Rating of Sockets/Switches

[jyo abraham]

For a window a.c of 2500 W,230V as maximum current
through it is 10 A , we need a socket of 30 A(or
near to that as per American Standards).
If I know the current through a device,how I can
determine the rating of socket associated with it,
means how many fold of current rating of device?

 

[bennie]

Re: Rating of Sockets/Switches

Interesting use of the word fold. I like that. The receptacle, in this case, should be two fold, or rated at 20 amps. A 15 amp may comply, but I would go for the 20 on a motor operated appliance.

 

[jyo abraham]

Re: Rating of Sockets/Switches

What is the normal working currrent of 2500 w
a.c?What is the m.c.b used?
Thank you for earlier reply.

 

[roger]

Re: Rating of Sockets/Switches

Jyo, the "current" is dependant on the voltage, and some other properties, but for this voltage will suffice.

At 230v 1 phase = 10.87 (2500/230)
At 120v 1 phase = 20.83 (2500/120)
At 208v 3 phase = 6.94 (2500/208/1.732)

A/C's and motors are not handled the same as other circuits when it comes to circuit breakers.

In your case a 20 amp breaker should be fine.

Roger

 

[jyo abraham]

Re: Rating of Sockets/Switches

I have 5 equipments connected under an mccb.Each equipment have individual mc.bs of
240v,single phase as under;

1. Air Condition 2900VA
2. Air Condition 2500VA
3. Water Heater 4500W,19A
4. Dryer 5600W,24A
5. Air Condition 3750VA

As total current through all mc.bs are 12+12+19+24+15 = 82 A ,MCCB RATING of main mccb should be more than 82A ie 100A ,considering there is a chance that all equipments will work
simulteneously is this estimation correct ?

Could you also pls. say about rating of each m.c.b
ie,5 numbers?

 

[jyo abraham]

Re: Rating of Sockets/Switches

a

 

[bennie]

Re: Rating of Sockets/Switches

The 100 amp should be OK under normal operatiion. I understand you encounter numerous power outages.
All of the units will attempt to start at the same time, and will likely dump the 100 amp breaker.
Turning off the units and starting them individually will correct the problem.