joel hoffman

Fara, is your question related to a specific solicitation or a question in general? If specific, I'd recommend that you ask the government contracting office for clarification. I haven't found any specific official clarification or definition but a "system", such as a telecommunications system or telephone system or building electrical system, generally incorporates the wiring  and conduit that connect the switches,  devices, distribution boxes, etc. 

i do know a couple of friends that own or work for fire protection installation and maintenance companies. I can ask them how this has been interpreted. You could also ask your contacts at those type firms.