LOTO Flashcards
What are the 3 types of LOTO locks and how are they different?
Personal Lock
- Blue plastic
Control Lock
- Red plastic
Blue metal lock
Who is the only person who can remove another person’s lock?
The Energy Control Coordinator (ECC) after contacting the absent person.
From slide:
Absent person lock removal.
Responsibilities of the person in charge.
– Contact the absent person excellent
– If unable, contact the ECC and site\construction manager
– only the ECC can remove another person’s lock 
What are the requirements of an electrically safe work condition?
1) Deenergize:
- Determine all sources of supply (electricity) into the boundary,
- Interrupt the load current (E-stop)
- Disconnect the equipment = switch off by opening appropriate isolation devices from all possible sources
- Visually verify
2) Apply Lockout-Tagout & Secure the area, not only the circuit
3) Verify absence of voltage:
Test that the circuit is actually deenergized and make sure it will remain like that
4) Ground: If greater than 1,000 V
What is the order for disconnecting wires n an AC circuit?
Phase
Neutral
Earth (if needed)
Work above what cal/cm2 is not allowed.
Above 40 cal/cm2 because blast force is too strong and class 4 PPE is not adequate enough.
What is the number for the OSHA standard for electrical work?
1910.147
What circuit breakers do you need to open to isolate the yaw system on a S97?
1) 11F1 Main Yaw Supply
2) 101F1 Main 24V Supply
What LOTO isolation do you use for the “Hydraulic Station”?
Lock Open:
1) Lock open 82F1 Hydraulic Pump
2) Lock open 108F3 Hydraulic Valves
3) Tagged closed hydraulic break station
What are the 8 NEW “Life Saving Rules”?
- Work authorization
- Driving
- Confined Space
- Mechanical Lifting Operations
- Working at Heights
- Safety controls
- Energy Isolation
- Line of fire
Disconnecting Wires Order
1) Phase
2) Neutral
3) Earth/ Ground (if needed)
Describe the Three Point Test Method
Test / Hot - Test on a known voltage
Verify / Cold - Each phase to ground & phase to phase
Test / Hot - Test again n a known voltage
Can test for continuity: lead to lead, open line, lead to lead
Describe the “line side” and “load side”
Line side = supply of energy
Load Side = Device side using energy (Ex: motor)
When must appropriate PPE be put on?
Limited Approach Boundary (Shock or Arc Flash Boundaries)
Until electrically safe work conditions are met
When is Class 2 Arc Rated clothing required and what does it include?
1.2 Cal/cm2 to 8.0 Cal/cm2
Clothes (boots, pants, long shirt, safety glasses, helmet) rated to 8 Cal/cm2 + Hearing protection + Arc rated face shield
When is Class 4 Arc Rated clothing required and what does it include?
> 8 Cal/cm2
When arc flash energy is expected > 8 Cal/cm2
