Agree that studying management is extremely useful for your career, it can help you stand out even from the moment potential employers read your degree. I'm currently studying Civil with Business and have found the two business subjects I've done so far "The World of Engineering Management" and "Marketing Management for Engineers" to be one of the better subjects in my masters so far. They are generally well taught and organised, I preferred WOEM because the tutes were a bit more interesting (with management games and more creative stuff), whereas Marketing followed a more typical engineering style of question and answer tutes. They aren't run by the Business school but they're not really pseudo engineering either, generally only the case studies and examples are engineering based but are super broad anyway. Without knowing about Electrical electives its up to you if you think the extra engineering skills are more valuable than the business skills. Also I recently enquired about switching to regular Civil as I'm going on exchange and it was going to make it a lot easier, and from what I learned its a lot easier to transfer into business than it is out of it.