TNPSC: Junior Training Officer (Wireman) Syllabus (Code 550)

For the **Combined Technical Services Examination (Diploma / ITI Level)** conducted by TNPSC, **Subject Code 550** is specifically associated with the "Trade: Wireman" examination. This subject is crucial for candidates aspiring to the post of **Junior Training Officer (Wireman)**.

🔍 Key Examination Details

• Subject Name: Trade: Wireman
• Subject Code: 550
• Examination Standard: I.T.I
• Language of Question Paper: English and Tamil

The comprehensive syllabus for Trade: Wireman (Code: 550) is designed to assess candidates on a wide range of electrical concepts, safety protocols, practical applications, and industry standards relevant to domestic and industrial settings. It covers fundamental principles to advanced topics in power generation and distribution, and the use of various measuring instruments.

📚 Detailed Syllabus Breakdown (Trade: Wireman - Code: 550)

Unit	Topic	Approx. Questions
Unit I	Safety and Tools Handling Focuses on safety rules, hazard identification, types of fire extinguishers (including electrical fires), rescue operations, first aid, waste material disposal, and accident prevention. Covers trade tools specifications, wire types and joints, soldering methods, and advantages of BIS/ISI standards.	10
Unit II	Basic Electrical and Wiring Installation Covers fundamentals of electricity including current, voltage, power, resistance, capacitance, Ohm's law, Kirchhoff’s laws, and simple electrical circuit problems. Includes types of electrical conductors and insulators, series and parallel combinations of resistors, and basics of magnetism.	20
Unit III	Circuit Breakers, Fuses, Motors, and Domestic Wiring Discusses single-phase and polyphase circuits, power, energy, power factor, cells, batteries, and different types of wiring systems like conduit and batten wiring. Explores necessity of various circuit breakers (e.g., MCB, ELCB, RCCB), fuses, switches, and construction/working principles of AC and DC motors.	20
Unit IV	Earthing and Industrial Wiring Covers methods of earthing (plate and pipe), relevant IE Rules, earth tester/megger usage, earth resistance, leakage current, and distinction between grounding and earthing. Addresses circuit main earth and portable earthing.	15
Unit V	Power Generation and Distribution Details power generating systems (hydro, thermal, nuclear), transmission and distribution (LV, MV, HV), and types of substations (indoor, outdoor, pole-mounted). Includes line protective devices, equipment like switchgear, circuit breakers, switches, protection schemes (current and potential transformers), protective relays, and lightning arresters.	20
Unit VI	Measuring Instruments and Testing Focuses on measurement of electrical parameters and system maintenance. Covers instrument classification (analog and digital meters), measurement of voltage, current, resistance, and use of MC and MI meters for AC/DC currents. Also includes wattmeters, energy meters, power consumption, phase sequence, frequency meters, stability, tong testers (clamp meters), MRI meters, and fault tracing in domestic wiring.	25
Unit VII	Alternators, Transformers, and Power Factor Covers construction and working principles of alternators and transformers. Includes different types of connections, power factor improvement, and use of capacitors.	15
Unit VIII	Cable Jointing and Wiring Accessories Details conductor materials, types of insulation, cable jointing techniques, cable testing (continuity, insulation resistance, earth resistance), and cable lugging and crimping. Covers symbols and uses of relay contacts, testing of various control elements and circuits, and use of various wiring accessories and their symbols.	20
Unit IX	Wiring Systems, Circuit Breakers, and Smart Home Automation Explores conduit wiring (surface and concealed PVC), cable forming and routing, and smart home automation wiring for lights, fans, and appliances. Includes estimation and costing.	15
Unit X	Domestic, Industrial Wiring, and Winding Covers types of domestic and industrial wiring, relevant IE Rules, National Building codes for house wiring, cable specifications, rating, material, and terms like maximum demand, load factor, and diversity factor. Discusses various wiring accessories, electrical fittings, cable management (types, uses, glands, IP ratings), bonding and grounding, and testing of cables for faults.	15

✅ Eligibility Criteria for Junior Training Officer (Wireman)

For the Junior Training Officer (Wireman) post, candidates must meet the following educational qualifications:

• Must have passed **SSLC** or its equivalent, AND
• Possess one of the following:
  • A **Degree in Electrical/Electrical and Electronics Engineering**, OR
  • A **Diploma in Electrical/Electrical and Electronics Engineering**, OR
  • A **National Trade Certificate** in Wireman trade, OR
  • A **National Apprenticeship Certificate** in Wireman trade.

📝 Examination Pattern Overview

The examination for this subject is part of the **Combined Technical Services Examination (Diploma / ITI Level)**. It consists of two papers:

• Paper I:
  • Includes Tamil Eligibility Test, General Studies, and Aptitude and Mental Ability.
  • Conducted in **OMR format**.
  • **Compulsory for all candidates.**
• Paper II:
  • This is the **Subject Paper - Trade: Wireman (Code: 550)**.
  • Conducted as a **Computer Based Test (CBT)**.

Important Note on Evaluation: To pass, candidates must secure a minimum of **40% (60 marks)** in **Part A (Tamil Eligibility Test)** of Paper I. Only if this minimum is achieved will Paper II (Subject Paper) and Parts B and C of Paper I be evaluated.

This detailed syllabus and examination overview should help aspiring candidates effectively prepare for the TNPSC Combined Technical Services Examination for the Junior Training Officer (Wireman) post.

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All the best for your preparation!