Question 3
- Define the following terms:
- Current rating;
- Fusing current;
- Fusing factor.
- State two methods of:
- Wiring;
- Earthing.
Observation
The expected answers were;
- Definition of Terms:
(i) Current rating: This is the maximum current that a load will carry indefinitely without undue deterioration.
(ii) Fusing current: This is the current at which the fuse blows or the fuse element melts.
(iii) Fusing factor: This is the ratio of the fusing current to the current rating of the fuse.
- (i) Methods of Wiring
- Surface
- Conduit
- Trunking
- Ducting
(ii) Methods of earthing
- Rod
- Mesh
- Plate
- Pipe
- Mat
Many of the candidates who attempted this question did well by defining the terms required and stated the methods of wiring and earthing.