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Tandem Breakers - Old Westinghouse Box

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4.5K views 4 replies 3 participants last post by  nunavut  
#1 · (Edited)
Greetings,

I am a 1st time poster. I have some experience in electrical wiring, recently adding a new 40 amp circuit into my panel box, installing new outlets, etc.

My issue/question is this. I have an old Westinghouse panel box with bolt-on style breakers (shown in the photos.) Currently this panel box is full (photo shown has an open space but that is now full.) I recently purchased a Intermatic IG Series Surge Protective Device (install diagram shown) which needs to be wired to a 2-pole 20A circuit. Unfortunately as my box currently stands, I have no additional space to add the required 2-pole 20A.

I am thinking that a solution may be to add two 20A tandem breakers which would allow me to remove four 20A single-pole breakers, thus allowing me to add the required 2-pole 20A for the surge protection device.

My questions are:
  1. Will this panel box accept tandem breakers?
  2. If so, which side should they be added on?

I would sincerely appreciate any advice and comments.
 

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