Over the course of working for many new homeowners, I am finding that very often houses that have been flipped have a lot of hidden dangers in them. Wiring that was supposed to have been "updated" often really hasn't been and what has been done is often not done correctly. (I am also finding that, many times, home inspections that come on referral are not done in the buyer's best interest.) Electrical problems can be hard to detect sometimes and it takes some considerable experience and knowledge of current code requirements in order to properly inform a home buyer of what they might be getting themselves into before they buy. I just got done working on a house that had been flipped and it had 120 volts connected to a ground wire that wasn't really grounded. Not only was this dangerous to persons, it also ruined several pieces of expensive electrical equipment. And, it was hard to detect what the problem really was or where it was coming from; it even fooled some of my more expensive electrical testers. Due to the improper and illegal electrical work done in some of these house flips, many home buyers are now facing extensive upgrades and repairs to what they thought was an "updated" electrical system.
My recommendations:
1) Have a reputable electrician come and have a look at the house you really want to purchase and let them explain to you what you might be dealing with before you buy. (I do recommend getting a home inspection first, then calling an electrician only after you know the home inspection has passed.) 
2) Hire your own inspectors. Do not take referrals from anyone involved in the deal, even your trusted realtor. Do your own homework and get your own references. 

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You will find some interesting electrical topics, such as using a transfer switch vs. using a breaker interlock at your main panel, why you might be getting shocked by your water faucet, proper electrical installations, safety tips, etc. and answers to other interesting electrical questions. - Please check these pages out and, if you like them, please hit the like button! These pages are still in the process of being built and added to, so if you have an electrical question and would like to discuss it, please feel free to send me an email and maybe I could answer in the form of a blog and help someone else too!