I am installing audio system in a basement of a commercial premises.  I had planned to use the LSZH cable because I figured if it is safer then why not.  However, on receiving the cable I have found that it is significantly more rigid than conventional PVC cable and will consequently have a noticeable negative affect on our acoustic plan which is the main reason I have been employed to do this. 

I am mounting most of the cable in standard plastic trunking.  Am I right in thinking that if the cable is in plastic trunking the amount of smoke generated by the trunking will out weigh any improvement in visibility/toxicity provided by the LSZH cable.  The basement is not huge, we are talking about a gym for about 36 people to train in at a time.  

Many Thanks

Are you using any fire safety guidance in your proposals or is it just your own ideas?