On a more serious note if you don't have a registered business insure you choose one that limits your liability. More over please insure you have the proper amount of liability insurance enforce. The wood cutter adage of Measure twice - Cut once only goes so far for those situations of Oh Shit 
I've seen multimillion dollar companies go bankrupt in weeks because of a cut into a main feed whether it be water, electrical, gas.
There was a famous incident where a technician was working on a elevator cam and shorted out something in the system. It caused the elevator to drop to several floors below. Meanwhile the tech was in the service hatch standing on a ladder unsecured while the elevator dropped.
I've seen multimillion dollar companies go bankrupt in weeks because of a cut into a main feed whether it be water, electrical, gas.
There was a famous incident where a technician was working on a elevator cam and shorted out something in the system. It caused the elevator to drop to several floors below. Meanwhile the tech was in the service hatch standing on a ladder unsecured while the elevator dropped.
