Paired double pole MCB?

[parlinari]

This has been covered before, but I wasn't clear on the conclusion. I have a GE panel rated for 200 amps. My MCB is what appears to be a four pole breaker with all four tied with one bar, but is really a pair of double pole 100 amp breakers each covering a buss. This means I have 200 amps available. Is this correct?

 

[GoldDigger]

First, the NEC allows ONLY the manufacturer of the breaker (and usually the equipment it is part of) to parallel OCPD contacts in this way. It is not as common as it used to be, IMHO.

Second, your numbers do not add up.
Either the breaker is really a 150A two pole unit made up of two breaker pairs with common trip or it is a 300A breaker made up of two 150A breakers per pair.
I do not see any way to get 200A from the unit as labelled.
A 150A breaker would be legal for a panel with a 200 or 225A bus. A 300A breaker would not be.
Note the labeling on the handle tie that indicates that there is an internal common trip, since the handle tie by itself would not guarantee common trip action.

 

[al hildenbrand]

Welcome to the Forum, Parlinari.

If the photo you included in your opening post is the breaker you are asking about, then, that photo'd breaker is what it is labeled as: 150 Amps.

The 150 Amp Overcurrent Protection is accomplished by paralleling something in the nature of two 75 Amp breakers, but, as GoldDigger notes, only the breaker manufacturer gets to do it.

 

[kwired]

It says listed cir brkr 2 pole unit right on the left "pole" of the unit

You can not easily disassemble that into two 2 pole units or 4 1 pole units - it is intended to be one assembly.

 

[Jraef]

This is covered in 240.8, and it's important to note that this is ONLY allowed by the mfr of the breakers. hence, the "2 pole breaker" in that photo is labeled as "150A", meaning it is used as a 150A 2 pole breaker. The fact that each of the two poles is comprised on a 75A single pole breaker in parallel is irrelevant to you and I, and conversely, you and I cannot go out and buy 4 x 75A 1 pole breakers and create this ourselves.

By the way, you won't see this above 200A, because this type of load center breakers don't come in single pole above 100A.