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Q1 – List 5 requirements of a good conductor. You must ensure that:
Q2 – What do you understand by a conductor?
Q3 – Name ONE important fact about a good electrical joint.
Q4 – What type of joining method will be used for joining flexible conductors and cables?
Q5 – For what type of application is bimetallic ferrules used?
Q6 – Give Three examples of good conductors.
Q7 – Explain why XPLE is such a good insulator
Q8 – Name THREE uses of magnesium oxide
Q9 – Briefly explain the purpose of an insulator
Q10 – Porcelain insulators are covered with a smooth glaze. Why?
Q11 – Glass is a very popular insulator. Explain why
Q12 – Name the colours used in a three-core, flexible type domestic cord and state to which terminals they must be connected
Q13 – Make a neat, labelled sketch of a PVC-insulated, wire armoured cable.
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Q14 – Explain the function of the following
b) Wire armouring
Q15 – Are cross linked polyethylene-insulated cables suitable for high voltages?
Q16 – Without referring to the actual joints of the conductors, name THREE requirements of a good joint in an armored cable
Q17 – Name the basic steps to be followed when making a cable joint
Q18 – Name three advantages of installing cables in ducts
Q19 – What does SANS 10142 stipulate with regard to the maximum permissible voltage drop in an installation?
Q20 – Name FOUR disadvantages of buried cables.
Q21 – What does SANS 10142 stipulate with regarding to the jointing of flexible cables?
Q22 – Name THREE functions of the resin used in a high-voltage resin joint.