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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
 
 
 

 
 
 
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Why LT cables are not sized based on short circuit capacity.   3
in a plug point why the hole size at the top is large? Bhel 8
Which motor runs on both ac and ac? a) dc series motor b) reluctance motor   2
What is the difference between MCCB & MOCB?   1
How to run 1ph motor(230 VOLTS its full load amps is 4.5 ampa))with 480 volts main(we didn hav neutral)Thn we go for step down transformer.Our load 10 amps,so we conisder this amps in primary are secondary side   1
why do we use magnetic contactors ?circuit breakers are not enough?   5
it is clear that volts equal to the current as per ohms law. is it appliable to the AC power or only for DC. if it is appliacable to AC in transformers when voltage increases the voltage decreases ????? why?????????????? Bhel 11
 
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