As a substation apprentice, you work at an electrical substation while training under the direct supervision of a journey-level substation technician. Your duties typically involve the installation and maintenance of electrical wiring and substation equipment. During an apprentice program, you also learn other aspects of substation construction, such as installing fencing and testing circuit breakers, switches, and metering equipment. Depending on the details of the apprenticeship, your responsibilities include attending classes during or after regular working hours or responding to emergency calls or outage reports with your training technician.