Questions and Answers
Which section in AS3000 provides further information on testing and verification of electrical installations?
Which section in AS3000 provides further information on earthing requirements for electrical installations?
Which Part (Section) of AS3000 provides installation practices to be followed to ensure compliance of electrical installations?
AS3000 may be applied through legislative requirements in each state and territory in Australia and used against electricians in a court of law to prove negligence and liability for non-compliant work.
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What is the term in AS3000 to describe making contact with a conductor or conductive part that is live in normal service?
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What is the term in AS3000 to describe contact with a conductive part that is not normally live but has become live under fault conditions?
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What does SELV stand for?
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The following are types of basic protection for use against direct contact. Select one or more:
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The following are types of fault protection for use against indirect contact. Select one or more:
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The statement 'shall' in AS3000 means?
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Electric current that passes through a human body or an animal body when that body touches one or more accessible parts of electrical equipment is called?
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The statement 'should' in AS3000 means?
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This device or piece of equipment is used to connect the electrical installation earthing system to the general mass of earth. Select one:
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This device or piece of equipment is used to connect the earthing system within the electrical installation to the supply neutral conductor. Select one:
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The following are types of extraneous conductive parts. Select one or more:
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An overload current is a fault condition.
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A short circuit current is a fault condition.
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What is the maximum disconnection time for a 16A final subcircuit supplying socket outlets connected to a 230V supply?
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This class of equipment uses a protective earth for accessible conductive parts as a protection measure. Select one:
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This class of equipment uses extra low voltage as a protection measure. Select one:
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This class of equipment uses double insulation as a protection measure. Select one:
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The following are ways that abnormal voltages may occur in an electrical installation. Select one or more:
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The nominal voltages and tolerances for low voltage supply systems in Australia is?
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What are the reasons for dividing electrical installations into circuits? Select one or more:
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An active conductor is NOT permitted to be any of the following colours. Select one or more:
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Study Notes
AS3000 Compliance and Sections
- Section 2 of AS3000 outlines installation practices for compliance in electrical installations.
- Section 3 provides minimum regulatory requirements for safe electrical installations.
Legal Implications
- AS3000 can be referenced in legal matters to demonstrate negligence or liability for non-compliance among electricians.
Key Terminology
- Direct Contact: Making contact with a live conductor or conductive part.
- Indirect Contact: Contact with conductive parts that are not normally live but become live under fault conditions.
- SELV: Stands for Separated Extra Low Voltage, indicating a specific electrical safety standard.
Protection Types
- Basic protection methods include insulation, barriers, enclosures, and placing equipment out of reach.
- Fault protection includes applying automatic disconnection, protecting against electrical faults.
Voltage Terms
- Touch Voltage: The voltage that can appear between accessible conductive parts.
- Low voltage is defined as greater than 50V a.c. or 120V d.c. but less than 1000V a.c. or 1500V d.c.
Electrical Safety Statements
- A statement labeled "shall" in AS3000 is mandatory.
- A statement labeled "should" is a recommendation and often is not strictly required to be followed.
Earthing and Grounding
- Earth Electrode: Connects the earthing system to the general mass of earth.
- MEN Link: Connects the earthing system to the supply neutral conductor.
- Protective Earthing Conductor: Carries earth fault currents within the electrical installation.
Equipment Classification
- Class I Equipment: Uses a protective earth for accessible conductive parts.
- Class II Equipment: Employs double insulation for protection.
- Class III Equipment: Utilizes extra low voltage as a safety measure.
Fault Conditions
- Short circuit and overload currents refer to various fault conditions in electrical installations.
- Abnormal voltages can occur from faults between circuits and associated influences within the installation.
Circuit Regulations
- The maximum disconnection time for a 16A final subcircuit connected to a 230V supply is 0.4 seconds.
- For three-phase 32 amp 230V submains, a specific disconnection time standard is set but requires understanding due to variances.
Nominal Voltage Standards
- Nominal voltages for low voltage supply systems in Australia are defined as 230/400 V with tolerances of +10% to -6%.
Electrical Installation Practices
- Dividing installations into circuits aids in danger minimization, load capacity efficiency, and safe maintenance.
- Specific colour codes for active conductors prohibit the usage of green and yellow, which signal earth or neutral connections.
Regulations on Testing
- Section 8 of AS3000 discusses testing and verification of electrical installations.
- Section 5 specifically addresses earthing requirements for installations to ensure safety and compliance.
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Description
Test your knowledge on the essential protection mechanisms for safety in electrical installations. This quiz covers critical concepts and practices essential for ensuring electrical safety. Prepare to demonstrate your understanding and application of these vital principles.
