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WorksheetsAMIN Electrical Conduit Systems Quiz
Total questions: 10
Worksheet time: 5mins
What are the three main types of supply?
TN-S
TT
TN-C-S
TN-R
What are the advantages of conduit systems?
Cannot be used as the circuit protective conductor
Increases fire risks
Affords conductors good mechanical protection
Requires frequent rewiring
What are the typical sizes of steel conduit?
10mm, 15mm, 20mm, 25mm
18mm, 22mm, 28mm, 36mm
16mm, 20mm, 25mm, 32mm
30mm, 35mm, 40mm, 45mm
What is the disadvantage of PVC conduit systems?
Minimal condensation due to low thermal conductivity in walls
Does not require painting
Light in weight and easy to handle
Affected by temperature and oils
What is the typical size of PVC conduit for the given cables?
32mm
16mm
20mm
25mm
What is the total cable factors for the given cables in Example 1?
172
120
336
442
What is the size of conduit required for the given cables in Example 2?
20mm
25mm
30mm
35mm
What type of PVC conduit is suitable for pre-cast and in situ concrete work?
Light Gauge Super High Impact
Heavy Gauge Standard Impact
Heavy Gauge High Temperature Material
Heavy Gauge Super High Impact
What is the disadvantage of steel conduit systems?
Does not require bending or clipping of cables
Minimal condensation due to low thermal conductivity in walls
Requires frequent painting
Care must be taken when gluing joints to avoid forming a barrier across the inside of the conduit
What type of finish is suitable for steel conduit in situations where steam or dampness is present?
Galvanised
Black enamelled
Polished
Rustic
