7. Which is mainly required to determine the dimension of building for preparing wiring estimation?
A) Schedule of work
B) Drawing layout
C) Types of building
D) Specification of materials
8. Consider the residual current device (RCD), according to I.E.E the maximum voltage to earth when a fault occurs should not exceed.
A) 70 volt
B) 40 volt
C) 50 volt
D) 80 volt
Answer (2)
The main requirement to determine the dimensions of a building for wiring estimation is the drawing layout. This layout includes detailed floor plans and elevations that inform electrical engineers of the necessary dimensions for accurate installations. Thus, the correct choice is B) Drawing layout.
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The student has asked two questions related to electrical engineering concepts, which are important components in the design and safety of electrical systems in buildings.
Which is mainly required to determine the dimension of a building for preparing wiring estimation?
B) Drawing layout
To prepare a wiring estimation for a building, the drawing layout is primarily required. A drawing layout provides a detailed visual representation of the building's structure, showing where each room and wall is located. This information is crucial because it allows engineers or electricians to see the physical dimensions they have to work with, which helps in planning the routing of electrical wires to different parts of the building safely and effectively. A drawing layout ensures that all areas are accounted for and helps in deciding the length and type of wires and possibly the positions of electrical outlets and switches.
Consider the residual current device (RCD), according to I.E.E the maximum voltage to earth when a fault occurs should not exceed.
C) 50 volt
According to the Institute of Electrical Engineers (I.E.E) standards, the maximum voltage to earth when a fault occurs should not exceed 50 volts. The purpose of setting this limit is to ensure safety by minimizing the risk of electric shock to users. Residual Current Devices (RCDs) are designed to interrupt the electrical circuit whenever they detect that the electric current is not balanced between the live and neutral conductors, which happens when there is a fault. By ensuring the voltage does not exceed this threshold, the RCD aims to provide protection against electric shock hazards.
