Adrian Kingsley-Hughes/ZDNET Follow ZDNET:  Add us as a preferred source  on Google. ZDNET's key takeaways Smart plugs can automate dumb devices, but they shouldn't power everything. Devices you can connect include lamps, chargers, fans, string lights, and TVs. Skip smart plugs for devices that heat up, have a compressor, or are over 1,500W. Smart plugs have some pretty great uses around the house, but they're not meant to handle every single electrical device in your home. Using a smart plug incorrectly can lead to dangerous situations, including tripped circuits, damaged plugs, and even house fires. Knowing which devices can and can't be used with smart plugs is vital. Also: Your smart plug is seriously underutilized: 7 ways I've programmed mine to automate my home Generally, smart plugs are rated for a maximum power draw of 15A, so you should never use a smart plug for anything that draws more than that, like heavy appliances.…