Answer / shalini.b

NO means normally open - during off condition or any other
abnormal fault condition the contact will open therby
forming a open circuit providing no path for the flow of
current.
NC means Normally close- during normal operations the
contact will be closed forming the closed circuit

Answer / karthik.$

"NO" means normally open that means, the corresponding coil
is not energized it will be in the open condition. it will
closed only the condition satisfied."NC" means normally
closed condition if the corresponding coil is energized it
will open ... The NO & NC element and contact are normally
used in control circuit and the PLC LADDER LOGIC....

Answer / mahder

No is normally open contact, that means at normal condition
it's open and the after getting energy or after being
energized it will change to closed or it will close it's
normally open contacts.
Nc is normally close contact, Nc have the reverse function
of No, at normal condition it contacts are closed and when
it gets energy(power) it will open it's contacts.

Answer / vinod

relays/ pressure switch/temprature swicth etc. have NO & NC
contacts
NO (Normally Open) means the contact of the relay will be
open during the relay coil de energised condition and
contact close when relay coil energised condtion.But in
thermal switch NO means swich conacts open during the set
temprature and close when the temprature exced the set
value.
NC (Normally Close)means the contact of the relay will be
close during the relay coil de energised condition and
contact open when relay coil energised condtion.But in
thermal switch NC means swich conacts close during the set
temprature and open when the temprature exced the set value.
NO & NC can be used in control/power circuit depends on
requirement.

Answer / md. zakir hosen

In the case of Relay:
NO means Normally Open.
NC means Normally Closed.

also In the case of IC (Integrated Circuit ):
NC means No Connection

thanking u
z_hosen@yahoo.com

Answer / sunil kanusu

no means normal open i.e initially its contacts were
open.And nc means normal close i.e initially its contacts
were closed.In control applications these very useful.if we
press 'no' its contacts closed otherwise contacts were
open.similarly if we press 'nc' its contacts open otherwise
contacts were closed.

Answer / p.satheesh

No means No
Nc Means NC

Answer / venkatesh sk

no means nomal open function nc meanis normal open it is
used in control cricut

why the neutral point is zero in star connection?

4 Answers  

what are factors to be consider in electrical installation like load factor,diversity factor .....

0 Answers  

There is no such thing as a Generator. All power generating devices are Alternator since both generate alternating current since this is the only way electrical power can be generated. In "generators" the alternating current is converted into DC inside the housing of the "generator" in order to give out DC Do you agree? If not please educate me. How else is DC generated if not like above?

2 Answers  

What the difference between three phase contactor (coil 110vac) & three phase SSR (control voltage 110Vac)? May I use contactor in place of SSR?

0 Answers  

what the reson to use phase shift( angle) like (dyn11,Dd5 or Dy0)are usedin power and transsmison line

1 Answers  

transform oil how going to act like ainsulation purpose

1 Answers   Siemens,

In liquid rotor starter how PH valve should be maintained.

1 Answers  

rajha power sector details

0 Answers  

What is the difference between a Root Locus plot and a Bode plot?

0 Answers   GE,

what is the formula for efficiency of francis turbine and generator for hydropower? what is best way to select francis turbine and generator?

0 Answers   HAL,

Induction motor & transformer both has magnetic core,then why induction motor is a inductive load & transformer not???

6 Answers   SBL,

what are the differant std sizes of cable trenches?

0 Answers