[Zeke]

I'll have to add in that old houses that have knob a tube weren't ready for microwave ovens and plug strips with TV's and all the peripherals. Kitchens and baths should be rewired along with outlets for heavy draw. So, really, look 171 is right. I just tend to be conservative.

I don't want to give bad advice. Now if we were talking about aluminum wiring, I'd be more afraid. That needs to be pigtailed with copper and anti-oxidant paste.

Wiring should only be put up to the task of what is was originally designed and installed to do. In my old house it runs everywhere, but it only runs lights. The kitchen and baths have been rewired and there are a couple of 20a outlets in each bedroom for TVs, etc.

Heat is the main deteriorating factor and oxidation is 2nd. Be sure to scrape the bare ends of old wiring when nutting up to another.