Best Practices in Electrical Safety by Er. Edward Low Kah Loong
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Transcript of Best Practices in Electrical Safety by Er. Edward Low Kah Loong
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Electrical Safety
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Observing Electrical Safety
in Workplaces
10th July 2014
Presenter :
Er. Edward LowEngineering Director
Quality Power Management Pte Ltd
Mr Edward Low Kah Loong, Engineering Director
A Singapore-Registered Professional Engineer
Graduated from the University of Tennessee, with aBachelor of Science in Electrical Engineering (B.Sc.)
Twelve years with SP PowerGrid Ltd. as a DeputyDirector and an authorised switching engineer operating
up to 66kV voltage level.
An ASEAN Chartered Professional Engineer.
Represented Singapore in the ASEANs Heads OfASEAN Power Utilities/Authorities (HAPUA) as the
Chairman of HAPUA Working Group that focuses on
Distribution and Power Reliability & Quality.
Was instrumental in formulating many SP PowerGridstandard operating procedures as well as maintenance
standards, especially in the area of predictive
maintenance.
Er. Edward Low
Introduction
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Electrical Safety
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Overall View of Electrical Safety
- Regulatory Aspects
Type of
Installation
Code of Practice
Permanent
Installations
SS CP 5:1998 Electrical Installations
SS CP 555: 2010 (formerly CP 33) Lightning Protection
SS 538:2008 (formerly CP 17) Maintenance of Electrical Equipment of Electrical Installation
SS 551:2009 (formerly CP 16) Earthing
Temporary
Installations
SS CP 88-1:2001 Construction and Building Sites
SS CP 88-2:2001 Festive Lighting, Trade Fairs, Mini-Fairs
and Exhibition Sites
SS CP 88-3:2001 Ship-Building and Ship-Repairing Yards
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14 Items to be Registered/Approved from Spring Singapore Before Use
1. 3-pin rectangular type 13-Amp plugs2. Fuses ( less than or equal to 13 amperes ) for
use in plugs 3. 3-pin round type 15-Amp plugs 4. Multi-way Adaptors 5. 3-pin Portable Socket-outlets 6. Portable Cable Reels 7. Instantaneous Electric Water Heaters8. Mains Pressure Electric Storage Water Heaters
Overall View of Electrical Safety
14 Prescribed Items9. Earth Leakage Circuit Breakers 10. 3-pin 13-Amp Switched Socket-outlets11. 3-pin round type 15-Amp Switched Socket-
outlets 12. 13-Amp Wall Switch 13. Ballasts14. Isolating Transformers
Overall View of Electrical Safety
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Electrical Safety
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Safety Equipment
Overall View of Electrical Safety
Non-compliance Temporary Supply Switchboard not secured
DB was just sitting on top of hollow block; not secured Rectified - DB mounted on stand
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Electrical Safety
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Non-Compliance - Wrong Polarity. Temporary DB with male sockets connected to Live
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Earth Work and Cable Protection
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Electrical Safety
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Arc Flash Safety
Arc Flash and Blast
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Electrical Safety
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Arc Flash and Blast
Arc Flash
Point of Arc Flash Temperature 35,000F
This heat can cause molten metals to vaporise and produce a plasma fireball
Expansion of super-heated air & vaporizing metals will create extreme pressure
This can cause great danger
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Electrical Safety
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An LEWs Perspective
Before Stepping Into A Switchroom:
Smell for ionization, foul or burning smell
Hear for humming, hissing or rapid energizing andde-energizing of contactors
See, look out for irregularities like improper installation,broken handle of MCCB or sign of water seepage. Donot step or touch the water surrounding the switchboard, it could be live
Feel the heat in the switch room
Touch for vibration, surface temperature
Best Practices to Ensure Electrical Safety
Competency
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Best Practices to Ensure Electrical Safety
Maintain Good Housekeeping
Areas like passageway, surrounding of switch room
should be kept clear
Best Practices to Ensure Electrical Safety
Quality of Work
Loose cable dangling without mechanical protection
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Best Practices to Ensure Electrical Safety
Quality of Work
Lightning conductor removed by roof
retrofitting contractor
Best Practices to Ensure Electrical Safety
Pest Control
Ensure rodent bait is used
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Best Practices to Ensure Electrical Safety
Signs of Overheating
Check for any overloading or overheating on the main
switchboard as the surface should not be hot and does
not produce any unusual/ excessive humming sound
Best Practices to Ensure Electrical Safety
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Best Practices to Ensure Electrical Safety
Burnt Air Circuit Breaker
Best Practices to Ensure Electrical Safety
Expired or Soon-To-Be Expired
Fire Extinguishers
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Best Practices to Ensure Electrical Safety
On-Time Servicing
Servicing regime should follow the Maintenance Matrix
in SS 538: 2008 published by SPRING Singapore
What Makes A Good Inspection Report?
Clear (eg. Refers to Regulations / Photos)
Accurate
Detailed
Timely
Provides Advisory
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An Inspection Report Sample
An Inspection Report Sample
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An Inspection Report Sample
An Inspection Report Sample
Report and Defect List
Received and Acted Upon by Management Quickly!
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Its All In The Details1. Maintenance Regime (Servicing, Inspection etc.)2. Accessibility / Housekeeping (Cleanliness, Eqpt. etc)3. Improper Installation4. Protection Systems5. Protection Against Spillage / Rodents6. Instrument & Indicating Lights7. Protective Relays8. Readings Loading / Temperature9. Signs of Overheating10. Excessive Humming Noise11. Fire Extinguisher
Inspection Findings
Er. Edward LowEngineering DirectorQuality Power Management Pte Ltd 16 Boon Lay Way, #01-43 Tradehub21Singapore 609965www.qpower.com.sg