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Question
what is different between IP55,IP54 and IP66?
 Question Submitted By :: Electrical-Engineering
I also faced this Question!!     Answer Posted By  
 
Answer
# 1
Ingress Protection Rating consists of the letters IP
followed by two digits and an optional letter.It classifies
the degrees of protection provided against the intrusion of
solid objects (including body parts like hands and
fingers), dust, accidental contact, and water in electrical
enclosures
IP55-(5)dust protected,(5)Water projected by a nozzle
against enclosure from any direction shall have no harmful
effects
IP54-(5)dust protected,(4)Water splashing against the
enclosure from any direction shall have no harmful effect
IP66-(6)dust tight,(6)powerful water jets
 
Is This Answer Correct ?    66 Yes 4 No
Milind Parashar
 
Answer
# 2
shall specify "louvers" 
Is This Answer Correct ?    6 Yes 1 No
Preveen
 
 
 

 
 
 
Other Electrical Engineering Interview Questions
 
  Question Asked @ Answers
 
What is power focter ?   6
what is formula of dc current and resistance.   2
How will you determine the rating of a motor for continuous duty variable load motor applications?   1
What is the current flow in 230v ac supply ? What is the current flow in 415v Ac supply ?   6
What is skin effect?   1
if 20 hp motor starts directly delta connection.motor what will be the effect. HP 3
where they are using surge arrester and lighting arrester? how they connect? what is the purpose of that?   1
how induction generator generated the power without excition like syncronous generator.   3
why we use core type and shell type transformers?   1
What is the use of arc chute in ACB? lenovo 7
DIFFERENCE BETWEEN POWER AND CONTROL CABLES   9
How much load can give on 1600 kva transformer 11kv/440   5
 
For more Electrical Engineering Interview Questions Click Here 
 
 
 
 
 


   
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