sparks

Hi all! Hoping for some advice: I'm renovating our stairs which includes the removal of some nails. I've checked: not all need to be removed and the ones I'm currently removing will be replaced with screws from the step above into the riser below. When I use my dewalt multitool with nail...

Just wondering what would have caused the following. I moved my NAS box from my kitchen to above my hallway data cabinet, and when I plugged the USB cable in between my NAS and the UPS, it shorted out all the 5v USB ports on my NAS. Unplug and re-plug the USB cable on the UPS end, same thing...