Inspection & Test Overview 30.11.05 suite412

Why does an electrical installation require Inspection and Testing? BS 7671:2001 711-01-01 Every installation shall, during erection and on completion before being put into service be inspected and tested to verify, so far as is reasonably practicable, that the requirements of the Regulations have been met 30.11.05 suite412

Before being put into service “It’s ok misses we've finished the electric's, we've put the supply on”. “be back next week to test it” Simple: If it has not been inspected and tested, it should not be energised. No discussion - No connection! 30.11.05 suite412

The inspection shall be made to verify that the installed electrical equipment is: (i) in compliance with Section 511 compliance with standards - British Standards or, Harmonized Standard (ii) correctly selected and erected in accordance with the Regulations (iii) not visibly damaged or defective so as to impair safety 30.11.05 suite412

Certification 30.11.05 suite412

Every Inspection and Test must be recorded on the appropriate certificate 30.11.05 suite412

The Installation Certificate “Where do I use it?” 30.11.05 suite412

include a new circuit For new installations For alterations or additions that include a new circuit 30.11.05 suite412

The Installation Certificate “what does it consist of?” 30.11.05 suite412

Installation address - Must include post code Details of client Installation address - Must include post code Description and extent of the installation Signatories those with a responsibility for (i) The design (ii) The construction (iii) The inspection and testing Recommend date for next inspection 30.11.05 suite412

THE DESIGNER Who recommends the date for the next inspection (Periodic) ? THE DESIGNER 30.11.05 suite412

THE INSPECTOR Who recommends the date for subsequent inspections and tests (Periodic) ? THE INSPECTOR 30.11.05 suite412

SUPPLY CHARACTERISTICS AND EARTHING ARRANGEMENTS TN-C (of specialist nature) TN-S TN-C-S TT IT (of specialist nature) 30.11.05 suite412

Number and type of live conductors whether the supply is a.c. or d.c. number of phases number of poles 30.11.05 suite412

Nature of Supply Parameters nominal voltage U/Uo (V) Fixed nominal frequency, f (Hz) Fixed prospective fault current, Ipf (kA) external loop impedance Ze () 30.11.05 suite412

Prospective Fault Current (Ipf) kA May be obtained by Measurement Calculation Enquiry Public Electricity Supply (PES) 30.11.05 suite412

External loop impedance Ze May be obtained by Measurement Calculation Enquiry 30.11.05 suite412

Supply Protective Device Characteristics (PES) Type i.e. BS 1361 Type 2, BS 88 Nominal current rating (A) 30.11.05 suite412

Particulars of installation referred to in the certificate Means of earthing Maximum demand (Not rating of service head fuse) Details of earth electrode resistance if applicable 30.11.05 suite412

Review - Characteristics of Supply 313-01-01 The following characteristics of the supply or supplies, from whatever source shall be determined by calculation, measurement, enquiry or inspection 30.11.05 suite412

The nature of the current and frequency The nominal voltage/s The nature of the current and frequency The prospective short circuit current Earth fault loop impedance Ze Maximum demand after diversity Type and rating of overcurrent device at the origin of the installation 30.11.05 suite412

Main Protective Conductors Earthing Conductor Material Cu - copper etc c.s.a Connection verified (low resistance ohmmeter) 30.11.05 suite412

Main Equipotential Bonding Conductors Material Cu - copper etc c.s.a Connection verified (low resistance ohmmeter recommended maximum value 0.05) 30.11.05 suite412

BS /BS EN Number Number of Poles Current Rating Voltage Rating 30.11.05 suite412

Main Switch or Circuit Breaker BS Type and Number of Poles Current rating (A) Voltage rating Fuse rating or setting Location RCD In (mA) and operating time (mS) at In 30.11.05 suite412

Comments on Existing Installation To be used for alterations or additions 30.11.05 suite412

Schedule of items inspected Refer to Schedule Common to both Installation & Periodic Inspection Report 30.11.05 suite412

The Visual Inspection Footnote to Regulation 711-01-01 Chapter 71 Initial Verification Footnote to Regulation 711-01-01 Precautions shall be taken to avoid danger to persons and to avoid damage to property and installed equipment during inspection and testing 30.11.05 suite412

The Visual Inspection 712 Inspection Inspection shall precede testing and shall normally done with that part of the installation under inspection disconnected from the supply 30.11.05 suite412

Safe Isolation Test equipment to GS 38 Fused Leads Finger Guards Probes 4mm max pref 2mm max 30.11.05 suite412

Schedule of Test Results Refer to Schedule Common to both Installation & Periodic Inspection Report 30.11.05 suite412

Periodic Inspection Report (PIR) Change of use or ownership As a result of damage. Fire - Flood etc Electrical overloading To ensure compliance/continued compliance with the Regulations Mortgage/Insurance request Local bylaws - Places of public entertainment - Theatres/Cinemas etc 30.11.05 suite412

Periodic Inspection Report (PIR) Some areas common to Installation Certificate, i.e. Details of client and installation Recommended next inspection date Signature of competent person Supply characteristics Particulars of installation 30.11.05 suite412

Schedule of inspection (PIR) continued Schedule of inspection Schedule of test results 30.11.05 suite412

Major Differences Estimated age of installation? Evidence of alterations or additions? Are there records available? Extent and limitations Observations and recommendations 30.11.05 suite412

Extent and Limitations Extent - Details indicating what part/s of the installation will be inspected and tested Limitations - State exactly what items are excluded, i.e. portable appliances, fire alarm systems, emergency lighting, cctv, door entry systems, smoke detectors etc. 30.11.05 suite412

Departures from BS 7671 must be allocated a numerical code 1. requires urgent attention 2. Requires improvement 3. Requires further investigation 4. Does not comply with BS 7671 - imply that installation is unsafe 30.11.05 suite412

Minor Works An alteration or addition to an existing installation that does not include the addition of a new circuit, i.e. spur to radial or ring circuit etc. 30.11.05 suite412