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  1. Electrical
    I read that new fire alarm units use a 3-wire hookup, is that true generally? Would that be something like pos+neg+signal? I ask because we have an old alarm system in our house. It was built in ~1976. I know of at least one fire detector that is hard-wired into the alarm system, but if I...
  2. Electrical
    We're looking for a reputable alarm system installer in Boston. We'd like to purchase our own equipment and have a licensed professional install it for us. We're also considering having a local alarm system company evaluate our home and recommend and install the alarm system. We would use an...
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