week 11 Flashcards
(20 cards)
Who should carry out electrical design and installation?
Only qualified professionals
What is required for legal electrical compliance?
Adherence to standards such as AS/NZS 3000, 3012, 3017, 3760, and 4836.
What should be considered when designing around swimming pools?
Existing overhead cables and the cost of relocating them.
What affects electrical supply arrangements?
Property distance from the network and site features like roads or waterways.
What materials are used for private poles?
CCA-treated timber or galvanized steel (not untreated timber).
What must be considered when running conduits through buildings?
Risk of impact damage, building movement, and water ingress.
What are the three key wires in a domestic electrical circuit?
Active, neutral, and earth wires.
What is the function of a circuit breaker or fuse?
To prevent overcurrent that can damage circuits.
How does a safety switch protect users?
It cuts power when current in ≠ current out (indicating leakage).
What is the recommended approach for power outlet placement?
Install many outlets during construction to avoid extension cords and fire risk.
What are the four types of water supply systems?
Cold, heated, non-drinking, and fire-fighting water services.
What defines cold water in plumbing?
0°C to 25°C.
What materials are ideal for hot and cold water supply?
Copper, PEX, PVC, and CPVC, depending on application and exposure.
What piping is ideal in marine environments
Stainless steel, due to high corrosion resistance.
What pipe material is used in high-rise sewage due to soundproofing?
Cast iron.
What is the function of traps in sewer systems
To create a water seal that prevents sewer gases from entering buildings.
What is the purpose of a gully trap?
To prevent backflow and entry of sewer gases, and avoid stormwater contamination.
What is the minimum gradient standard in sewer pipe installation?
Example standards include 1:60 or 1.6%.
What are two types of warm water supply systems
Reticulated and centralised circulatory systems.
What are six strategies for stormwater management?
Use rainwater tanks, retain vegetation, minimise impervious surfaces, reduce land disturbance, and direct runoff to vegetated areas.
