NICET EPT case studies
NICET EPT · Put your knowledge to work in context.
The NICET Electrical Power Testing (EPT) certification is a professional credential for technicians who test, inspect, and commission electrical power systems and the equipment that supports them. NICET offers EPT exams at three levels - I, II, and III - so a person can enter the program early in a field career and progress to senior responsibility as experience and judgement grow. The NICET EPT case studies are 5 cases and about 3,831 words.
1Racking a Starter Bucket Under a Stale Arc-Flash Label
You are the EPT technician at a 480Y/277 V MCC lineup fed from a 2000 kVA transformer. The arc-flash study labels the main breaker line side at 18 cal/cm² at an 18-inch working distance, with a 6 ft arc-flash boundary.
658 words, about 3 min2Commissioning a 1500 kVA Dry-Type Transformer With Two Anomalies
You are commissioning a 1500 kVA dry-type transformer, 13,800 V delta primary to 480Y/277 V secondary, installed as a separately derived system feeding a 4000 A switchboard. The secondary is carried in five sets of 500 kcmil copper per phase.
740 words, about 4 min3Motor Trips on Every Start After a Rewind
A 500 hp, 4160 V, 4-pole, 60 Hz TEFC induction motor drives a boiler feedwater pump through a coupling. Nameplate: 63 A FLA, 6.0× locked-rotor current, thermal limit 60 seconds at locked rotor from a cold start.
819 words, about 4 min4Acceptance Testing a 15 kV XLPE Feeder With a New Splice
A 15 kV, 900 ft feeder of 500 kcmil copper XLPE cable with 133% insulation, one new heat-shrink splice, and two new terminations is ready for acceptance testing. The project specification, written in 1985, requires a DC hi-potential test at 35 kV for 15 minutes.
816 words, about 4 min5False Ground Trip Caused by CT Saturation on a 13.8 kV Feeder
A 13.8 kV feeder is protected by a microprocessor relay using 600:5 multi-ratio CTs rated C100. The measured secondary loop resistance, including the CT winding, leads, and relay, is 1.3 Ω.
798 words, about 4 min