markyoung1984
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New to CCTV, trouble with N/C and N/O
markyoung1984 posted a topic in Installation Help and Accessories
If a normally closed circuit is a complete un-interrupted circuit, why does it show as 0 on my voltmeter, yet when the circuit is opened the voltmeter registers as 5 volts (which is what should be going through)? Could someone please explain? Thanks in advance