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Are there any minimum clearance requirements for mounting several Q4 Breakers together?<br /><br />What is the clearance for the top or bottom of the breaker?<br />

The electrical clearances for an individually mounted Q4 breaker would be as follows.

From the top of the breaker to the top of the enclosure is 6 inches.
From the bottom of the breaker to the bottom of the enclosure is 4 inches.
From the side of the breaker to the side of the enclosure is 3 inches. (This is for both the left & right side)

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