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Join Date: Oct 2010
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# MCB Calculation

10/25/2010 12:29 AM

V=230v

p.f=0.8

calculate the total load current ,and MCB rate current.

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#1

### Re: mcb calculation

10/25/2010 12:43 AM
Anonymous Poster
#2

### Re: mcb calculation

10/25/2010 7:29 AM

Chapter 2, page 5.

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#3

### Re: MCB Calculation

10/26/2010 1:32 AM

P=36 W

V = 230VAC

PF = 0.8

Total I = (36)/(1.732*230*0.8)

Total I = 0.11Amps

MCB rated current would also be the same as the total current cause your system consists of only one load and your MCB is for that load too.

Regards,

DG EE.

Note** You can also find a lot of questions like this on the net. You can search them out and then pose a question.

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#4

### Re: MCB Calculation

10/28/2010 1:26 PM

What size is the cable?

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