ORIGINAL: piper_chuck
There's a reason electrical boxes are made from materials that are relatively non-flamable. Your local fire marshall would probably have a heart attack if he saw your home made power strip. For safety sake I hope nobody else uses your idea. Multiple receptical boxes are readily available and are a much better choice than wood.
Never really gave it much thought on being more flamable than plastic. I personly don't see much difference between the two. Receptical boxes used to be made out of metal. Real nice for a short on those kind....