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biswanath.das
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Location: Kolkata, India
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DP MCB or 1P+1N MCB for 1 Phase Supply

02/08/2012 10:53 PM

For utility company 240V, 1 Phase power supply to your premises, what will you prefer for Main switch 1P+1N MCB or 2P MCB and why?

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Tornado
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#1

Re: DP MCB or 1P+1N MCB for 1 Phase supply.

02/08/2012 11:23 PM

Neither.

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biswanath.das
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#2
In reply to #1

Re: DP MCB or 1P+1N MCB for 1 Phase supply.

02/09/2012 7:40 AM

why?

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Tornado
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#3
In reply to #2

Re: DP MCB or 1P+1N MCB for 1 Phase supply.

02/09/2012 4:46 PM

In the U.S., in single-phase loads with an ungrounded "hot" line and a grounded neutral line, the neutral is not interrupted, and single-pole breakers/switches are used. There are some exceptions, but they are rather unusual. Your local Code may vary.

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electricalexpert65
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#4

Re: DP MCB or 1P+1N MCB for 1 Phase Supply

02/16/2012 10:09 AM

Why do you bother? There is no big cost difference between an SPN MCB and a DP MCB. Technically, it is better to opt for a DP MCB.
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biswanath.das (1); electricalexpert65 (1); Tornado (2)

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