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Executive Summary

Since last 2 years many flats in our building had issues with their electrical appliances, switch boards and other electrical installations. Due to proximity to the sea, rate of deterioration of electrical appliances and goods in our building is faster.

There were 2 alarming incidences of fire due to malfunctioning of Air Conditioners and 3-4 cases of fire due to overload, loose connections and short circuit .

The objective of my project was to do a thorough inspection of flats for protection against overload and short circuit.

SINCE MOST OF FIRES IN OFFICE / RESIDENTIAL PREMISES ARE DUE TO ELECTRICAL FIRE AND MANY ORIGINATING FROM INSIDE THE PREMISES :

ELECTRICAL FIRES can be defined as a fire where an electric current or electrical fault is found to have been the ignition source. The main reasons are:

  1. Overload: When the electric current flowing in the wires exceeds the rating of the wires / cables,the wiring heats up and melts the insulation and can set fire to flammable material nearby.
  2. Loose Connections: The current flowing through the wiring encounters resistance at the connection and generates heat. This can start a fire at the back of a power point, in a wiring junction box in the ceiling, above light fittings or inside a switchboard.
  3. Short Circuit: A connection of comparatively low resistance accidentally made between points on a circuit between which resistance is normally much greater.

Objectives of Electrical Safety Audit

The purpose of an electrical safety Inspection or Audit is to diagnose potentially hazardous electrical situations or problems, before they become a genuine danger and provide corrective actions for these situations.

 

Scope of Electrical Safety Audit

Electrical safety audit is intended to confirm that the electrical wiring and installation meets all requisite standards and the installation is safe.
The audit cover the following:
Detailed physical inspection and safety check of the entire electrical installation
  1. Meter Rating
  2. MCB / MCCB rating (meter room)
  3. Incoming cable / Wires
  4. Earthing
  5. Panel Distribution board (D.B.) – Incomer/ Outgoing MCB / ELMCB
  6. B. / Panel wiring.
  7. Outgoing cable / circuit wiring.
  8. Thermography (Thermal Imaging) analysis of the office-D.B, Switch boards, Junction box etc. and helping diagnose problems by detecting hot spots and identifying potentially hazards.
    • Identification of Overloaded Equipment
    • Identification of overheated components
    • Identify loose connections
    • Identify Cable faults
    • Identify Phase Imbalances
    • Identify faulty components
  9. Carrying out power analysis and checking overloading / load balancing etc.
  10. Carrying out voltage and earthing check for all the Plug points.
  11. Carrying out checking of ELCB / RCBO tripping.
  12. Carrying out insulation resistance check for wires / Circuit (random 2 Nos.).

Report

  1.   Reports on overall wiring and Installation (including pictures, requiring remedial measures.)
  2.   Thermography images of Hot spots requiring attention.
  3.   Load Analysis reports.
  4.   Reports of Voltage and earthing of all the Plug points.
  5.   Recommend remedial measures as applicable.
  6.   Cost estimation for carrying out the above remedial measures (If Any)
  7. Load chart.

Testing Instruments used for Audit

  1. FLUKE Ti 40 TERMAL IMAGING CAMERA
  2.   FLUKE 434 POWER QUALITY ANALYSER
  3.   METRABI – ELCB / RCBO TESTER
  4.   MOTWANI MUTIMETER / MEGER
  5.   HTC- EARTH TESTER
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