Lesson 2: Electrical Saftey

Order boundary types from most exposed to danger to least

restricted boundary, limited approach boundary, arc flash boundary

  ?   is the process of removing the source of electrical power and installing a lock that prevents the power from being turned on.

Lockout

Which of the following are two areas that require attention when working safely with electric motors?

I. Electrical circuit
II. Guard or Housing
III. Pump
IV. Pump Motor
V. Rotating Shaft

1 and 5

According to NFPA 70E, in the process for verifying an electrical safe work condition, what step is identified as “determine all possible sources of electrical supply to the specific equipment. Check applicable up-to-date drawings, diagrams, and Identification tags”?

Step 1

According to OSHA's standard procedure for equipment lockout/tagout, what step is identified as “Release stored energy”?

Step 5

According to NFPA 70E, in the process for verifying an electrical safe work condition, what step is identified as “Release stored electrical energy”?

Step 4

According to OSHA's standard procedure for equipment lockout/tagout, what step is identified as “Shut down machinery or equipment”?

Step 2

Which of the following are two organizations that are leading contributors to electrical safety? (Choose all that apply.)

National Fire Protection Association (NFPA)

Occupational Safety and Health Administration (OSHA)

True or False? To reduce the chance of electrical shock, it's important to always ensure that portable electrical tools are in safe operating condition and contain a third wire on the plug for grounding.

True

Safety rules that apply to commercial industrial installations for motor control include the following:

I. Never comply with the NEC, state, and local codes.
II. Use UL-listed equipment, components, and test equipment.
III. Before removing any fuse from a circuit, be sure the switch for the circuit is open or disconnected and properly verify that the circuit is de-energized.
IV. Always use safety equipment.

2 3 and 4

Which safety label indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury?

Warning

The   ?   is the distance from an exposed energized conductor or circuit part where an increased risk of electric shock exists due to the close proximity of the person to the energized conductor or circuit parts.

restricted approach boundary

OSHA procedure in order according to the standard procedure for lockout/tagout.

1. [Prepare for machinery shutdown.]

2. [Shut down machinery or equipment.]

3. [Isolate machinery or equipment]

4. [Apply lockout or tagout.]

5. [Release stored energy.]

6. [Verify isolation.]

Safety rules that apply to commercial industrial installations for motor control include the following.
I. Never comply with the NEC state, and local codes.

II. Use UL listed equipment, components, and test equipment.

III. Before removing any fuse from a circuit, be sure the switch for the circuit is open or disconnected and properly verify that the circuit is de-energized.

IV. Never use safety equipment.

2 and 3

A qualified person informs other electricians and maintenance personnel of tasks being performed and maintains all required records.

True

Which of the following organizations are identified as sponsors in developing the NEC and NFPA 70E?

I. International Brotherhood of Electrical Workers (IBEW)
II. International Electrotechnical Commission (IEC)
III. National Electrical Manufacturers Association (NEMA)
IV. National Fire Protection Association (NFPA)

IV. only