Not to go into a whole bunch of electricity stuff, an electrical outlet is not the determining factor what it can handle. Any outlet can handle a power strip. It is the breaker that is the determing factor. A breaker can be pushed to it's max load but that is never ever advisable. Circuit breakers are rated at 80% continuous load. If the only load on the circuit being fed by a single 20 amp breaker are 8 watt UTH's, that circuit could safely and continuously handle 200 heat mats. That is not a misprint, 200 eight watt heat mats would be just a tad over the output of a microwave oven or hair dryer. Don't ever over load a circuit but at the same time don't think a power strip will overload a correctly wired wall outlet. It's what is plugged into that strip. The thick cable on power strips were put on them for a reason. Calculating total load on a circuit is easy. See what you come up with and go from there. Just remember the 80% rule and you will be fine as long as your house wiring is up to the task. Also with cold weather upon most of us, insulating enclosures goes a long ways and allows low wattage heat sources to work well. I figured out many years ago those Mylar emergency blankets are about useless to use in the field. I quickly realized though they can work great to insulate my snake enclosures in the winter. If Mylar was good enough for NASA it's good enough for my snakes.![]()