The first place to visit to insure proper electrical safety is where your power source comes into your site.
Are the overhead power lines near the boom truck loading area? Does the mantenace area have any electrical lines overhead.
Are the overhead power lines near the aggregate storage area where a dump trailer may come in contact with them if driver fails to lower trailer ?
Are the telephone poles guarded or protected from being hit by trucks or forklifts?
Are the underground service conduits properly identified and protected from being dug up?
SIGNAGE CAN PREVENT ACCIDENTS DANGER HIGH VOLTAGE OVERHEAD
Electrical Panel Board
Electrical Panel Board should be neat and orderly
The area 36” in front of panel board area must be kept clear.
Lockout/Tag out procedure manual
Electrical Enclosures shall be properly labeled. OSHA 1910.33
The equipment or machine identified.
The energy and magnitude i.e.. 240 volts Three Phase
Lock out location and procedure.
Material Handling Elec. Panels
Circuit Breaker Labeling
Circuit breaker identification labeled both on exterior and inside breaker panel door
Must only be performed by trained personnel
Must provide the proper protective equipment
Must have adequate knowledge of electrical circuits and diagrams.
Must only be performed in a de-energized state, unless deemed impossible to isolate the electrical hazard. Then troubleshooting must be performed with proper ARC Suit and equipment.
The ARC Suit
Must find proper arc suit size to fit the “Troubleshooter”
Flame Retardant Suit
Rubber Gloves w/ protective leathers
Proper electrical rubber tipped tools
Testing Line Voltage
Must have protective arc suit on with face shield and rubber gloves
VOLTAGE comes in on TOP of disconnect switch , this is called the LINE
Must check voltage across all three legs 1-2, 2-3, 1-3
Testing Load Voltage
The LOAD side is on the bottom of Disconnect Switch below the fuses.
This is the electrical connection to the equipment.
When checking fuses always REMOVE from disconnect switch then check for continuity with tester. NO VOLTAGE PRESENT
Arc Shield on Disconnect
Plastic Arc Shield that we special order for all our electrical disconnects
Purpose: This procedure establishes the minimum requirements for the lockout of energy isolating devices whenever maintenance or servicing is done on machines or equipment.
It shall be used to ensure that the machine or equipment is stopped, isolated from all potentially hazardous energy sources and is locked out before employees perform any service or maintenance where the unexpected energiation or start-up of the machinery or release of stored energy could cause injury or death.
Three most important issues to address:
What type of energy needs to be controlled.
Electrical, Hydraulic, pneumatic, fluids, etc
What method and sequence of energy isolation is to take place to insure employee safety.
Lockout Disconnect, shut off air valve, close hydraulic valve and lock out etc.
3) Proper training and compliance to this program
Lockout/Tag out Station
Locks and keys are color coded
ONLY one key per lock
One key opens One lock
Hang lock and hasp at disconnects that are remote
I Like Signs & Labels !
All outlets are 20 amp 120 volt GFI protected
Space electrical outlets to minimize use of extension cords. This minimizes the need for extension cords.
Place electrical outlets near manufacturing equipment for access to power during maintenance.
Use cord reels, this keeps the cords from getting cut and damaged during storage.
Inspect extension cords for cuts, frays and missing grounding prongs.
Hand & Power Tool Safety
Visually inspect all electrical tools before use. Remove from service any tool with frayed cords, missing ground prongs, or cracked tool casings.
Use only double insulated tools
Avoid standing in wet areas when using portable electrical power tools.