The types of internal wiring used in domestic installations are

Question

Examoogle · Accepted Answer

Option D: All the above

Explanation & Concepts:
Domestic wiring refers to the method of installing conductors to deliver electrical power safely within a building. The listed methods—Cleat, CTS/RTS, and Conduit wiring—are all established techniques used based on the requirements of mechanical protection, cost, and aesthetics.

Working Principle: Wiring systems are categorized by the method of cable insulation and mechanical support. Cleat wiring provides minimal protection using porcelain cleats, CTS (Cab Tyre Sheathed) or RTS (Rubber Tough Sheathed) systems provide moisture resistance for surface mounting, and Conduit systems (Rigid PVC or Metal) provide robust mechanical protection by enclosing wires within protective tubes.

Key Formulas: $R = \rho \frac{L}{A}$ — Resistance of the conductor used in the wiring system; $I = \frac{P}{V \cos \phi}$ — Current carrying capacity requirement for selecting wire gauge

Key Points: Cleat wiring is primarily used for temporary installations due to low cost and easy inspection.; CTS/RTS wiring uses vulcanized rubber or PVC insulation, suitable for dry, indoor surface installations.; Conduit wiring is the most professional and safest method, offering high mechanical protection and aesthetic appeal.; Selection of a wiring system depends on factors like cost, durability, safety, accessibility, and maintenance.

Advantages: Cleat: Extremely economical and easy to install/maintain.; CTS: Resistant to corrosion and moisture.; Conduit: Maximum protection against mechanical damage and fire.

Disadvantages: Cleat: Unattractive and prone to mechanical damage.; CTS: Limited mechanical strength compared to conduit.; Conduit: High material cost and complex installation process.

Applications: Cleat: Temporary sites, construction sites.; CTS: Industrial workshops, domestic surface lighting.; Conduit: Modern residential buildings, commercial complexes.

Additional Info: CTS is also known as TRS (Tough Rubber Sheathed) wiring.. Conduit systems can be concealed (inside walls) or surface-mounted.

Answer: D is correct — All listed methods are standard, recognized techniques for domestic electrical distribution.

Exam Tip: Always remember that in Indian wiring standards (IS), Conduit wiring is mandatory for concealed domestic installations to prevent fire hazards.

Examoogle · Answer

Option A: Cleat wiring

Examoogle · Answer

Option B: CTS / RTS wiring

Examoogle · Answer

Option C: Metal / PVC conduit wiring

Correct Answer

Discussion (0)

Correct Answer

Related Questions

Discussion (0)