Correct Answer - Option 2 : 130°C
Concept:
There are 7 class of insulating materials, each suitable for different application:
The permissible temperature limit at which the insulators may be worked safely without deterioration depends upon the type and class of the insulation as detailed below.
|
Class
|
Maximum temperature in °C
|
|
Class Y
|
Maximum temperature 90°C
|
|
Class A
|
Maximum temperature 105°C
|
|
Class E
|
Maximum temperature 120°C
|
|
Class B
|
Maximum temperature 130°C
|
|
Class F
|
Maximum temperature 155°C
|
|
Class H
|
Maximum temperature 180°C
|
|
Class C
|
Maximum temperature above 180°C (limited stability up to 225°C)
|
