I work on live DC circuits all the time
...Of course they're only between 5-12Vdc...but they're live, does that count?
Im trying to set my whole garden up in DC, with a bunch of power inverters and maybe some car batteries.. any suggestions?
actually, I do something similar to this. last fall I moved into the house I'm at now. when winter came, I had problem after problem with pipes freezing. by the time spring came around, I had either replaced or reinstalled every pipe in the house and properly insulated everything. there is a section of pipe, the water main coming out of the ground to the house. it was exposed to the cold air with only a torn up heat cord and some pipe wrap falling off of it. I built a box around the pipe with plywood and insulated it. I put 2 porcelain light socket in the box and wired them in series 120v, so they each run at half power. they're not as bright, put off about the same amount of heat, use less power then normal, and last much much longer. my dad has a single bulb in a similar set up. he replaces it probably 3 times over the winter. mine haven't blown out once yet, but, if one blows out, the other will go out too.