phase Connects to the
Neutral and the inward Leg of the Phase Connects to the Outward Leg of the Neutral
Readings are Now taken between Phase and Neutral at each Socket
Readings at each Socket Outlet should be within 0.05Ω of each Other
(i) Failure to be within this Limit would Highlight Loose Terminations
(ii) Significant Increase at a Socket would Indicate that it is a Spur , Bridges within the Circuit would be Indicated by a
Gradual Decrease on the Return Leg
Step 3 , Phase & CPC Loops are now Interconnected so that the Outward Leg of the CPC Connects to the inward Leg
Of the Phase and the inward Leg of the CPC Connects to the Outward Leg of the Phase ,
(iii) Measured Value may be Recorded as ( R1 + R2 )
● “ Polarity “ ( Dead Test )
Instrument , Continuity Tester ( Set on Low Ohms Scale )
612.6 No Load Voltage between 4 / 24V
Short Circuit Current of not Less than 200mA ( Ia Ief )
It must be Confirmed by Test , Every Fuse and Single-Pole Control and Protective Device is Connected in the Line Conductor Only ,
612.6 (ii)
Contact Bayonet and Edison Screw Lampholder(s) have the Outer or Screwed Contacts Connected to the Neutral ,
The Phase Conductor is Connected to the Centre Termination of an Edison Screw Lampholder Only , ←←
612.6 (iii)
Wiring has been Correctly Connected to Socket-Outlets and Similar Accessories ,
(i) All Sockets Polarities’ are Correct ,
(ii) That the Polarity of the Incoming Supply is Correct / Before the Supply is Energised ,
Your Checking to Ensure the Supply Authorities Polarity is Correct ,
Acceptable to Place a Temporary Bridge Between Phase & Earth in the Consumers Unit ,
(i) Test between Switched Live & Earth at the Ceiling Rose to Confirm Polarity
(ii) Operate Switch to Confirm Polarity
(iii) HSE Guidance Note GS-38 ↔ Electrical Equipment
→ You Should always Prove Isolation ← (iv) Use a Proving Unit
Then Test for Circuit is Dead , then Prove GS-38 it still Works
(v) Once the Supply is Energised Correct Polarity of the Incoming Supply may be Established Using An Approved
Approved Voltage Tester at the Mains , ( after Proving that GS-38 Voltage Indicator is Working )
(vi) Remember to Remove your Temp link , Phase & Earth
Once the Inspection & Testing has been Completed it is then of Vital Importance that the Relevant Documentation is Completed
Three Signatures’ are Required on the Electrical Installation Certificate , ( Three Signatures are still Required )
(i) Designer (ii) Installer (iii) Tester
Appendix 6 , (ix) When making Out and Signing a Form on behalf of a Company or Other Business Entity ,
Individuals should State ( for Whom they are Acting ) 632.3
Electrical Installation Certificate ,
To be Used When One Person is Responsible for the Design , Construction , Inspection & Testing of an Installation
Electrical Installation Certificate
This Certificate is Intended to be Issued Only for a New Electrical Installation or for New Work Associated with an
Addition or Alteration to an Existing Installation ,
It should Not have been Issued for the Inspection of an Existing Electrical Installation , A “ Periodic Inspection Report “
Should be Issue for such an Inspection ,
There are Three Main Reasons why we Certificate an Installation ,
(i) Addition to an Installation (ii ) an Alteration to an Installation (iii) New Installation
Which Certificate is Issued the Original should be Given to the Person Ordering the Work and a Duplicate by the Contractor , 632.1
Particular Care should be Given when Completing the Extent and Limitations Details of Periodic and Close Liaison ,
With the Client , is Essential at this Time , This is to Ensure that the Client is Fully Informed of what will and what Not be Tested ,
( All must be Negotiated with the Client )
631.2 Upon Completion of the Periodic Inspection & Testing of an Existing Instillation ,
Periodic Inspection Report , Shall be Provided , such Documentation shall Include Details of the Extent of the Installation & Limitations
Of the Inspection & Testing Covered by the Report , Together with a Record of the Inspection and the Results of Testing ,
621.4
The Extent and Results of the Periodic Inspection & Testing of an Installation , or any Part of an Installation , shall be Recorded ,
Person Ordering the Work : Periodic (i) First Periodic Test – Designer / Installer
(ii) Further Periodic Test – Tester / Inspector
(iii) Extent & Limitations Agreed with / Person Ordering The Work ,
Periodic Inspection Report
Notes , (5 ) p-339
The Extent and Limitations “ Box should fully Identify the Elements of the Installation that are Covered by the Report and
Those that are Not this Aspect having been Agreed with the Client and Other Interested Parties before the
The Inspection & Testing is Carried Out ,
The “ Extent and Limitations “ Box should fully Identify the Extent of the Installation Covered by this Report and any Limitations on the Inspection & Tests the Contractor should have Agreed these Aspects with you and any Other
Interested Parties ( Licensing Authority , Insurance Company , Building Society etc , before the Inspection was Carried Out
4118.3
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 41.4 may be Used instead of Calculations
For the Nominal Voltages ( Uo ) and the Types and Ratings of Overcurrent Device listed therein ,
What is the Maximum Earth Fault Loop Impedance Allowed when Using a 32A Type C
Circuit Breaker Giving s Disconnection time of 5sec , the Nominal Voltage to Earth ( Uo ) is 55v ↔ 41.6 ( 0.17Ω )
PS is this Helping anybody Please let me Know ,
When I don’t hear anything My Computer does Hand Stands , Amberleaf
Keep at it Chaps there’s always tomorrow ,
The On Site Guide & Guidance Note 3
Contain Detailed Information on how to Carry Out a Series of Electrical Tests on an Installation ,
612.2.1 Continuity of Protective Conductors ( Dead Test ) GN- 3
612.2.2 Continuity of Ring Final Circuit Conductors’ ( Dead Test ) GN- 3
612.3. Insulation Résistance ( Dead Test ) GN- 3
612.6 Polarity ( Dead Test ) GN- 3 By Continuity Methods
612.7 Earth Electrode Résistance ( Dead Test ) GN- 3 Battery ,
612.9 Earth Fault Loop Impedance ( Energized ) GN- 3
612.11 Prospective Fault Current ( Energized ) GN- 3
612.13. Functional Testing ( Energized ) GN- 3
In Addition to an Inspection these Test form the Basis of any Electrical Commissioning Process of an Electrical Installation ,
There are Two Main Types of Test / Commissioning Undertaken there are Initial Testing ,
And Periodic Testing , as the Name Suggests Initial Testing is Undertaken to Ensure the Installation is Safe and in Compliance with BS-7671 Prior to being Handed Over to the Client ,
Whilst a Periodic “ Report “ is Undertaken at Regular Intervals whilst the Installation is in Service to Ensure the Installation
Remains Safe and Fit for Use ,
The Sequence of Electrical Tests Undertaken Differs Slightly Between the Two ,
Instrument , Continuity Tester ( Set on Low Ohms Scale )
( Multimeter can be Used to Measure the Voltage between two Positions )
612.2.1 No Load Voltage between 4 / 24V
Short Circuit Current of not Less than 200mA ( Ia Ief )
Earth Loop Impedance Test to Verify Continuity ( Measures Résistance of Conductors’ )
● “ Continuity Ring Final Circuit Conductors “ ( Dead Test )
Instrument , Continuity Tester ( ( Set on Low Ohms Scale )
612.2.2 No Load Voltage between 4 / 24V
Short Circuit Current of not Less than 200mA ( Ia Ief )
(1) Test is Undertaken to Ensure that all Conductors of the Ring Final Circuit are Continuous ,
(2) Conductors’ have Not been Bridged Creating Multiple Loops ,
(3) That all Connections are Electrically and Mechanically Sound ,
Step 1 , Isolated and Disconnected from The Supply
Step 2 , Phase & Neutral Conductors are Now Cross Connected so that the Outward Leg of the Phase Connects to the
Neutral and the inward Leg of the Phase Connects to the Outward Leg of the Neutral
Readings are Now taken between Phase and Neutral at each Socket
Readings at each Socket Outlet should be within 0.05Ω of each Other
(i) Failure to be within this Limit would Highlight Loose Terminations
(ii) Significant Increase at a Socket would Indicate that it is a Spur , Bridges within the Circuit would be Indicated by a
Gradual Decrease on the Return Leg
Step 3 , Phase & CPC Loops are now Interconnected so that the Outward Leg of the CPC Connects to the inward Leg
Of the Phase and the inward Leg of the CPC Connects to the Outward Leg of the Phase ,
(iii) Measured Value may be Recorded as ( R1 + R2 )
● “ Polarity “ ( Dead Test )
Instrument , Continuity Tester ( Set on Low Ohms Scale )
612.6 No Load Voltage between 4 / 24V
Short Circuit Current of not Less than 200mA ( Ia Ief )
It must be Confirmed by Test , Every Fuse and Single-Pole Control and Protective Device is Connected in the Line Conductor Only ,
612.6 (ii)
Contact Bayonet and Edison Screw Lampholder(s) have the Outer or Screwed Contacts Connected to the Neutral ,
The Phase Conductor is Connected to the Centre Termination of an Edison Screw Lampholder Only , ←←
612.6 (iii)
Wiring has been Correctly Connected to Socket-Outlets and Similar Accessories ,
(i) All Sockets Polarities’ are Correct ,
(ii) That the Polarity of the Incoming Supply is Correct / Before the Supply is Energised ,
Your Checking to Ensure the Supply Authorities Polarity is Correct ,
Acceptable to Place a Temporary Bridge Between Phase & Earth in the Consumers Unit ,
(i) Test between Switched Live & Earth at the Ceiling Rose to Confirm Polarity
(ii) Operate Switch to Confirm Polarity
(iii) HSE Guidance Note GS-38 ↔ Electrical Equipment
→ You Should always Prove Isolation ← (iv) Use a Proving Unit
Then Test for Circuit is Dead , then Prove GS-38 it still Works
(v) Once the Supply is Energised Correct Polarity of the Incoming Supply may be Established Using An Approved
Approved Voltage Tester at the Mains , ( after Proving that GS-38 Voltage Indicator is Working )
(vi) Remember to Remove your Temp link , Phase & Earth
Once the Inspection & Testing has been Completed it is then of Vital Importance that the Relevant Documentation is Completed
Three Signatures’ are Required on the Electrical Installation Certificate , ( Three Signatures are still Required )
(i) Designer (ii) Installer (iii) Tester
Appendix 6 , (ix) When making Out and Signing a Form on behalf of a Company or Other Business Entity ,
Individuals should State ( for Whom they are Acting ) 632.3
Electrical Installation Certificate ,
To be Used When One Person is Responsible for the Design , Construction , Inspection & Testing of an Installation
Electrical Installation Certificate
This Certificate is Intended to be Issued Only for a New Electrical Installation or for New Work Associated with an
Addition or Alteration to an Existing Installation ,
It should Not have been Issued for the Inspection of an Existing Electrical Installation , A “ Periodic Inspection Report “
Should be Issue for such an Inspection ,
There are Three Main Reasons why we Certificate an Installation ,
(i) Addition to an Installation (ii ) an Alteration to an Installation (iii) New Installation
Which Certificate is Issued the Original should be Given to the Person Ordering the Work and a Duplicate by the Contractor , 632.1
Particular Care should be Given when Completing the Extent and Limitations Details of Periodic and Close Liaison ,
With the Client , is Essential at this Time , This is to Ensure that the Client is Fully Informed of what will and what Not be Tested ,
( All must be Negotiated with the Client )
631.2 Upon Completion of the Periodic Inspection & Testing of an Existing Instillation ,
Periodic Inspection Report , Shall be Provided , such Documentation shall Include Details of the Extent of the Installation & Limitations
Of the Inspection & Testing Covered by the Report , Together with a Record of the Inspection and the Results of Testing ,
621.4
The Extent and Results of the Periodic Inspection & Testing of an Installation , or any Part of an Installation , shall be Recorded ,
Person Ordering the Work : Periodic (i) First Periodic Test – Designer / Installer
(ii) Further Periodic Test – Tester / Inspector
(iii) Extent & Limitations Agreed with / Person Ordering The Work ,
Periodic Inspection Report
Notes , (5 ) p-339
The Extent and Limitations “ Box should fully Identify the Elements of the Installation that are Covered by the Report and
Those that are Not this Aspect having been Agreed with the Client and Other Interested Parties before the
The Inspection & Testing is Carried Out ,
The “ Extent and Limitations “ Box should fully Identify the Extent of the Installation Covered by this Report and any Limitations on the Inspection & Tests the Contractor should have Agreed these Aspects with you and any Other
Interested Parties ( Licensing Authority , Insurance Company , Building Society etc , before the Inspection was Carried Out
4118.3
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 41.4 may be Used instead of Calculations
For the Nominal Voltages ( Uo ) and the Types and Ratings of Overcurrent Device listed therein ,
What is the Maximum Earth Fault Loop Impedance Allowed when Using a 32A Type C
Circuit Breaker Giving s Disconnection time of 5sec , the Nominal Voltage to Earth ( Uo ) is 55v ↔ 41.6 ( 0.17Ω )
PS is this Helping anybody Please let me Know ,
When I don’t hear anything My Computer does Hand Stands , Amberleaf
Keep at it Chaps there’s always tomorrow ,
The On Site Guide & Guidance Note 3
Contain Detailed Information on how to Carry Out a Series of Electrical Tests on an Installation ,
612.2.1 Continuity of Protective Conductors ( Dead Test ) GN- 3
612.2.2 Continuity of Ring Final Circuit Conductors’ ( Dead Test ) GN- 3
612.3. Insulation Résistance ( Dead Test ) GN- 3
612.6 Polarity ( Dead Test ) GN- 3 By Continuity Methods
612.7 Earth Electrode Résistance ( Dead Test ) GN- 3 Battery ,
612.9 Earth Fault Loop Impedance ( Energized ) GN- 3
612.11 Prospective Fault Current ( Energized ) GN- 3
612.13. Functional Testing ( Energized ) GN- 3
In Addition to an Inspection these Test form the Basis of any Electrical Commissioning Process of an Electrical Installation ,
There are Two Main Types of Test / Commissioning Undertaken there are Initial Testing ,
And Periodic Testing , as the Name Suggests Initial Testing is Undertaken to Ensure the Installation is Safe and in Compliance with BS-7671 Prior to being Handed Over to the Client ,
Whilst a Periodic “ Report “ is Undertaken at Regular Intervals whilst the Installation is in Service to Ensure the Installation
Remains Safe and Fit for Use ,
The Sequence of Electrical Tests Undertaken Differs Slightly Between the Two ,
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