Electrical safety

To prevent electrical shock, electrocution, and arc flash hazards, consider these safety procedures and regulations:

1. Hazard Identification and Risk Assessment:

• Identify potential arc flash hazards and assess the likelihood and severity of potential injuries. Key factors include equipment design, overcurrent protection, operating time, and maintenance effectiveness LLMCitation(cited_text_snippet="An arc flash risk assessment should be done to:

• identify arc flash hazards

• determine the likelihood of an arc flash, and the injuries it may cause

• determine the severity of the injuries

• determine what protective measures are needed, including personal protective equipment (PPE)", source_document_reference_number=6).

2. De-energize Equipment:

• Whenever possible, do not work on energized equipment. Follow lockout/tagout procedures as part of a hazardous energy control program LLMCitation(cited_text_snippet="Whenever possible, do not work on energized equipment. Always follow lockout/tagout procedures as part of a hazardous energy control program.", source_document_reference_number=1).

3. Safe Work Practices:

• Ensure conductors and circuit parts are in safe working condition LLMCitation(cited_text_snippet="Making sure conductors and circuit parts are in a safe working condition", source_document_reference_number=1).
• Use non-sparking tools LLMCitation(cited_text_snippet="Using non-sparking tools", source_document_reference_number=1).
• Implement work permits, safe work procedures, and job planning LLMCitation(cited_text_snippet="Implementing work permits, safe work procedures, and job planning", source_document_reference_number=1).
• Post signs alerting of the hazards LLMCitation(cited_text_snippet="Posting signs alerting of the hazards", source_document_reference_number=1).

4. Approach Boundaries:

• Use arc flash approach boundaries, including barricades LLMCitation(cited_text_snippet="Using arc flash approach boundaries, including barricades", source_document_reference_number=1).
• Increase working distance from energized parts LLMCitation(cited_text_snippet="Increasing the working distance", source_document_reference_number=1).
• Unqualified workers should maintain a safe distance from exposed energized conductors and should not enter the arc flash boundary without proper PPE and supervision from a qualified person LLMCitation(cited_text_snippet="For example, unqualified workers should remain a distance away from the exposed energized conductors or circuit parts (including any equipment or objects they may handle). They should not cross into the arc flash boundary unless they are wearing appropriate PPE and are supervised by a qualified person.", source_document_reference_number=3).

5. Personal Protective Equipment (PPE):

• Wear appropriate shock and arc flash PPE LLMCitation(cited_text_snippet="Wearing shock and arc flash personal protective equipment (PPE)", source_document_reference_number=1).
• Ensure workers know how to select, use, and care for PPE and understand its limitations LLMCitation(cited_text_snippet="Workers must know how to select, use, and care for the necessary PPE, and understand the limitations of the PPE.", source_document_reference_number=3).
• Use either the incident energy analysis method or the arc flash PPE category method to determine the required PPE for a specific job LLMCitation(cited_text_snippet="The CSA standard Z462:21 \"Workplace Electrical Safety\" provides two methods that can be used to determine what type of PPE is required for a specific job:

1. The incident energy analysis 2. The arc flash PPE category", source_document_reference_number=3).

6. Preventive Maintenance:

• Regularly inspect for wear and tear of insulation, corrosion, poor connections, and excessive moisture LLMCitation(cited_text_snippet="Regular inspection for wear and tear of insulation, corrosion, poor connections, overheated electrical conductors, excessive pitting of contacts, or excessive moisture, water, or ice on the equipment.", source_document_reference_number=1).
• Routinely inspect circuit breakers and relays based on manufacturer's or NETA guidelines LLMCitation(cited_text_snippet="Routine inspections of circuit breakers and relays (develop a testing schedule based on the manufacturer's instructions or the InterNational Electrical Testing Association (NETA) guidelines).", source_document_reference_number=1).
• Keep electrical drawings current LLMCitation(cited_text_snippet="Keep electrical drawings current.", source_document_reference_number=1).

7. General Safety Tips:

• Inspect electrical equipment before each use and repair or replace damaged equipment immediately LLMCitation(cited_text_snippet="Inspect portable cord-and-plug connected equipment, extension cords, power bars, charging stations, and electrical fittings for damage or wear before each use. Repair or replace damaged equipment immediately.", source_document_reference_number=20).
• Use extension cords and equipment that are rated for the level of amperage or wattage being used LLMCitation(cited_text_snippet="Use extension cords or equipment that is rated for the level of amperage or wattage that you are using.", source_document_reference_number=20).
• Always use the correct size fuse. Replacing a fuse with one of a larger size can cause excessive currents in the wiring and possibly start a fire LLMCitation(cited_text_snippet="Always use the correct size fuse. Replacing a fuse with one of a larger size can cause excessive currents in the wiring and possibly start a fire.", source_document_reference_number=20).

8. Approach Distances:

• Maintain a safe clearance from electrical lines, ensuring a minimum approach distance of 10 ft (3m) for lines carrying up to 50,000 volts LLMCitation(cited_text_snippet="Maintain a clearance of at least 10 ft. (3m) between any part of the machine and its occupants, their tools, and their equipment from any electrical line or apparatus carrying up to 50,000 volts.", source_document_reference_number=7).

9. Arc Flash Boundaries:

• Understand and respect arc flash boundaries, which define the distances at which a person without PPE may receive a second-degree burn LLMCitation(cited_text_snippet="An arc flash boundary is the term used to describe the distance at which a person without personal protective equipment (PPE) may get a second-degree burn if an arc flash occurs.", source_document_reference_number=8).

10. Estimating Heat Energy:

• Estimate the heat energy an employee could be exposed to if an arc occurs, using methods such as those described in NFPA 70E-2012, Annex D or IEEE Std 1584b-2011 LLMCitation(cited_text_snippet="Paragraph (g) (2) of § 1926.960 provides that, for each employee exposed to an electric-arc hazard, the employer must make a reasonable estimate of the heat energy to which the employee would be exposed if an arc occurs. Table 2 lists various methods of calculating values of available heat energy from an electric circuit.", source_document_reference_number=18).

11. Standards and Regulations:

• Comply with relevant standards and regulations such as CSA Z462, NFPA 70E, and other jurisdictional requirements LLMCitation(cited_text_snippet="Standards such as the following provide information about establishing a maintenance program and other aspects of electrical safety in the workplace.

• Canadian Standards Association (CSA) Z463 \"Maintenance of Electrical systems\"

• CSA Z462 \"Workplace Electrical Safety\"

• National Fire Protection Association (NFPA) 70B \"Recommended Practice for Electrical Equipment Maintenance\"

• NFPA 70E \"Standard for Electrical Safety in the Workplace\"

• American National Standards Institute ANSI/NETA MTS \"Standard for Maintenance Testing Specifications for Electrical Power Equipment and Systems\"", source_document_reference_number=2).

By adhering to these procedures and regulations, the risks of electrical shock, electrocution, and arc flash hazards can be significantly reduced.