Electrical Service Technician (EST)
Electrical
A course by
Toi Ohomai Institute of Technology
A part-time evening course for those already working in the electrical industry to become an Electrical Service Technician, combining theory and practical skills with a focus on safety and service of electrical appliances.
In-person study
Face-to-face learning in a physical classroom setting
It will take a total of 6 months
Core skills this course teaches
Service and install large electrical appliances
Students will learn to install and maintain large appliances such as refrigeration units, air conditioners, and three-phase equipment.
Emphasise electrical safety and compliance
Demonstrate safe working practices and understand safety protocols for the electrical industry.
Understand measurement techniques
Apply effective measurement techniques relevant to electrical service work.
What You're Signing Up For
This course is designed for people already working in the electrical industry who wish to gain the Electrical Service Technician (EST) qualification. The programme emphasises the repair, installation, and maintenance of electrical appliances up to 460 volts, both theoretically and practically. Students will be prepared for the EWRB practical assessment and theory examination, with a strong focus on safety, measurement techniques, and compliant working practices.
Course Content
- Servicing and installing large appliances, including commercial refrigeration and air conditioners
- Service, maintenance, disconnection, and reconnection of single-phase and three-phase electrical appliances (up to 460 volts)
- Safe working practices and safety protocols
- Electrical measurement techniques
- Preparation for EWRB practical assessment
- Completion of theory examination through EWRB ASPEQ
What you need to know first
Currently working in the electrical industry
Completion of a First Aid and CPR course
What sort of industry will this job lead to
Electrical Engineering
Building Services
Maintenance & Repair
Future employment opportunities might be
Electrical service technician (under supervision)
Installation and repair of a wide range of electrical appliances
Work towards full EWRB registration
Known for hands-on, industry-aligned education, Toi Ohomai focuses on giving learners real skills that lead to real outcomes. With strong employer connections, supportive teaching, and clear pathways across certificates, diplomas, and degrees, it’s a place where learning stays relevant and confidence grows over time. Courses span trades, construction, business, health, creative industries, technology, and primary industries, helping learners build experience and momentum for whatever comes next.