Deck 21: Reading Large Schematic Diagrams

Question 1

What does the notation (EP12246-00) indicate?

Answer 1

The notation (EP12246-00) indicates that you are looking at Electrical Print number 12246 and line number 00.

Question 2

Schematics in industry may contain several pages.

Answer 2

True

Question 3

Figure 21-5


At the right side of the schematic shown in the accompanying figure is the notation "LOCATED IN RELAY CABINET". What information is given by this notation?

Answer 3

This notation gives the physical location of such control components as starters, relays, and terminal blocks.

Question 4

Figure 21-2


The accompanying figure indicates that the motor is connected to a 2300-volt ____________________ phase 60 hertz power line.

Question 5

Figure 21-5


In the accompanying figure, at the far right-hand side is the notation (-08, 24, 14). What do these numbers indicate?

Question 6

Schematics in industry are often small.

Question 7

Push buttons, HOA switches, pilot lights, and so on are generally located on a control terminal where an operator has access to them.

Question 8

____________________ is generally used to help the electrician interpret the meaning of certain components and find contacts that are controlled by coils.

Question 9

All manufacturers use the same numbering and notation system for schematics.

Question 10

What does it indicate if coil symbols are used for overloads, not heater symbols, in a schematic?

Question 11

Figure 21-4


On line 02 of the schematic shown in the accompanying figure, there are three terminals marked TB-5B. These labels indicate ____________________ points.

Question 12

Figure 21-2


The accompanying figure indicates that there is a 200 amp, disconnect switch rated at 5,000 volts that can be used to disconnect the ____________________ from the power line.

Question 13

Figure 21-2


The accompanying figure shows ____________________ current transformers.

Question 14

How much output current do current transformers produce under a short-circuit condition?

Question 15

It is common for high voltage disconnect switches to have four contacts for the switch.