clarification re. load center numbers for "spaces" and "circuits"

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RustyShackleford

Senior Member
Location
NC
Occupation
electrical engineer
Siemens load centers (I assume others are similar) spec their main breaker/lug load centers according to the number of 1" spaces, and also the "number of circuits" (since the latter number can be greater by using "space-saver" breakers).

My question: when counting circuits, do double-pole (240v) circuits count as one circuit or as two circuits ?
 
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