Iran Nezam Electrical Supervision Exam case studies
Iran Nezam Electrical Supervision Exam · Put your knowledge to work in context.
The Iran Nezam Electrical Supervision Exam - often called آزمون نظام مهندسی برق or the electrical engineering licensure exam of the Construction Engineering Organization (Nezam-e Mohandesi) - is the gate that lets an electrical engineer sign and supervise building electrical work in Iran. It is aimed at graduates who already hold an electrical engineering degree and now need professional standing to take responsibility for design and supervision of building installations. The Iran Nezam Electrical Supervision Exam case studies are 5 cases and about 2,890 words.
1Residential Tower Main Feeder: Demand Factor Versus Derated Ampacity
A 12-storey residential tower in Karaj has 48 identical units, each with an 8 kW connected load (including a 3 kW instantaneous water heater and a 2.5 kW split AC). The consultant's panel schedule totals 384 kW and applies a 0.45 demand factor, giving 172.8 kW.
611 words, about 3 min2Bakery Subpanel: Conduit Fill Is Not the Only Limit
A bakery expansion adds a 400 V subpanel 25 m from the main board. The contractor proposes one 40 mm rigid PVC conduit carrying six single-phase 16 A circuits (each 2.5 mm² Cu PVC, L+N) and one 3-phase 20 A circuit (3×2.5 mm² + N), with a single 2.5 mm² PE.
593 words, about 3 min3Rural Pump Station on a TT System with Cascaded RCDs
A rural water-pumping station is supplied by a 400 V, 3-phase, 15 kW submersible pump at the end of a 300 m overhead line. The installation is TT because the utility supplies no PE; the pump control panel has a local earth electrode measured at 45 Ω.
582 words, about 3 min4Office Emergency Lighting on Switched Local Circuits
A 9-storey office building has a new emergency lighting system using self-contained LED luminaires with 1-hour integral batteries. The contractor has taken the unswitched supply for each corridor luminaire from the load side of the corridor lighting switch, so the batteries charge only when the corridor lights are on.
573 words, about 3 min5Progress Payment Pressure and Concealed Nonconforming Work
You are the licensed electrical supervisor for a 6,000 m² mixed-use building in Isfahan. During a site visit you find that the contractor has installed 2.5 mm² Cu on twelve 20 A dedicated socket circuits because 4 mm² cable was unavailable; the measured load on each circuit is 13 A.
531 words, about 3 min