Proper Use of Extension Cords - PowerPoint PPT Presentation
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Cord Inspection. All mechanical equipment deteriorates with use over time. ... Cord Inspections (cont. ... Inspect the cord & plug. ... – PowerPoint PPT presentation
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Title: Proper Use of Extension Cords
1
Proper Use ofExtension Cords
- Proper Use and
- Electrical Hazard Awareness
- for Extension Cord Users
- Module 2
2
Purpose
- The Purpose Improve your safety on and off the
Job - Raise your awareness of extension cord hazards
- Help you learn to recognize extension cord
hazards - Help you learn what actions to take when you find
these hazards - Help you understand the limitations of extension
cords - Help you realize the
importance of an Electrical
SME to your project
3
Electrocution Can Happen To You
- A small amount of electrical current can cause
injury, even death - The current from a 7.5-watt, 120-volt lamp,
passing across the chest, is enough to cause
fatal electrocution - Deaths from 120 volts represent about 12 percent
of all electrocutions - Virtually everyone uses electricity every day
- More exposure more opportunity for accidents
- 2/3 of electrical incidents involve
non-electrical workers
4
Electrocution Can Happen To You (cont.)
- Electrocution continues to rank as the fourth
highest cause of industrial fatalities (behind
traffic, violence and construction incidents) - One person is electrocuted in the home every 36
hours - One person is electrocuted in the workplace every
24 hours
5
Cord Inspection
- All mechanical equipment deteriorates with use
over time. - The prevalence of electrical equipment in the
workplace, and at home, presents more exposure to
potentially damaged or defective equipment that
can be lethal. Always take a minute or two to
examine power cords and plugs before using them.
Even a small nick in the insulation can be deadly.
6
Cord Inspections (cont.)
- Extension
Cords are a great way to extend a power
supply however they can be dangerous - Power Cord Safety Basics (applies to all power
cords, including extension cords) - Inspect the cord plug. Look for cracks or
damaged insulation, loose or missing plug blades,
and indications of overheating or burning,
especially on the plug. - Make sure the plug is securely attached to cable.
The plug should be molded to the cord or have a
clamping mechanism that fits snugly around the
cord without pinching. - Check for hot or discolored outlet wall plates.
That may indicate dangerous heat buildup at the
connections.
7
Cord Inspections (cont.)
- Power Cord Safety Basics (cont.)
- Make sure your hands are dry before plugging or
unplugging a power cord. - Make sure the plug fits snugly into the outlet.
Outlets that have loose-fitting plugs can
overheat and damage the cord and the plug. - Never force a plug into an outlet if it doesnt
fit. - Keep slack in flexible cords to prevent tension
on electrical terminals. - Grasp the plug, not the cord, when removing a
plug from an outlet.
8
Actions for damage or defective equipment
- Dont use any electrical equipment that you
suspect may be damaged - Be suspicious if any tool, cord, or other
electric equipment appears to be damaged. - If in doubt, have it checked out by a qualified
person. They will remove the equipment from
service or verify that the equipment is safe to
connect to power and use. - If the equipment may be energized.
- Isolate the area to alert personnel and keep them
clear of the potential hazard and notify your
supervisor immediately. - Dont touch or handle damaged electrical
equipment.
9
GFCI Protection
- Extension
cords may be plugged into cord
connected ground-fault circuit interrupters
(GFCI) if the permanently attached cord on the
GFCI device is less than six feet in length. - Permanently installed GFCI receptacles and
circuit breakers shall be tested monthly or
within the previous 30 days before use. Portable
GFCI devices shall be tested before each use. - If you suspect a problem, have it checked out by
a qualified person. They will remove the
equipment from service or verify that the
equipment is safe to connect to power and use.
10
GFCI Protection
- GFCI protection for personnel shall be used
- When portable electric tools and equipment are
used with temporary wiring methods or extension
cord sets for construction, repair, maintenance,
remodeling and similar activities. - When electric equipment is used in highly
conductive work locations (with water or other
conductive liquids) - Recommended GFCI test method
- Permanently installed GFCIs are tested Per
facility policies - Portable GFCI cord sets are tested by the user
- Visually inspect device for obvious defects and
broken parts. - Press reset button.
- Press test button and verify no voltage at
outlet. - Using a trouble light or tool
- Press reset button and verify power is restored.
11
Proper
Extension Cord use
- Read and follow all Manufactures instructions
12
Proper Extension Cord Use (cont.)
- Plan ahead and avoid difficulties
- For Jobs requiring the use of multiple extension
cords answer yes to New electrical
installation, modification or temporary wiring?
during the AJHA process - This will prompt the Electrical SME to review
your power requirements - For Jobs involving the use of CAMs and
exhausters etc. it may be undesirable to use GFCI
protection on these types of loads again during
the AJHA process answer yes to New electrical
installation, modification or temporary wiring?
13
Multi Outlet Adapters
- Adapters are those Muti-Outlet units less then 6
long. - Extension Cords with Multi-Outlet cord caps are
also a good choice for field use
14
Things to Avoid
15
Things to Avoid
16
Help With Electrical Safety Questions
- Help Available On-Line on your electrical safety
page - Contact your Electrical Safety Officer or
Electrical Safety SME concerning additional
questions you may have concerning the use of
electrical cords
17
Summary
- Always inspect before use.
- Protect yourself through the use of GFCIs.
- Ensure potential hazards are properly dealt with
- When in doubt contact an Electrical SME.
How do you make an extension cord material?
How to Make Your Own Extension Cord.
10/3 SJ-cord (length determined by you).
1 Male cord plug cap..
1 Female cord plug cap..
Screwdriver..
Wire strippers..
Knife..
Voltage tester..
How long can you make an extension cord?
If you plug two identical cords into each other, that reduces their current capacity in half and can possibly result in voltage drop and overheating. In general, extension cords should not exceed 100 feet in length. However, by plugging one extension cord into another, the maximum cord length can be easily exceeded.