Electrical safety is a mystery to many safety engineers world over. Breaking into the world of electrical installations is next to impossible. This document is prepared to help safety engineers to ...
HSEQ FORUMFull description
Electrical Safety Talk
Full description
This covers the electrical safety auditing covering scope, approach,methodology, etc. and can be used for safety engineers.
Lecture Note
This is a comprehenive Electrical Safety checkpoint compliation based on author's auditing experience and consulting experience of petrochemical plants.
Electric installation and work related is one of source of hazards. Ineffective electrical installation may lead to many injuries as electric shock, fire, and explosion. The main gate to imp…Deskripsi lengkap
A short document covering the basics of electrical safety
safety
Swp on electrical safety which is applicable in KNPC refinaryFull description
Electrical safety auditingFull description
PETROLEUM DEVELOPMENT OMAN-ELECTRICAL SAFETYFull description
Electrocutions rank 4th in work related fatalities
Nearly 8,000 electrical related injuries occur annually
3,600 disabling and 4,000 non-disabling injuries each year
Myths of Electricity It takes a lot of voltage to kill someone, current alone don’t kill, it take a little voltage to push it. Electricity will take the path of least resistance Electricity takes every path to complete the circuit Electricity can cause damage on the outside with little or no wounds visible.
General Electrical Safety Requirements
All electrical work practices must comply with applicable sections of the Occupational Safety and Health Administration (OSHA), National Fire Protection Association (NFPA), Philippine Electrical Code
Qualified Person
Personnel who are familiar and experienced in the type work may work on electrical circuits and equipment.
Basic Electrical Terms
Basic Electrical Terms
V = IR, I = V/R,
R = V/I
Dangers of Electricity
Boundaries
Limited Approach Boundaries – A shock protection boundary to be crossed only by qualified persons (at a distance from a live part. Unqualified persons must not cross this boundary unless accompanied by a qualified person. Restricted Approach Boundaries – A shock protection boundary to be crossed only by qualified persons (at a distance from a live part). The boundary proximity to a shock hazard requires then use of shock protection techniques and equipment when crossed. Prohibited Approach Boundaries – A shock protection boundary to be crossed only by qualified persons (at a distance from live part). When crossed by a body part or object, this boundary requires the same protection as if direct contact is made with a live part (i.e., requires a voltage rated tools, voltage rated gloves and clothing in some cases).
Working on Electrical Equipment and System
Boundaries
Working Spaces around enclosures and Equipment
Equipment Clearance for Operations near Energized Overhead Lines Voltage Level Up to 50 kV 69 kV 115 kV 230 kV 500 kV
Distance 10 feet 11 feet 12 feet 16 feet 25 feet
Note: Use the 10-foot minimum and add 4 inches every 10 kV over 50 kV rounding up to the nearest foot. It is required because clearance is usually an estimate.
Equipment Clearance in Transit A flag person must guide cranes, high lifts and other equipment in transit near exposed energized lines at all times. o
Do not move any equipment or machinery under energized overhead high voltage lines or near exposed energized parts. o
Unload and lower any boom or mast to transport position.
o
Ground the equipment while it is being transported.
o
Voltage Level Up to 50 kV 50 kV up to 345 kV Over 345 kV up to 750 kV
Distance 4 feet 10 feet 16 Feet
Working on Electrical Equipment and System Electrical installation must comply with the applicable provisions of the current editions of PEC, OSHA and NFPA Flash hazard analysis shall be done before a person approaches any exposed electrical conductor or circuit part that has not been placed in an electrically safe working condition. Observe a safe approach distance from exposed energized electrical conductors or circuit parts. As distance between a person and the exposed energized conductors decreased, the potential for electrical accident increases.
Safety Requirement Before Starting Electrical Works
SWP Hazard Identification Job Briefing PPE requirement
