One of the Authorised dealers I do ocassional work for was told by the large local Corp parent near me it was ok to put smoke detectors in an apartment building on a residental panel with a siren and did not have to use commercail equiptment .Because apartments are residential. good thing they listened to me and talked to AHJ before they started the job and lost there ass.\\
Makes you wonder what kind of authorsed dealer program there running when they give out this kind of advise. the fire alarm experts are working overtime on this one.