This 24 slide presentation provides an overview of electrical safety. It describes how electricity works and how electrical current affects the body, noting that even low voltages can be dangerous. It discusses common electrical injuries like burns and involuntary muscle contractions. It emphasizes the importance of grounding, using GFCIs, avoiding contact with power lines, and only using equipment as prescribed by the manufacturer. It provides guidance on safely using flexible cords and removing damaged equipment from service. The goal is to help trainees understand electrical hazards and solutions to avoid injury.
Regards, Mr. SYED HAIDER ABBAS
MOB. +92-300-2893683 MBA in progress,NEBOSH IGC, IOSH, HSRLI, NBCS,GI,FST,FOHSW,ISO 9001, 14001,
'BS OHSAS 18001, SAI 8000, Qualified .
Regards, Mr. SYED HAIDER ABBAS
MOB. +92-300-2893683 MBA in progress,NEBOSH IGC, IOSH, HSRLI, NBCS,GI,FST,FOHSW,ISO 9001, 14001,
'BS OHSAS 18001, SAI 8000, Qualified .
CFD Simulation of By-pass Flow in a HRSG module by R&R Consult.pptxR&R Consult
CFD analysis is incredibly effective at solving mysteries and improving the performance of complex systems!
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Work done in cooperation with James Malloy and David Moelling from Tetra Engineering.
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Immunizing Image Classifiers Against Localized Adversary Attacksgerogepatton
This paper addresses the vulnerability of deep learning models, particularly convolutional neural networks
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adversary training.
Hybrid optimization of pumped hydro system and solar- Engr. Abdul-Azeez.pdffxintegritypublishin
Advancements in technology unveil a myriad of electrical and electronic breakthroughs geared towards efficiently harnessing limited resources to meet human energy demands. The optimization of hybrid solar PV panels and pumped hydro energy supply systems plays a pivotal role in utilizing natural resources effectively. This initiative not only benefits humanity but also fosters environmental sustainability. The study investigated the design optimization of these hybrid systems, focusing on understanding solar radiation patterns, identifying geographical influences on solar radiation, formulating a mathematical model for system optimization, and determining the optimal configuration of PV panels and pumped hydro storage. Through a comparative analysis approach and eight weeks of data collection, the study addressed key research questions related to solar radiation patterns and optimal system design. The findings highlighted regions with heightened solar radiation levels, showcasing substantial potential for power generation and emphasizing the system's efficiency. Optimizing system design significantly boosted power generation, promoted renewable energy utilization, and enhanced energy storage capacity. The study underscored the benefits of optimizing hybrid solar PV panels and pumped hydro energy supply systems for sustainable energy usage. Optimizing the design of solar PV panels and pumped hydro energy supply systems as examined across diverse climatic conditions in a developing country, not only enhances power generation but also improves the integration of renewable energy sources and boosts energy storage capacities, particularly beneficial for less economically prosperous regions. Additionally, the study provides valuable insights for advancing energy research in economically viable areas. Recommendations included conducting site-specific assessments, utilizing advanced modeling tools, implementing regular maintenance protocols, and enhancing communication among system components.
Explore the innovative world of trenchless pipe repair with our comprehensive guide, "The Benefits and Techniques of Trenchless Pipe Repair." This document delves into the modern methods of repairing underground pipes without the need for extensive excavation, highlighting the numerous advantages and the latest techniques used in the industry.
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About
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
Technical Specifications
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
Key Features
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface
• Compatible with MAFI CCR system
• Copatiable with IDM8000 CCR
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
Application
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
1. Slide 1 (of 24)
General Electrical Safety
The OSHA e-tool electrical safety presentation
was used to create this presentation
2. Slide 2 (of 24)
Training Objectives
Describe how electricity works
Describe how shocks occur
Describe how electrical current
affects the body
Describe the most common ways
individuals are injured using
electricity
Provide solutions to avoid being
injured while using electricity
3. Slide 3 (of 24)
How Electricity Works
Current Moves from
High Voltage
To Low Voltage
Flow of Current
The same thing occurs in an Electrical Wire
Water Moves from
High Pressure
To Low Pressure
Example: A Garden Hose
4. Slide 4 (of 24)
Electricity travels in closed circuits, normally through
a conductor
Shock results when the body becomes part of the
electrical circuit
Current enters the body at one point and leaves at
another
Note: Ground circuits provide a path for stray
current to pass directly to the ground, and greatly
reduce the amount of current passing through
the body of a person in contact with a tool or
machine that has an electrical short. Properly
installed, the grounding conductor provides
protection from electric shock.
Electrical Shocks
5. Slide 5 (of 24)
How Electrical Current Affects the Body
Note: some smaller microwave ovens use 10.0 Amps (10,000 milliamps) and
common florescent lights use 1 Amp (1,000 milliamps).
Cardiac arrest, severe burns and probable death.
10
Ventricular fibrillation.
1 - 4.3
Extreme pain, respiratory arrest, severe
muscular contractions.
0.050-0.150
This is called the freezing current or "let-go" range.
0.009-0.030 (Men)
Painful shock, muscular control is lost.
0.006-0.025 (Women)
Slight shock felt; not painful but disturbing.
Average individual can let go.
0.005
Perception level. Just a faint tingle.
0.001
Human Reaction
Current (Amps)
6. Slide 6 (of 24)
Burns
Note: the graphic pictures were not included. They can be viewed online at:
http://www.osha.gov/SLTC/etools/construction/electrical_incidents/burns.html
The most common shock-related injury is a burn. Burns
suffered in electrical incidents may be one or more of the
following three types:
Electrical Burns cause tissue damage, and are the result of heat
generated by the flow of electric current through the body.
Electrical burns are one of the most serious injuries you can
receive and need to receive immediate medical attention.
High temperatures near the body produced by an electric arc or
explosion cause Arc or Flash Burns (also need prompt medical
attention).
Thermal Contact Burns occur when skin comes in contact with
overheated electric equipment, or when clothing is ignited in an
electrical incident.
7. Slide 7 (of 24)
Internal Injuries
Our bodies use small electrical currents to transmit signals
through the nervous system and contract muscles,
Extra electrical current flowing through the body can cause
serious damage.
Medical problems can include internal bleeding, tissue destruction,
and nerve or muscle damage.
Internal injuries may not be immediately apparent to the victim or
observers; however, left untreated, they can result in death.
8. Slide 8 (of 24)
Involuntary Muscle Contraction
Muscles violently contract when stimulated by excessive
amounts of electricity.
These involuntary contractions can damage muscles,
tendons, and ligaments, and may even cause broken bones.
If the victim is holding an electrocuting object, hand muscles
may contract, making it impossible to drop the object.
Note: injury or death may result from a fall due to muscle
contractions.
9. Slide 9 (of 24)
Water and Conduction
Conductors- Substances with relatively little resistance to the
flow of electrical current (e.g., metals).
Water- influences the conductive properties of some materials
Dry wood is a poor conductor
Wood saturated with water becomes a ready conductor
Use extreme caution when working with electricity where there
is water in the environment or on the skin.
10. Slide 10 (of 24)
Human Skin & Resistance
Dry Conditions Human Skin is Resistant
Current = Volts/Ohms = 120/100,000 = 1mA (0.001A)
-Barely perceptible level of current
Wet Conditions Skin’s Resistance drops dramatically
Current = Volts/Ohms = 120/1,000 = 120mA (0.12A)
-Sufficient current to cause ventricular fibrillation
A low voltage electrocution becomes much more
hazardous in a wet condition
High voltage electrical energy greatly reduces the body's resistance by
quickly breaking down human skin. Once the skin is punctured, the
lowered resistance results in massive current flow.
11. Slide 11 (of 24)
Low Voltage = Hazardous
Muscular contraction caused by stimulation does not allow
a victim to free himself from a circuit.
The degree of injury increases with the length of time the
body is in the circuit.
Thus even relatively low voltages can be extremely
dangerous.
LOW VOLTAGE
DOES NOT IMPLY
LOW HAZARD!
An exposure of 100mA for 3 seconds can cause the same amount
of damage as an exposure of 900mA for .03 seconds.
12. Slide 12 (of 24)
Ground-Faults
(The Most Common Form of Electrical Shock)
A ground-fault occurs when current flowing to the load (drill,
saw, etc.) does not return by the prescribed route.
In a simple 120 volt circuit, current travels through the black
(ungrounded) wire to the load and returns to the source
through the white (grounded) wire. If some or all of the
current does not travel back through the white wire then it
has gone somewhere else, usually to ground.
A person’s body can act as the path to ground when a fault
occurs.
13. Slide 13 (of 24)
Ground-Fault Incidents
Use GFCI’s for protection
against ground-faults
1. A double insulated drill (no
ground pin) was used in a
wet location. Water entered
the drill housing and current
flowed through the water and
user, and then back to its
source.
1. An individual with moist
hands was electrocuted
while winding up a damaged
extension cord when their
skin contacted exposed
wiring in the extension cord.
(This fatality occurred in Utah)
14. Slide 14 (of 24)
Ground-Fault Protection
The ground-fault circuit interrupter (GFCI) works by comparing the
amount of current going to and returning from equipment along the
circuit conductors. When the amount going differs from the amount
returning by approximately 5 milliamperes, the GFCI interrupts the
current within as little as 1/40 of a second.
Note: A GFCI will not protect you from line contact hazards (i.e. a
person holding two "hot" wires, a hot and a neutral wire in each
hand, or contacting an overhead power line). However, it protects
against the most common form of electrical shock hazard, the
ground-fault. It also protects against fires, overheating, and
destruction of wire insulation.
15. Slide 15 (of 24)
Ground-Fault Protection
Use ground-fault circuit interrupters (GFCIs) on all 120-
volt, single-phase, 15- and 20-ampere receptacles that
will be used to supply temporary power (i.e. hand tools
and other portable equipment).
-Portable GFCIs, like this one, are
available for situations where GFCI
protection is not otherwise provided-
Follow manufacturers'
recommended testing
procedure to insure
GFCIs are working
correctly.
Important - Plug this
end directly into the
electrical source, not
another flexible cord.
16. Slide 16 (of 24)
Grounding - How Do I Avoid Hazards
Ground all power supply
systems, electrical circuits, and
electrical equipment
Do not remove ground
pins/prongs from cord- and
plug-connected equipment or
extension cords
Use double-insulated tools
Ground all exposed metal parts
of equipment
17. Slide 17 (of 24)
Avoid Contact With Power Lines
Locate power lines in your work area before
you begin working.
Prior to digging, call “Before You Dig” at
800-227-2600(?) to have USA identify and
mark any buried lines.
Keep yourself and all objects at least 10-
feet away from all energized power lines.
Have power lines de-energized and
grounded prior to beginning your work.
Use non-conductive ladders (fiberglass)
and other tools.
18. Slide 18 (of 24)
Using Equipment in a Manner Not
Prescribed By The Manufacturer
If electrical equipment is
used in ways for which it is
not designed, you can no
longer depend on safety
features built in by the
manufacturer. This may
damage property and cause
employee injuries or worse.
Note: Junction boxes such as
this one must be mounted
properly.
Shock, fire, loss of life and property?
19. Slide 19 (of 24)
Common Examples of Equipment
Used in A Manner Not Prescribed
Using multi-receptacle boxes designed to be mounted by fitting them
with a power cord and placing them on the floor.
Fabricating extension cords with ROMEX® wire.
Using equipment outdoors that is labeled for use only in dry, indoor
locations.
Using circuit breakers or fuses with the wrong rating for over-current
protection, e.g. using a 30-amp breaker in a system with 15- or 20-
amp receptacles (protection is lost because it will not trip when the
system's load has been exceeded).
Using modified cords or tools, e.g., removing face plates, insulation,
etc.
Using cords or tools with worn insulation or exposed wires.
REMEMBER - ONLY USE EQUIPMENT IN A MANNER PRESCRIBED BY THE MANUFACTURER
20. Slide 20 (of 24)
Flexible Cords Not Used Properly
The following cords are improperly
wired directly to the electrical
circuit, are not protected by a
GFCI, and are two-wire cords that
are not grounded and not rated for
hard- or extra-hard service.
Extension type cords that are not 3-wire type, not designed for hard-usage, or
that have been modified, increase your risk of contacting electrical current, and
must not be used at CCSD.
Temporary (flexible wiring) must not be used
in place of permanent wiring. Multioutlet
surge protection such as this can be used to
supply power to equipment that needs
surge protection, but not used to provide
more outlets due to the lack of permanent
wiring.
21. Slide 21 (of 24)
Flexible Cord Safe Practices
Only use factory-assembled cord sets.
Use only extension cords that have a ground wire (3-
wire type).
Use only extension cords that are marked with a
designation code S, ST, SO, and STO for hard service,
and SJ, SJO, SJT, and SJTO for junior hard service.
Use only cords, connection devices, and fittings that
are equipped with strain relief.
Remove cords from receptacles by pulling on the
plugs, not the cords.
Remove from service flexible cords that have been
modified or damaged.
22. Slide 22 (of 24)
Remember
•Visually inspect all electrical equipment before use.
•Remove any equipment with frayed cords, missing ground
prongs, cracked tool casings, etc. from service.
•Apply a warning tag to any defective tool and do not use it
until it has been properly repaired.
23. Slide 23 (of 24)
OSHA e-Tool
OHSA's e-tool can be viewed online at:
www.osha.gov/SLTC/etools/construction/ele
ctrical_incidents/mainpage.html
24. Slide 24 (of 24)
End of General Electrical Safety
Document your Training
If you have any further questions
or want to
receive additional training on
Electrical Safety please contact
CCSD Risk Management Department at
(702) 799-2967