Questions and Answers
What is the first step in risk assessment for earthing?
TAFESAFE / Job Safety Analysis
Safety glasses can be tinted in the workshop.
False
What must the main earth or bond not be connected to?
Service Neutral Link
What should cables run in where practicable?
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What should be done to stranded cables if there is a chance of strands separating?
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What type of earthing terminal/connection/bar should be used?
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What is the required size of the Main Earth?
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What size is the Water pipe bond?
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What color should the Main Earth be?
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What is the size PEC for switchboard surround if protected?
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Study Notes
Risk Management and Safety
- Conduct a Risk Assessment using TAFESAFE and Job Safety Analysis before starting any work.
- Strict adherence to behavior and safety protocols is essential in a workshop setting.
- Personal protective equipment (PPE) requirements include safety glasses and enclosed shoes; tinted safety glasses are prohibited.
Isolation and Planning
- Follow the Correct Isolation Procedure which goes beyond merely locking off.
- Develop a wiring diagram indicating general cable routes and sizes.
- Ensure the main earth is not connected to the Service Neutral Link, complying with section 17.7.
Cable Routing and Management
- Plan actual cable routes effectively:
- Ensure the switchboard panel can be opened completely as per section 2.10.6.
- Secure cables to moving panels to prevent damage, following section 2.10.6 b.
- Utilize a single wiring loom for cables wherever feasible.
Connection Standards
- Stranded cables must be twisted if there is a risk of separation, following standard 3.7.2.5.
- Ensure connections are tight and secure according to 3.7.2.3.1.
Earthing Connections
- Refer to section 5.3.4 for specifications on earthing terminal/connection/bar requirements.
- For Protected Enclosure Conductors (PEC) surrounding switchboards, follow T5.1; if unprotected, refer to 5.5.3.5, reverting back to T5.1 if exceptions are noted.
Main Earth Standards
- For Main Earth requirements, see section 5.3.3.2 and T5.1 for size specifications.
- The Main Earth must be connected back to the main earth connection, adhering to 5.5.1.1.
Bonding Requirements
- Water pipe bond sizing should follow section 5.6.3.2 guidelines, ensuring it connects back to the main earth connection or any point on the main earth as per 5.6.2.2.
- Reinforcement bond size is also specified in section 5.6.3.2 and may connect to any part of the earthing system in accordance with 5.6.2.5.
Additional Considerations
- Refer to Table 5.1 and 5.3.3.4 for PEC sizing related to Final Supply Connections (FSC’s).
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Description
This quiz covers essential safety practices and procedures related to M.E.N. earthing. It includes risk assessments, behavior in workshops, safety equipment requirements, and proper isolation procedures. Test your knowledge on planning and executing safe electrical jobs.
