The expected answers were:
(a)(i) Trunking is a fabricated rectangular casing with a removable lid which allows the conductors to be laid in
OR
Trunking is a system in which a bunch of cables are placed in a rectangular long run boxes with cover lids.
(i) Types of trunking
Tap-on trunking
Floor trunking
Busbar trunking
Concrete trunking
Plain-section trunking
Skirting trunking
Bench trunking
Compactmented trunking
- Purpose is to ensure that:
- All single-pole switches are connected to the live conductor.
- Live conductor to live terminal of socket, neutral terminal and earth to earth terminal of socket outlet.
- Fuses protection are always on the live conductor.
- Types of commonly used conduit
Light gauge steel conduit
Heavy gauge steel conduit
Aluminium conduit
Copper conduit
Flexible conduit
The question was on Electrical Wiring. The question was unpopular. The performance was fairly good.
Many candidates could not define trucking. Only a few listed trucking types and the purpose of polarity test in an installation. Majority of the candidates could not list two types of commonly used metal conduit.
