We've had quite a few series of severe storms over the past few weeks. Unfortunately most of them have been occurring around midnight, and have been severe, so there have been some sleepy work mornings the day after, having not gone to sleep at my usual time.
I've had a fascination with lightening and storms since I was a kid. Regarding lightening being "attracted" to electricity, that is a myth. Basically lightening is on such a large scale that little wires in a house or on poles along the ground have no impact on the functionality.
The basics of lightening is primarily the result of the build up of negative ions at the base of a thundercloud (the positive ions are found at the top of the cloud). This results in the ground taking on a positive charge. As the charged ions build, like most rules of electricity, the negative ions want to find a ground. The ions from the clouds start sending out streams called "leaders" which "step" in all directions (sideways, up, down). The positively charged ground also starts sending upward leaders (also called "streamers"). When a downward and upward leader connect, ground is achieved and the electric discharge occurs. The interesting thing is the "bolt" of lightening we see is actually not electricity flowing down from the cloud, it's actually electricity flowing up into the cloud.
A good explanation with a link to a nice slow motion capture of a strike demonstrates this at this site:
http://ec.gc.ca/foudre-lightning/default.asp?lang=En&n=9353715C-1As far as strikes inside the house - though it's not the bolt itself striking the wiring, if a strike does hit a house or nearby - due to he massive amount of electricity being discharged, but proximity, the flow of electricity may jump to a nearby ground when flowing - which could include metal pipes or electrical housing wires. And since it's so massive a discharge, that flow could easily rip through a whole section of house wiring making it appear that the lightening struck inside the house, when it probably struck outside and the electricity was conducted inside via the laws of physics.
This is why during an electrical storm it's recommended to stay away from windows/walls with electrical wiring, not to run appliances or other electrical equipment, and not to take a shower (yes, water can conduct electricity too).
Hope some find this interesting.