Abstract
The study investigated the techniques required for enh0ancing effective earthing in electrical domestic
installation among graduates of Technical College in Imo state, Nigeria. Three research questions
coupled with one hypothesis were answered by the study. Descriptive survey design was used to
carry out the research in Owerri Education zone of Imo State. The population of the study was
comprised of 29 Polytechnic Electrical Technology lecturers from the zone and 61 electrical workers
(Technologist Technicians and Craftsmen) with Owerri Zone Enugu Electricity Distribution
Company(EEDC) formerly PHCN. There was no sampling, intact population was used. The
questionnaire was designed by researchers tagged „Effective Earthing Techniques in Domestic
Electrical Installation(EETDEI) was used for data collection with 22 items questionnaire, validated by
three experts and also pilot tested outside the research zone. Cronbach alpha was used to establish
the internal consistency of the instruments which yields 0.87. The questionnaire was administered
and 87 copies of the questionnaire were returned. Mean and Standard deviation were used in
analyzing the research questions while null hypothesis was tested at 0.05 level of significance using
Z-test. Results of the study revealed that 7 items earthing points/parts and materials, 8 items
method/process of earthing and 7 items test modalities were identified as the needed earthing
techniques for effective electrical domestic installation and there was also no significant difference
between EEDC electrical workers and Electrical Technology lecturers on the required effective
techniques for enhancing earthing in domestic installation. Consequently, it was recommended that
using real building is required for teaching student earthing practically and not board practice, enough
time should be given to students for practice and a set of earthing tests must be carried out on a new
installation with test instrument.
Keywords: TVET, Earthing, Electrical Installation, Testing.
Publication Date: 2018-12-06