08/26/2016
Questions gladly answered - Probably in far too much detail ;-) but I'll explain the bafflegab words, so feel free to ask more questions. There are things everyone should know, starting with "How do I know when to start running, and how far is the Minimum Safe Distance" so I can stop?
All depends on how loud the "ZZZZAAAAPPPPP!!" Noise behind you is, mostly a factor of voltage. 120/240v around the house, 10 feet is enough. It won't jump out and grab you - but higher voltages Can...
Note that 120v or 240v will kick you away - 480v and up makes your muscles clamp down and hold on. Especialy the transmission voltages. You do Not grab things that might be energized with your hand and fingers, you brush the back of your hand into it first instead - if there's leakage voltage there your nerves will automatically clench your arm muscles and kick your hand clear before you even realize it.
When it's 277/480v in an industrial unit, 30 feet. 2400v or 4800v in a large factory or the top pole wires in your neighborhood, 50 feet. 34.5KV the big power lines to your city up through the 500KV interstate lines, better make it 250'
If Lightning strikes a power line it can trip off a plasma arc between the lines, and travel down the lines long distances - Run at a right angle to the lines, and try to get inside or behind cover (solid wall, a car) because that arc can release enough heat and UV to get burns.
Don't Stare At The Arc!! Like watching a welder, you can burn your corneas if you arent wearing a dark enough mask... Once you get clear you can watch the video for laughs.
If there are lines down from a pole, keep a good 100' minimum and keep everyone else away too. Unless you are sure it's a Telephone or CATV line. For a 100KV and up lattice-pole transmission line, make that 250' at least. The ground around the downed line can be energized like a "puddle of death", even without obvious arcs and sparks.