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Questions and Answers
Which of the following installations is explicitly covered under PEC 2009?
What does the term 'accessible' refer to in terms of equipment according to PEC 2009?
Regarding the definitions, what does 'readily accessible' imply?
Which of the following structures is NOT covered under the PEC 2009?
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Which type of facility is specifically mentioned as NOT being covered by the PEC 2009?
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What is the primary purpose of a Ground-Fault Circuit Interrupter (GFCI)?
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Which term describes a device that allows the conductors of a circuit to be disconnected from their power source?
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What does the term 'Duty, Continuous' refer to?
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How is 'Dusttight' defined in the context of electrical enclosures?
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What is meant by 'Duty, Intermittent'?
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Study Notes
Coverage of PEC 2009
- Installation of electrical conductors, equipment, raceways, signaling, communication conductors, and optical fiber cables is included.
- Public and private buildings such as residential, commercial, industrial, and agricultural structures need safeguarding against electrical hazards.
- Covers electric generating plants, industrial plants, transformer stations, quarries, watercraft, and airfields.
- Additional facilities covered include railways switchyards, dockyards, shopping parks, and mobile homes.
- Exclusions include railway rolling stock, aircraft, automotive vehicles, and railways solely for rolling stock operation.
Definitions and Key Terms
- Accessible: Allows close approach without barriers.
- Disconnecting Means: Device that disconnects circuit conductors from the power supply.
- Ground-Fault Circuit Interrupter (GFCI): Protects personnel by de-energizing circuits when ground current exceeds set values.
- Raceway: Enclosed channel for holding wires or cables, with several types including RMC, EMT, and surface raceways.
- Receptacle: Contact device for attaching plugs at an outlet; can be single or multiple.
Electrical Installation Requirements
- Criteria for Inspection: Focus on suitability, mechanical strength, wire bending space, electrical insulation, and heating effects from normal and abnormal use.
- Entrance to Working Space: Large equipment (≥1200 amperes) must have at least one entrance of specified width and height.
- Headroom Requirement: Minimum headroom around service equipment and switchboards is 2000 mm.
- Safety Signage: Warning for voltages exceeding 600 volts requires the sign "DANGER - HIGH VOLTAGE - KEEP OUT."
- Manhole Access Measurements: Rectangular openings should measure 650 mm x 550 mm; round openings should be 650 mm in diameter.
Installation Documentation
- Substation plans must include certain items, with outdoor installations requiring details of fence and supporting structures instead of walls and a roof.
- Installation documentation should also include specifications of equipment, one-line diagrams, and computations on wire sizes and insulation classes.
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Description
This quiz covers fundamental concepts in Electrical Engineering, focusing on large-scale electrical systems, power transmission, and motor control. Test your knowledge on the critical aspects that define this field and its applications in real-world scenarios.
