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Hey Guys,

Please bear with me i'm ignorant when it comes to electrical systems. I've always wondered why do they make low voltage systems. Why not make all systems lets say 120 volts except obviously when higher voltage is required. What is the advantage of having a low voltage motor, thermostat, etc...
Although 120 isn't really high... low voltages are safer and cheaper because they require less insulation and less space between conductors. Also in controls DC is often used.
 
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Contractor of the Month
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Agreed. Wiring that isn't low voltage have a much higher chance of having issues, generating heat, etc. when inside the wall. Speaker wire is low voltage and I usually use shielding, but mainly to protect from interference from power lines than to protect the system from overheating and having fire issues. Also, certainly you can cut speaker wire or coax cable etc. without worrying about shocking yourself. I had a client recently (www.facebook.com/smarthousesolutionsms) who was using telephone wires to run speakers. It can work, but not very well.
Don't it increases the capacitance, not good for speaker wire.
 
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