One of the following does not represent a valid combination of ‘Class’ of insulating material :
One of the following does not represent a valid combination of ‘Class’ of insulating material and its limiting temperature in ‘Degree Centigrade’.
- ‘Class- H’ – 1800C
- ‘Class- B’ – 1200C
- ‘Class- A’ – 1050C
- ‘Class- F’ – 1550C