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View Full Version : enlighten me on breaker



snafflekid
08-26-2007, 11:36 PM
What is the purpose of quad circuit breakers? Specifically, a Siemens QT breaker with 15/30/30/15 amp breakers where the center pair are common trip? I have also seen quad, tandem circuit breakers in the same configuration but only take two spaces.

jwelectric
08-27-2007, 05:43 AM
You have one 15 amp and one 30 amp two pole breaker in one unit

jimbo
08-27-2007, 06:05 AM
It is simply just that...a double pole 30, and two 15's. Probably a convenicence for the installer, and maybe a little less expensive.

Many brands make "regular" and "thin" breakers to work in the same panel.

hj
08-27-2007, 06:38 AM
They are used when the box does not have adequate openings for all the breakers needed, assuming the panel has the capacity for the added loads.

snafflekid
08-27-2007, 02:02 PM
It is simply just that...a double pole 30, and two 15's. Probably a convenicence for the installer, and maybe a little less expensive.

Many brands make "regular" and "thin" breakers to work in the same panel.

I thought I once saw MC cable (or maybe it was BX) that had 3 10 AWG wires and 3 14 AWG wire in it (or some similar configuration) and thought quad breakers were made to convieniently match with this cable in multiwire branch circuits??? HMM.