I'm applying for tenure-track jobs in the US and I wanted to know about the American etiquette concerning contacting the search committee before submitting an application. In the UK, where I am based, it seems to be encouraged for job-seekers to contact the department ahead of submitting an application to ask about the advertised post (and get your name recognised) — but I have heard in some circles (still with limited US experience) that Americans don't do this.
Should I get in touch with the individuals (presumably the chair of the search committee) named in the job advert? Would it be appropriate to ask why the position has become available/what specifically they are looking for and what else should I be asking - or would this be considered a faux pas?