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<blockquote data-quote="Snattlerake" data-source="post: 3923200" data-attributes="member: 44288">Yes.&nbsp; Induction is a real problem in construction.&nbsp; High voltage cables are required by code to be installed a certain distance from all low voltage cables when they run parallel and there are even codes for crossing the cables at right angles.&nbsp; Depending upon the voltage and the type of conductor and whether or not it is in conduit or MC, determines the distance away from the LV cables.&nbsp; You absolutely cannot run LV cables inside the same conduit or raceway as high voltage lines.&nbsp; That can cause all kinds of problems.&nbsp; Our policy at our company was one foot from any alternating current lines under 240 VAC.&nbsp; This exceeded code but made sure we were compliant in any jurisdiction and any future code changes.&nbsp; Your high voltage energized the circuit of the alarm board that creates the siren sound.&nbsp; It could be embedded into the speaker you found or at the alarm panel where the wires are going. I didn&#039;t see the speaker type.&nbsp; It could be inside the back.&nbsp; Hook up a 12 volt battery to the two wires with red and positive and black as negative.&nbsp; You will most certainly find out if it is a siren or a speaker.</blockquote>

[QUOTE="Snattlerake, post: 3923200, member: 44288"] Yes. Induction is a real problem in construction. High voltage cables are required by code to be installed a certain distance from all low voltage cables when they run parallel and there are even codes for crossing the cables at right angles. Depending upon the voltage and the type of conductor and whether or not it is in conduit or MC, determines the distance away from the LV cables. You absolutely cannot run LV cables inside the same conduit or raceway as high voltage lines. That can cause all kinds of problems. Our policy at our company was one foot from any alternating current lines under 240 VAC. This exceeded code but made sure we were compliant in any jurisdiction and any future code changes. Your high voltage energized the circuit of the alarm board that creates the siren sound. It could be embedded into the speaker you found or at the alarm panel where the wires are going. I didn't see the speaker type. It could be inside the back. Hook up a 12 volt battery to the two wires with red and positive and black as negative. You will most certainly find out if it is a siren or a speaker. [/QUOTE]

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