Maharashtra HSC Multi-Skill Electrical (NSQF) case studies
Maharashtra HSC Multi-Skill Electrical (NSQF) · Put your knowledge to work in context.
The Maharashtra HSC Multi-Skill Electrical (NSQF) is a vocational subject offered within the Higher Secondary Certificate programme of the Maharashtra State Board of Secondary and Higher Secondary Education. It combines a Class 11–12 academic qualification with industry-aligned electrical trade skills mapped to National Skills Qualification Framework levels, so learners leave school with both a board certificate and demonstrable workshop competence. The Maharashtra HSC Multi-Skill Electrical (NSQF) case studies are 5 cases and about 4,565 words.
1Tingling grinder body: why the 16 A MCB stayed closed and what to do before production resumes
At a small fabrication unit near Pune, a trainee feels a tingling sensation when touching the metal body of a 1.5 kW, 230 V bench grinder used for buffing. The grinder is fed from a 16 A MCB in a distribution board that has no RCCB.
896 words, about 4 min2Adding an AC and a geyser to a 2 BHK flat on an existing 4 mm2 submain
A 2 BHK flat in Nashik has a single-phase 230 V supply, sanctioned load 4 kW, with the meter on the ground floor and the DB on the first floor 25 m away along the wall. The submain is 4 mm2 copper PVC in conduit, protected by a 32 A MCB; final circuits are lighting on 1.5 mm2 with a 6 A MCB, and three socket points on 2.5 mm2 with a 16 A MCB.
895 words, about 4 min3DOL or star-delta for a 15 kW crusher conveyor that always starts loaded
A 15 kW, 415 V, 4-pole squirrel-cage motor drives the feed conveyor of a stone-crusher unit. Nameplate data: 27 A, 1440 rpm, efficiency 89 percent, power factor 0.86.
894 words, about 4 min4Submersible pump trips its MCCB after twenty minutes: reading the measurements correctly
A 7.5 kW, 415 V, three-phase submersible pump with a 15 A nameplate current serves a farm dug well. It is protected by a 32 A MCCB and a contactor with a thermal overload relay set at 16 A.
923 words, about 5 min5Estimating a small repair shop: BOQ, GST and a suspiciously low rival quote
A 60 m2 electronics repair shop is to be wired on a three-phase 415 V supply. The scope is 12 LED fittings of 18 W, 6 ceiling fans of 70 W, 8 six-ampere socket outlets, 2 sixteen-ampere power points (one for a soldering station, one for a test bench), and one 1.5 TR split air-conditioner.
957 words, about 5 min